Pulse or digital communications inventions 06/06

20060140249 - Pulse waveform producing method: The present invention forms, in UWB communications in which a pulse of short duration is transmitted, a transmission signal with a desired frequency characteristic by adjusting the shape of a pulse signal used in data transmissions. As a result, radio interference with other wireless systems in UWB communications is reduced....

20060140250 - Time resource allocation method of ultra wideband communication system: A time resource allocation method of ultra wideband (UWB) communication system is disclosed wherein transmission power is adjusted in a UWB communication system to appropriately allocate time resources of data transmission period. The present invention is such that determination is made as to whether there are time resources for allocation...

20060140251 - Frequency hopping communication system: The invention provides an adaptive frequency hopping spread-spectrum (FHSS) transmission system and method, which efficiently utilizes available transmission bandwidth, whilst providing robustness to jamming techniques in wireless communication systems. The proposed technique operates by transmitting a wide-band signal over multiple, single-carrier, parallel transmission subbands, which may occupy non-contiguous frequency regions....

20060140252 - Apparatus and related method for data transmission across a wireless network: The present invention provides for a transmitting means for transmitting data packets in a wireless network, wherein at least some of the data packets are arranged to include clock data for use at a receiving means in the network for clock reconstruction at the receiving means, the transmitting means including...

20060140253 - Ultra-wideband transmitter and transceiver using the same: An ultra-wideband transmitter is provided which can reduce a leak of a local signal into a transmitted signal with a pulse train output from an antenna in UWB-IR communication. The transmitter comprises a pulse generator 0140 for generating a pulse signal having a pulse train of pulses produced intermittently according...

20060140254 - Multi-path detection method for cdma receivers: The present invention provides a method for a multi-path detection analysis and selectivity of CDMA signals using spread spectrum receivers using a correlation technique. The invention is based on determining by the spread spectrum receiver whether a distortion of a received radio frequency signal, caused by a multi-path component of...

20060140255 - Method and device for detection of a umts signal: The present invention relates to a method (and corresponding device) of detecting a first signal in a received signal using a pattern, the received signal comprising at least one signal group, each signal group comprising a number of signal symbols, the pattern comprising at least one pattern group, each pattern...

20060140257 - Method for carrier frequency offset fine estimation in td-scdma system: A simple and efficient method is provided for frequency offset fine estimation. The method comprises: subtracting the QPSK modulation phase of a synchronization code from its received phase to generate the phase drift, and then computing the frequency offset based on the phase drift....

20060140256 - Removing bias in a pilot symbol error rate for receivers: The present invention provides a method and an apparatus for measuring a reception quality on a wireless communication link to a receiver by removing a bias in a plurality of received pilot symbols and obtaining a channel estimate for a channel, such as a wireless propagation channel, after substantially removing...

20060140258 - Sub-symbol parallel inteference cancellation: Reduction of multiple access interference, in one example for asynchronous CDMA systems using long codes. In one aspect, parallel interference cancellation (PIC) implements a decoupled estimate, preferably non-linear and applied at chip intervals. According to another aspect, interference is cancelled using a technique that estimates bits for a symbol by...

20060140259 - Sub-symbol parallel inteference cancellation: Reduction of multiple access interference, in one example for asynchronous CDMA systems using long codes. In one aspect, parallel interference cancellation (PIC) implements a decoupled estimate, preferably non-linear and applied at chip intervals. According to another aspect, interference is cancelled using a technique that estimates bits for a symbol by...

20060140260 - Power supply line communication modem and power supply line communication system: A modem for power-line communications (20A) comprises input/output terminals (71a and 71b) and input/output terminals (72a to 72d). The input/output terminals (71a and 71b) are connected to a power line and perform input and output of power-line communications signals. The input/output terminals (72a to 72d) perform input and output of...

20060140261 - Apparatus for automatically detecting ber measurement signal: An apparatus comprises input means, detection means and a selector, and automatically detects a kind of serial signal used in BER measurement. The input means receives at least two signals which include a data signal, and a clock signal having a period corresponding to one bit of the data signal....

20060140263 - Equalizers and methods for equalizing: Equalizers and methods of equalizing, wherein an equalizer may include includes n (where n is an integer ≧) biquad circuits each include an input node, a biquad band pass node and a biquad low pass node, a first summing circuit summing an output of the biquad band pass node of...

20060140262 - Low voltage multistage adaptive equalizer: The present invention is related to an adaptive equalizer comprising multiple tuning circuits that generate tuning signals. Each tuning signal can typically induce higher frequency gain up to a limited level, e.g. +5 dB, at the upper data frequency for compensation of high frequency losses in the connected transmission channel....

20060140265 - System circuit and method for transmitting media related data: There is provided, in accordance with some embodiments of the present invention a system, method and circuit for compensating for delays introduced by varying processing loads associated with the transmission of related media component signals to dispersed and separate media presentation devices. According to some embodiments of the present invention,...

20060140264 - Video encoding method and corresponding encoding and decoding devices: The invention relates to an encoding method applied to a video sequence corresponding to successive scenes and generating a coded bitstream in which each data item is described by means of a bitstream syntax allowing, at the decoding side, to recognize and decode all the elements of the content of...

20060140267 - Method and apparatus for providing intra coding frame bit budget: The present invention discloses a system and method for adaptive adjustment of bit budget that favors the allocation of bits to intra coding frames (I frames). Namely, an encoder is able to dynamically adjust the bit budget for each picture type in an image sequence, thereby effecting proper usage of...

20060140268 - Method and apparatus for reduction of compression noise in compressed video images: A video processing method and system that obtains, transmits, and processes digital video compression rate information between a video receiver such as a Set-top-box (STB) and a display device such as a TV set. The compression rate information is obtained by the video receiver and delivered to a compression noise...

20060140269 - Video coding: A method and apparatus for encoding an input video bitstream to produce an encoded output bitstream is disclosed. A base stream is enhanced based on enhancement control parameters. At least one picture content parameter is extracted from the enhanced base stream. At least one picture content parameter is extracted from...

20060140271 - Encoding and decoding of video images with delayed reference picture refresh: The present invention relates to the encoding and decoding of images of a video sequence. A reference image refresh is delayed from the temporal position of an IDR-type image within a sequence of encoded images in order to enable an inter-prediction to images to be displayed prior to the IDR-type...

20060140270 - Method and an apparatus for controlling the rate of a video sequence; a video encoding device: A method for rate control for encoding video sequence, wherein the video sequence comprises a plurality of Group Of Pictures, wherein each Group of Picture comprises at least and I-frame and an Inter-frame, the rate control method comprising the following steps for the encoding of the Inter-frame in the Group...

20060140272 - Wireless transmission of data signals in a bicycle, exercise equipment or the like: An apparatus includes a frame having first and second spaced apart areas. A movable member is mounted adjacent the first area, and a sensor senses an operating characteristic of the movable member. A data receiving device is located in the vicinity of the second area of the frame. A first...

20060140273 - Dual-pass hdtv encoder with noise reduction: An exemplary embodiment of an apparatus (10) for encoding a high definition television signal includes an image decimator and cropper (11) to convert the high definition television signal to a lower resolution television signal and two encoders (12, 16). The first video encoder (12) is coupled to the image decimator...

20060140275 - Motion vector operation devices and methods including prediction: A motion-vector operation device includes an upper memory composed of first and second banks that store motion vectors of a lower block group belonging to a macroblock, a left memory storing motion vectors of a right block group belonging to a macroblock, and an estimator predicting a motion vector of...

20060140274 - Transcoder and method used therein: A transcoding method and transcoder A compressed bitstream of video data is received and it is determined whether a skipped block occurs in the compressed bitstream. When the skipped block occurs in the compressed bitstream, a corresponding skipped block is generated in a transcoded bitstream without performing error compensation for...

20060140266 - Method and system for measuring video image degradations introduced by an encoding system with throughput reduction: A method of measuring the degradations in a digitized image, which are introduced during the encoding of the image is provided. The method consists in: retrieving the block decomposition of the image used during the encoding thereof; offsetting the coding grid in relation to the image such as to define...

20060140276 - Encoding method and apparatus enabling fast channel change of compressed video: A video encoder and corresponding method are described for enabling fast channel change of compressed video, where a video encoder for receiving input pictures and providing compressed stream data includes a normal encoding portion for receiving input pictures and providing normal stream data, a lower-quality encoding portion for receiving input...

20060140279 - Image coding apparatus with segment classification and segmentation-type motion prediction circuit: A segmenting section divides an input image into a plurality of segments. A hierarchizing section determines classes of the respective segments according to a predetermined criterion, and produces a class identification signal indicating the classes of the respective segments. A coding section encodes the segmented image signal into code data...

20060140277 - Method of decoding digital video and digital video decoder system thereof: A method for decoding pictures from a digital video bit-stream includes providing a first buffer and a second buffer being overlapped with the first buffer by an overlap region; decoding a first encoded picture from the bit-stream and storing a corresponding first picture into the first buffer; and decoding a...

20060140278 - Technique for adaptive de-blocking of block-based film grain patterns: Reduction in the blockiness of a simulated film grain block can be achieved either by the use of adaptive downscaling or adaptive deblocking filtering to adjust the intensity of the pixels at the block edge in accordance with at least one film grain block parameter, such as film grain size,...

20060140280 - Device for recording video data and audio data: When a pause request occurs, an audio delay time constituted by a delay time of frames of audio data based on the video data frames is found. During the pause, a frame offset time constituted by the offset of the frame start time of the video data and the audio...

20060140281 - Video coding apparatus and video decoding apparatus: A video coding apparatus includes a coder section 101 for coding an input video picture, an important information constructing section 102 for extracting important information from coded information obtained by the coder section, a sync signal generator section 103 for generating a sync signal, and a bit stream reconstructing section...

20060140282 - Method for decoding a plurality of standard radio waves and standard radio wave receiver: A method and a standard radio wave receiver for receiving a plurality of standard radio waves respectively having signal configurations in accordance with respective specifications which define carrier channels and formats and for decoding time code signals carried by the standard radio waves. The method extracts at least part of...

20060140283 - Data processing circuit with a driver and a receiver: A data processing circuit has four signal conductors between a driver and a receiver, and first and second, mutually conducting shield planes. First and second signal conductors form a symmetrical stack in a column between the first and the second plane. Third and fourth signal conductors are arranged substantially midway...

20060140284 - Single conductor bidirectional communication link: A driver is coupled to a single conductor wire that may be electromagnetically shielded to drive serial signals on the wire, and a receiver is coupled to the wire and to the driver to receive serial signals from the wire at the same time....

20060140285 - Digital filter circuit and method for blocking a transmission line reflection signal: A digital blocking filter (120) and filtering method are provided for a device (100) receiving signals from a transmission line. The transmission line, which may comprise part of a complex bus system, is incompletely terminated, thereby resulting in a reflection signal within the line with transmission of a signal. The...

20060140286 - Electric power switching apparatus providing reduced degree of noise interference with radio communication: In an electric power switching apparatus a control circuit generates a switching control signal, for controlling successive current switching operations, as a of succession of pulse period patterns with each pulse period pattern made up of one or more successive pulses each having an identical pulse period, and with successive...

20060140296 - Apparatus and method for reducing the peak-to-average power ratio of ofdm/ofdma signals: An apparatus is provided for reducing the peak-to-average power ratio (PAPR) of a multicarrier transmission system. The apparatus comprises a detector for receiving a plurality of symbols to be transmitted and determining a peak amplitude of the plurality of symbols and a controller for determining if the peak amplitude associated...

20060140291 - Architecture for multi-channel digital signal processing: The present invention is directed to a multi-channel signal processing system that includes a fast Fourier transform (FFT) module configured to perform an FFT using a first channel time domain sample as the in-phase component of a complex signal input, and by using the second channel time domain sample as...

20060140294 - Block modulation: A device for block transmission involving a first number of subcarriers (N), comprising: storage means for storing at least one transmission matrix having a dimension equal to the first number. The transmission matrix being arranged so that the columns of the transmission matrix represent a first transmission characteristic and the...

20060140289 - Method and apparatus for providing an efficient pilot scheme for channel estimation: An approach for utilizing a pilot scheme in a spread spectrum communication system (e.g., Multi Carrier Code Division Multiple Access (MC-CDMA)) is provided. A communications link includes a sub-bands and a single pilot channel that is designated for the sub-bands for channel estimation. Pilot symbols transmitted over the single pilot...

20060140293 - Method for detecting signal and estimating symbol timing: A method for detecting signal and estimating symbol timing is provided. The method is applicable to the receiver in an OFDM system. The method uses the autocorrelation of the short preamble of input signals to detect signals, and performs the coarse frequency offset compensation at the same time. Then, the...

20060140295 - Multi sub-carrier communication system and method providing improved frequency equalization performance: There is provided a multi sub-carrier communication system for providing improved performance of a frequency equalizer and a method thereof. The multi sub-carrier communication system includes a frequency equalization coefficient (vector) calculation unit that receives an equalized signal outputted from a frequency equalizer and periodically calculates a new frequency equalizer...

20060140297 - Multicarrier receiver and methods of generating spatial correlation estimates for signals received with a plurality of antennas: In a multicarrier receiver, spatial correlation estimates are enhanced by multiplying by weighting values generated from a channel length estimate. The channel length estimate is calculated from a channel estimate (e.g., an estimate of the channel response function) and a signal-to-noise ratio estimate. The spatial correlation estimates represent the correlation...

20060140292 - Process of synchronization in the time and frequency domain of multiple equipments in a transmission system with ofdm modulation: Allows synchronisation of multiple users by means of improving the estimation of the start of the OFDM symbols and improving the estimate of frequency error in noisy environments or in frequency selective channels. It is characterized by the decomposition of the received signals x(n9, that contain data and synchronization sequences,...

20060140298 - Reduced complexity multicarrier precoder: A reduced complexity precoder provides an efficient method and structure to precode a vector-signal-point sequence for transmission through a band-limited channel. The precoder enables a block-oriented receiver to recover an underlying data stream in the presence of inter-symbol interference and noise. The precoder structure is applicable to multicarrier systems such...

20060140287 - Simultaneous bi-directional link: A memory system with a simultaneous bi-directional link includes a controller, a memory device and a set of signal lines coupled to the controller and the memory device. Simultaneous communication between the controller and the memory device on the set of signal lines uses a first band of frequencies, and...

20060140288 - System and method for transmission and reception of multicarrier data signals: Apparatus and method for transmitting information, utilizing a multicarrier waveform containing the information. The waveform presents symmetrically-shaped first and second sequential portions which are substantially equal in length. All subcarriers are restricted in phase values to 0 and π, or alternatively, π/2 and 3π/2. One, but not both, of the...

20060140290 - Training symbol format for adaptively power loaded mimo: Training symbol formats are provided for use in a MIMO based wireless communication system that uses adaptive power loading. In at least one embodiment, a training symbol format is used that is capable of enhancing training symbol signal to noise ratio (SNR)....

20060140299 - Qam symbol mapping method and apparatus for downstream transmission of a cable modem: Provided is a QAM (Quadrature Amplitude Modulation) symbol mapping method and apparatus for downstream transmission of a cable modem. The method includes the steps of: determining phase information on the basis of predetermined relations between two bits representing set partitioning information and two LSBs (Least Significant Bits) of bits representing...

20060140300 - Wireless communication device: A first bit estimate value for a first data stream is determined from a signal y0 received by a first antenna, and a second bit estimate value for the first data stream is determined from a signal y1 received by a second antenna; these are synthesized to determine a synthesized...

20060140301 - E8-vsb reception system, apparatus for generating data attribute and method thereof, and apparatus for channel encoding and method thereof: An E8-VSB reception system, apparatus for generating data attribute and method thereof, and apparatus for channel encoding and method thereof are disclosed. In the present invention, E8-VSB data resulting from multiplexing a plurality of enhanced data encoded at different coding rates with main data is received. And, the main data...

20060140302 - Reception of a signal modulated according to a multilevel coding technique: A method for receiving a signal modulated according to a multilevel coding technique, comprising at least two coding levels each having different noise robustness, said signal including a plurality of symbols each comprising at least one bit, assigned to one of said coding levels, said method comprising at least one...

20060140304 - Generalized recursive space-time trellis code encoder: Provided is a generalized Recursive STTC (Space-Time Trellis Code) encoder which can improve diversity gain and coding gain in terms of transmission without increasing circuit complexity in a transmission system by forming an internal encoder of a multi-antenna mobile telecommunication system using a Recursive Systematic Convolutional code (RSC) block having...

20060140303 - Wireless communication method and apparatus: In transmitting a wireless packet signal for channel response estimation, after AGC preambles and channel estimation preambles are transmitted by using a plurality of antennas, at least one data stream is transmitted, as subcarriers distributed to the plurality of antennas, by using the plurality of antennas....

20060140305 - Method and apparatus for adaptive modulation of wireless communication signals: A block edge detector (310) determines (510) whether a wireless communication transmission with a first modulation having excess spectral emissions will be transmitted at a frequency on a block edge (120). In response, a modulator selector (320) changes (530) the wireless communication transmission to a second modulation with lessened spectral...

20060140306 - Analog-to-digital converter with a decision circuit and an optimized decision threshold: The device includes a decision circuit (6a) for providing, by comparing the amplitude of a received modulated signal (Sr) to a decision threshold (Vth, Th), a binary signal (Sb) with two states respectively representing first and second binary values that respectively correspond to low and high values of the received...

20060140307 - Multi-symbol noncoherent cpm detector: Two receivers are presented for the general case of noncoherent detection of multi-h continuous phase modulation. Both receivers yield performance gains using multi-symbol observations. The first is an existing receiver which has previously been applied to PCM/FM and is now applied to the Advanced Range Telemetry Tier II waveform. The...

20060140308 - Carrier tracking circuit and method including dual numerically controlled oscillators and feedforward phase correction coefficient: A carrier tracking circuit includes a first phase adjustment circuit coupled to an input of a delay element and a second phase adjustment circuit coupled to an output of the delay element. A phase correction circuit is coupled to output of the delay element is operable to generate a phase...

20060140309 - Clock and data recovery circuits: A clock and data recovery circuit comprising a phase detection circuit, first and second oscillators, and a flip-flop. The phase detection circuit outputs a detection signal according to a significant transition of an input signal. Each oscillator receives the detection signal and operates alternately in a clock and data recovery...

20060140310 - Device and method for wireless communication and computer program: Disclosed herein is a wireless communication device which includes an RF processing unit and a baseband unit that carries out carrier tracking based on a signal after RF processing, in which the device includes: a phase error measuring means that measures a phase error estimation value composed of the phase...

20060140312 - Blind snr estimation: A method for estimating the signal to noise ratio (=SNR) of a modulated communication signal including a data symbol component and a noise component is characterized in that an intermediate SNR value of the modulated communication signal is derived from a data assisted maximum-likelihood estimation, the assisting data not being...

20060140311 - Composite data detector and a method for detecting data: A composite data detector having first and second data detectors. The second detector of the invention starts in a known state and only runs as long as is necessary before being switched off and handing control back over to the smaller detector. Therefore, the composite data detector of the invention...

20060140313 - Error correction decoding, communication apparatus, and digital transmission system: An error correction decoding method using a correlating decoding technique is provided. The method includes the steps of estimating a decoding reliability of a decoding result using one or more correlation values acquired in a correlating process; and correcting the decoding result according to the decoding reliability....

20060140314 - Signal acquisition apparatus and method for reducing false alarm rate: A signal acquisition apparatus and method for reducing a false alarm rate are disclosed. The apparatus includes a comparator for detecting a first peak by comparing a correlation value of a received signal with a first threshold and detecting second peaks in a sample interval of the detected first peak...

20060140315 - Dual band wlan communication frequency synthesizer technique: A dual band WLAN (Wireless Local Area Network) communications technique is provided where a frequency synthesizer unit generates an LO (Local Oscillator) signal at a frequency between both frequency bands and two downconversion units and/or two upconversion units are provided. One of the units performs conversion between the LO signal...

20060140316 - Method for suppressing narrowband noise in a wideband communication system: This invention is used in communications, for example, in expanded signal spectrum broadband communication systems. The technical effect of this invention consists in an enhanced narrow-band interference suppression factor and almost complete elimination of the effect displayed by a powerful narrow-band interference or a group of narrow-band interferences in a...

20060140317 - Clock synchronization circuit: A clock synchronization circuit for synchronizing a first clock signal (Φ1) and a second clock signal (Φ2) for data transfer from a first function block (2), which is clocked by the first clock signal (ΦD) at a relatively high clock frequency (fΦ1), to a second function block (3), which is...

20060140318 - Amplitude monitor for high-speed signals: A serial communication system includes a receiver that incorporates an amplitude monitor, which may be used to set and maintain appropriate termination-resistance values and transmit pre-emphasis and receive equalization settings. The amplitude monitor can note the presence or absence of input signals, as is required by some communication standards, such...

20060140319 - Calibrating a phase detector and analog-to-digital converter offset and gain: The present invention includes apparatus and methods to calibrate a phase detector and an analog-to-digital converter (ADC) offset and gain. In one such embodiment, an apparatus includes a phase detector to generate an error pulse and a reference pulse, a combiner to combine the pulses, and an ADC to receive...

20060140322 - Circuit and method for dynamically adjusting a filter bandwidth: A tracking circuit (100) is provided for controlling a locally-generated clock. A receive channel (110) in the tracking circuit receives an incoming signal and a local clock, generates a local signal based on the local clock, and compares the local signal and the incoming signal to generate a data signal...

20060140324 - Clock recovery apparatus, method, and system: A global clock recovery circuit and port circuit determine and combine static phase adjustment information and dynamic phase adjustment information for multiple data signals. Static phase adjustment information is determined for each of the multiple data signals, and dynamic phase adjustment information is determined in common for the multiple data...

20060140325 - Integrated cmos clock generator with a self-biased phase locked loop circuit: An integrated CMOS clock generator with a self-biased phase locked loop circuit comprises a phase-frequency detector with a reference signal input, a feedback signal input and an output. A first charge pump of the clock generator has an input connected to the output of the phase-frequency detector and an output...

20060140320 - Mechanism to adjust a clock signal based on embedded clock information: An apparatus and method to improve bandwidth and reduce phase error in a tracking receiver is presented. According to one embodiment, an apparatus is presented comprising a phase comparator to generate indications based on a phase of a local clock signal and transitions in a stream of received data, an...

20060140321 - Processor-controlled clock-data recovery: A processor-controlled clock-data recovery (CDR) system. Phase error signals having either a first state or a second state are generated within the CDR system according to whether a first clock signal leads or lags transitions of a data signal. A difference value is generated based on the phase error signals,...

20060140323 - Reducing phase offsets in a phase detector: In one embodiment, the present invention includes a system having an amplifier to receive an incoming signal and a recovery circuit coupled to the amplifier that includes a phase detector to adjust a phase of a sampling clock via a signal indicative of a difference between transitions occurring between the...

20060133453 - Data transfer system: The present invention provides a data transfer system that performs a data transfer between a master receiver and at least one slave receiver each of which has a built-in memory storing data therein and is identical in configuration. Upon the data transfer, such at least one slave receiver in which...

20060133452 - Time domain spreading method and apparatus: A time domain spreading method and apparatus for a UWB receiver are provided. Wherein, a series of received symbol signals are received by the UWB receiver, and transformed by the fast Fourier transform to obtain a series of transformed signals Y(m) according to one of the received symbol signals. Y(m)=Y1(m)+jYQ(m),...

20060133451 - Use of pseudo-random frequency sequence to reduce pico-net interference in a multi-band uwb network: A wireless communication system and method is provided that uses a pseudo-random frequency sequence to reduce pico-net interference in a multi-band ultra wideband network. Pulse are transmitted using a pseudo-random sequence of frequencies such that neighboring pico-nets using the same technique can reduce band overlap thereby reducing mutual interference....

20060133454 - Wide band interoperable peer to peer wireless systems: Intersil HFA processors are used to form peer to peer communications between IEDs in an electric power substation as well as between any IED and a substation access port. IEDs are identified by an 9 bit station identification code for up to 255 IED and a final 9 bit code...

20060133455 - Multiple modulation technique for use in a communication system: A method for receiving an indication to apply a first modulation scheme to modulate one or more segments of the first portion; determining a first segment set, having at least one segment of the first portion for applying said first modulation scheme; modulating said first segment set of the first...

20060133457 - Channel estimator with extended channel bandwidth: A method (1700) and apparatus (1801) provide channel estimation with extended bandwidth filters. Antenna (1813) receives a signal such as a pilot signal and detects a bandwidth associated with the pilot signal in a detector (320). One of a plurality of filters (603, 605, 607, and 609) including extended bandwidth...

20060133456 - Memory based devcie and method for channel estimation in a digital communication receiver: A spread spectrum digital communication receiver, of the type comprising an input memory buffer (16) for storing samples of an input signal (y(k)) and a code generator circuit (30) for generating a re-generated user code, incorporates a device (24) for the estimation of a channel delay profile comprises: a basic...

20060133459 - Method for receiving spectrum spreading signals with frequency shift correction: Method for receiving spectrum spreading signals with frequency shift correction. According to the invention, the modulation period related to the Doppler effect is estimated by using a preamble and a correction signal is elaborated, the signal transmitting the information is then corrected by this correction signal. Base band digital signals...

20060133458 - Receiving equipment, receiving method and program thereof: A receiving equipment adjusts a path search window width in path search processing according to the saved timing information, after saving a timing information detected at the time of cell search processing. A Radio Frequency (RF) unit receives signals which are sent from a base station and transmitted via a...

20060133460 - Method and device for fine synchronization of a digital telecommunication receiver: A method for the synchronization of a digital telecommunication receiver comprises the steps of:—storing a plurality of consecutive samples E−1, B, M, 1, L+1 of an incoming spread spectrum signal in a delay line 56;—determining by interpolation between consecutive samples of the incoming spread spectrum signal, by means of a...

20060133464 - Acquisition circuit for low chip rate option for mobile telecommunication system: A User Equipment (UE) has a circuit that performs the acquisition for the low chip rate option of the Universal Mobile Telecommunication System (UMTS) Time Division Duplex (TDD) standard as formulated by the Third Generation Partnership Project (3GPP). The present invention implements the detection of the basic SYNC code; the...

20060133463 - Determination of a code phase: The invention relates to determining a correct code phase of a received, code modulated carrier signal using a correlation portion, a frequency compensation portion, a coherent memory and a non-coherent memory. In order to compensate for a code Doppler effect and/or a carrier Doppler drift effect, a mapping portion maps...

20060133461 - Method and apparatus for processing signals for ranging applications: The present invention is related to a method and apparatus for processing a signal sent by a transmitter to a receiver, in particular for ranging applications. The signal is typically sent by a satellite, and comprises a carrier signal, modulated by at least one pseudo random noise code and a...

20060133462 - Weighted autocorrelation method for downlink cdma lmmse equalizers: Receiving downlink CDMA signals in a fast-fading environment is facilitated at higher receiver velocities by updating the block-adaptive linear minimum mean square error (LMMSE) downlink CDMA equalizer. The autocorrelation matrix of the observed data is updated by passing block-wise autocorrelation slides through a filter. Each autocorrelation slide is an autocorrelation...

20060133465 - Wireless home repeater for satellite radio products: A system for receiving a satellite digital radio signal, the system comprising: a repeater having a unibody housing and an antenna disposed within the housing, the antenna being configured for receiving the satellite digital radio signal; a repeater circuit for receiving the satellite digital radio signal of the antenna, the...

20060133466 - Pleisiochronous repeater system and components thereof: A pleisiochronous repeater system and components thereof are disclosed. In one particular exemplary embodiment, a pleisiochronous repeater system component may be realized as a receiver circuit comprising a clock multiplier that multiplies a reference clock signal by an integer multiple to generate a data clock signal. The receiver circuit may...

20060133467 - Method and apparatus for generating a periodic training signal: In a method for generating a periodic training signal comprising cyclically expanded training symbols for a transceiver which transmits data via a data transmission channel using a predetermined number N of modulated carrier signals an address pointer for addressing a starting address in a memory is calculated for each training...

20060133468 - Bit error rate tester and pseudo random bit sequences generator thereof: A bit error rate tester and a pseudo random bit sequences (PRBS) generator thereof are provided. The bit error rate tester includes a transmitter PRBS generator, a master PRBS generator, a slave PRBS generator, a comparator, and a counting unit. The transmitter PRBS generator generates a parallel N-bit (N is...

20060133469 - Two-window recovered clock jitter analysis: Jitter in a clock signal is evaluated. A period of the clock is recovered from the clock signal in a first window, and the clock signal is evaluated for jitter within a second window that is smaller than the first window and located within the first window....

20060133471 - Coefficient update circuit, adaptive equalizer including the coefficient update circuit, and coefficient update method of the adaptive equalizer: A coefficient update circuit, an adaptive equalizer including the coefficient update circuit, and a coefficient update method of the adaptive equalizer are provided. The coefficient circuit includes: an error level detector, which detects the level of an error signal that is a difference between the level of an output signal...

20060133470 - Method and system of nonlinear signal processing: A nonlinear equalizer for treating the nonlinear component of a distorted digital signal includes a first processing unit adapted to receive the distorted digital signal and yield an appropriate output signal in response thereto, a second processing unit adapted to receive the distorted digital signal and yield an appropriate output...

20060133476 - Digital in-car video surveillance system: A digital video surveillance system includes a video server in a law enforcement vehicle which allows recording to digital optical media including DVD RAM disks, a removable hard disk drive, and other media such as compact flash memory. Shock-mounting and environmental assistance may be provided. The system includes a memory...

20060133474 - Encoder and its method: An encoding apparatus adds delay time information DTI indicating initial delay time i_d and delay time d of each group data to a position to be read prior to frame data by a decoding apparatus in the group data of encoding stream data DBI and transmits the same to the...

20060133473 - Method and apparatus for storing or transmitting coding parameters separately from coded audio-visual data: Compression parameter sets are stored in files separate from the main AV or transmitted separately and prior to any subsequent transmission of AV data. The scope of parameter set identifiers is limited to not more than a Program Chain. Either existing files are extended by including the compression parameter sets...

20060133477 - Combined video decoder and watermark creator: A method and apparatus that inserts watermark signal into decoded video pictures where the watermark creation function is combined with the video decoder and makes use of compressed domain information to create a perceptually adaptive watermark signal....

20060133481 - Image coding control method and device: Image coding having high coding efficiency is provided with a small computational complexity by properly determining a prediction mode and a quantization parameter. When an image is coded by a prediction mode selected from plural prediction modes every any coding unit, an undetermined multiplier λ is first calculated from a...

20060133479 - Method and apparatus for generating a quantisation matrix that can be used for encoding an image or a picture sequence: A significant data rate reduction effect in video coding is acchieved by quantizing the transformed frequency coefficients or components of a pixel block so that thereafter fewer amplitude levels need to be encoded and part of the quantised amplitude values becomes zero and need not be encoded as quantised amplitude...

20060133478 - System and method for performing optimized quantization via quantization re-scaling: A method, system, and program product for quantizing discrete cosine transform coefficients, e.g., for MPEG compression, with minimal bit rate overhead and without using a quantization matrix. This is done by scaling a uniform quantization parameter for the entire discrete cosine transform block, defining a variety of thresholds for the...

20060133480 - System and method for video encoding: The present invention discloses a video encoding method and system for encoding a video sequence. The video sequence includes N sub-sequences which each includes a plurality of frames. When the present invention encodes the jth frame in the ith sub-sequence of the video sequence, the frames previous to the jth...

20060133484 - Method for decoding image block: Disclosed is a method for decoding an image block. The method comprises a step of decoding an image block of a first layer based on a corresponding block of a second layer encoded with an intra mode, wherein a first area is formed with pixels, which are adjacent to a...

20060133483 - Method for encoding and decoding video signal: Disclosed is a method for scalably encoding and decoding a video signal. An enhanced layer having a higher spatial resolution is predicted and encoded based on an enhanced layer having a relatively lower spatial resolution. Then, the encoded enhanced layer is decoded, thereby improving a coding efficiency....

20060133485 - Method for encoding and decoding video signal: Disclosed is a method for encoding a decoding a video signal. In the procedure of encoding the video signal, when a frame temporarily simultaneous with a frame including a macro block of an enhanced layer which will obtain a prediction video does not exist in a base layer, the macro...

20060133482 - Method for scalably encoding and decoding video signal: A method for scalably encoding and decoding a video signal is provided. If a frame temporally coincident with a current frame in an enhanced layer including a target macroblock is not present (i.e., if there is a missing base layer frame) in a base layer when the target macroblock is...

20060133472 - Spatial scalable compression: A method and apparatus for providing spatial scalable compression of a video stream is disclosed. The video stream is downsampled to reduce the resolution of the video stream. The downsampled video stream is encoded to produce a base stream. The base stream is decoded and upconverted to produce a reconstructed...

20060133475 - Video coding: A method and apparatus for providing spatial scalable compression of an input video stream is disclosed. A base stream is encoded which comprises base features. A residual signal is encoded to produce an enhancement stream comprising enhancement features, wherein the residual signal is the difference between original frames of the...

20060133490 - Apparatus and method of encoding moving picture: Provided are an apparatus and method of encoding a moving picture. An input original video signal is delayed and stored in a memory as a video signal for motion estimation (a video signal of a previous frame). Then, a motion estimation is performed using a video signal of a current...

20060133487 - High efficiency encoder and video information recording/reproducing apparatus: In a high-efficiency encoder which performs motion-compensation prediction, an intra-field is set every n fields. The presence of a scene change is detected. When a scene change occurs, a reference picture of motion-compensation prediction is switched, or the field immediately after the scene change is set as an intra-field....

20060133486 - Implicit weighting of reference pictures in a video decoder: A video decoder, encoder, and corresponding methods for processing video signal data for an image block with two reference picture indices to predict the image block are disclosed that utilize implicit weighting of reference pictures to enhance video compression, where a decoder includes an implicit reference picture weighting factor unit...

20060133488 - Method for encoding and decoding video signal: A method for encoding and decoding a video signal in a scalable Motion Compensated Temporal Filtering (MCTF) scheme is provided. A video signal is encoded by adaptively weighting reference pictures of a current frame based on temporal positions of the reference pictures relative to the current frame in MCTF prediction...

20060133489 - Moving picture compression encoding method, apparatus and program: Disclosed are an apparatus and method that make possible high-speed mode selection using an evaluation standard of high encoding efficiency in intra prediction. The apparatus includes a first cost calculator for generating cost values from difference information indicative of differences between prediction signals, which have been generated by a prediction...

20060133491 - Video codec: A video codec is provided. A coded first frame image is decoded and stored. A second frame is coded by referring to the decoded first frame image. The second frame image is not used as a reference image. For this purpose, the second frame image does not pass through a...

20060133504 - Deblocking filters for performing horizontal and vertical filtering of video data simultaneously and methods of operating the same: A deblocking filter includes a current macroblock buffer memory configured to store video data of a current macroblock to be filtered, a side macroblock buffer memory configured to store a portion of video data of neighboring macroblocks located on the side of the current macroblock, a register buffer array configured...

20060133494 - Image decoder with context-based parameter buffer: According to some embodiments, a first value of a first parameter type is received in connection with a macroblock that represents a portion of an image. The macroblock may be divided into a first set of sub-portions, and different values of the first parameter type may be associated with different...

20060133500 - Image down-sampling transcoding method and device: Provided are method and device for down-sampling an image from H.264 to MPEG-4 at a high speed. The image down-sampling transcoding method for converting a first macro block having a first format into a second macro block having a second format includes: (a) determining a block mode of the second...

20060133502 - Image down-sampling transcoding method and device: In an image down-sampling transcoding method, by reducing an MPEG SP (simple profile) video bit stream having a CIF (Common Intermediate Format) size into a half in image size in a pixel domain, the video bit stream is converted into a H.264 BP (Baseline Profile) video stream having a QCIF...

20060133492 - Implicit weighting of reference pictures in a video encoder: A video decoder, encoder, and corresponding methods for processing video signal data for an image block with two reference picture indices to predict the image block are disclosed that utilize implicit weighting of reference pictures to enhance video compression, where a decoder includes an implicit reference picture weighting factor unit...

20060133498 - Method and apparatus for deriving motion vectors of macroblocks from motion vectors of pictures of base layer when encoding/decoding video signal: A method and apparatus for encoding video signals using motion vectors of predictive image frames of an auxiliary layer and decoding such encoded video data is provided. Video signal is encoded in scalable MCTF scheme to output an enhanced layer (EL) bitstream and encoded in another specified scheme to output...

20060133493 - Method and apparatus for encoding and decoding stereoscopic video: Stereoscopic video is encoded and decoded by using the MAC defined by the existing MPEG-4 standard. The stereoscopic video is divided into one image as a single video object, and another image as auxiliary information for the image established as the video object. The auxiliary information includes a horizontal disparity...

20060133499 - Method and apparatus for encoding video signal using previous picture already converted into h picture as reference picture of current picture and method and apparatus for decoding such encoded video signal: A method and apparatus for encoding/decoding a video signal according to an MCTF coding scheme is provided. Not only pictures, which are to be converted into L pictures, but also pictures, which are to be converted into H pictures, at the current temporal decomposition level are used as candidates for...

20060133497 - Method and apparatus for encoding/decoding video signal using motion vectors of pictures at different temporal decomposition level: A method and apparatus for encoding/decoding a video signal according to a scalable MCTF coding scheme is provided. When a video signal is encoded through a temporal decomposition procedure, information regarding a motion vector of an image block in an H frame in a frame sequence belonging to level L...

20060133503 - Method for scalably encoding and decoding video signal: Disclosed is a method for scalably encoding and decoding a video signal. The video signal is encoded through an inter-layer prediction scheme based on a data stream of a base layer encoded with ×¼ resolution. The inter-layer prediction scheme applied between the enhanced layer and the base layer representing ×4...

20060133501 - Motion estimation and compensation method and device adaptive to change in illumination: Provided are a motion estimation device and method adaptive to change in illumination. The motion estimation method includes the steps of: generating a current frame pattern block for a current frame block and a reference frame pattern block for a reference frame block; calculating the sum of absolute differences (SAD)...

20060133496 - Motion estimation method for an adaptive dynamic search range: A motion estimation method for an adaptive dynamic search range is provided to solve the problems of reading a large quantity of reference frame data for a search and having an insufficient bandwidth of the dynamic random access memory. The invention uses a component of a motion estimation vector of...

20060133505 - Moving-picture compression encoding method, apparatus and program: Disclosed are a moving-picture compression encoding apparatus comprising a motion-compensated predicting unit that includes a first cost calculator for generating cost values based upon difference information indicative of differences between prediction signals generated by a prediction signal generator and a moving-picture signal input to the moving-picture compression encoding apparatus; a...

20060133495 - Temporal error concealment for video communications: Methods and systems for processing video data are described. A set of candidate motion vectors is selected from motion vectors associated with macroblocks in a first frame of video data and from motion vectors associated with macroblocks in a second frame of the video data. A statistical measure of the...

20060133506 - Method and system for fast implementation of subpixel interpolation: A subpixel interpolator includes an input memory capable of storing video information formed from full pixels. The subpixel interpolator also includes at least one interpolation unit capable of performing subpixel interpolation to generate half-pixels and quarter-pixels in parallel. Multiple half-pixels and multiple quarter-pixels are generated concurrently during the subpixel interpolation....

20060133507 - Picture information decoding method and picture information encoding method: A picture information decoding method enables to switch a pixel precisions of a motion vector while compatibility with conventional standard is maintained and a delay occurred in parsing a picture parameter set is prevented, and it is judged whether or not a half_pixel_mv_flag indicating the pixel precision of the motion...

20060133508 - Video encoder, video decoder, video encoding method, video decoding method, and video encoding and decoding system: A method and a video decoder for decoding an encoded bitstream of video data in a picture encoding and decoding system are disclosed. The video decoder includes a motion compensation unit for calculating a position for a sample image portion using an encoded bitstream of video data having a motion...

20060133509 - Methods of selecting an encoding mode: Information needed to generate an encoded version of a matrix of j transform coefficients c0 . . . cj−1 representing a block of digital video data is determined by forming a numerical signature σ of the matrix and looking up a value for the information needed in an array employing...

20060133510 - Local macroblock information buffer: According to some embodiments, an external memory unit stores rows of macroblocks representing an image. A set of macroblocks may be transferred from the external memory unit to a local buffer, the set of macroblocks including fewer macroblocks than a row. A macroblock may then be decoded based on information...

20060133511 - Method to speed up the mode decision of video coding: This invention provides a method to speed up mode decision in video coding standards. It is based on the characteristics of mode distribution and the relationship among the modes of neighboring blocks. It compares the main steps of checking SKIP mode, checking if neighboring blocks have a same mode, checking...

20060133512 - Video decoder and associated methods of operation: A video decoder and associated methods of operation are disclosed. The video decoder identifies groups of successive not-coded macro-blocks associated with a current frame in a bitstream of compressed video data received from a main memory. The video decoder then reads corresponding groups of macro-blocks associated with a previous frame...

20060133513 - Method for processing multimedia streams: A method, machine readable medium, system, and device are disclosed. In one embodiment the method comprises determining whether one or more components that comprise a multimedia stream require real-time processing, if at least one of the one or more components require real-time processing, assigning the one or more components that...

20060133514 - Video coding and transmission: A system and method for compensating for transmission errors in a video data stream comprises transmitting a first video data stream from a transmitter to a receiver, detecting corrupted data in the transmitted data stream, and generating an indication that data is corrupted. In response to the indication that the...

20060133515 - System, method, and apparatus for determining presentation time for picture without presentation time stamp: Presented herein are system(s), method(s), and apparatus for determining the presentation time for a picture without a presentation time stamp. A first and second picture are decoded. The first picture is a reference picture for the second picture. The presentation time for the second pictures is computed as a function...

20060133516 - Method of coding data and transmitter: e

20060133517 - Method and apparatus for variable sigma-delta modulation: A method and apparatus for modulating a digital input signal is disclosed. The digital input signal is partitioned into a less-significant bit signal and a more-significant bit signal. A lower-order modulation of the less-significant bit signal is performed to generate an intermediate output signal. The intermediate output signal is appended...

20060133518 - Methods for providing communications services: Methods, systems, and products are disclosed for providing communications services. A first physical medium and a second physical medium are logically bonded. Those logically bonded physical mediums are then associated in a database....

20060133529 - Apparatus and method for performing time domain channel estimation in a communication system: In an orthogonal frequency division multiplexing (OFDM) system, channel estimates of pilot subcarriers in a current input symbol are input, and time domain channel estimation for data subcarriers positioned between adjacent pilot subcarriers is performed by linear interpolating channel estimates of the adjacent pilot subcarriers associated with each of the...

20060133522 - Mc-cdma multiplexing in an orthogonal uplink: Techniques are provided to support multi-carrier code division multiple access (MC-CDMA) in an orthogonal uplink of a wireless communication system. A method of wireless multi-carrier communications comprises dividing sub-carriers on an uplink into non-overlapping groups, allocating a time-frequency block including a hopping duration and a non-overlapped group, respectively, assigning a...

20060133519 - Method and system for providing window shaping for multiline transmission in a communications system: A method and system for providing window shaping for multiline transmission in a communications system are described. A last portion of a prefix symbol is extracted. A prefix with a prefix window is shaped to create a shaped prefix. A DMT symbol is shaped with a DMT window to create...

20060133526 - Method for joint time synchronization and frequency offset estimation in ofdm system and apparatus of the same: Embodiments of the present invention include a method for performing joint time synchronization and carrier frequency offset estimation in a wireless communication system, comprising steps of: on a transmitter: performing frequency domain spreading and interleaving on input data by using a predetermined spreading factor (SF) to generate a frequency domain...

20060133520 - Method of modulation and demodulation of a digital signal, in particular in a frequency band affected by flat fading, associated modulator and demodulator: A method of modulating a digital signal of width L in frequency on a given useful frequency band is described The digital signal is separated into N blocks bn (1≦n≦N). The given useful frequency band is split into N contiguous parts Pn. Channels Cn, of width ln in frequency, lying...

20060133523 - Multi-tone system with oversampled precoders: A multi-tone system includes a data transmission circuit with an interface for receiving a data stream for transmission, a data steam splitter that splits the data stream to produce multiple substreams and a plurality of parallel data preparation circuits. Each data preparation circuit prepares a respective substream for transmission and...

20060133524 - Multicarrier signal transmission apparatus, multicarrier signal receiving apparatus, multicarrier signal transmission method, multicarrier signal receiving method, and communication system: A multicarrier signal transmission apparatus able to adjust the balance between the quality of reception and generation of an out-band spurious wave by a simple configuration, comprising a peak detector for detecting a peak part of a transmitted multicarrier signal, a window function generator for generating a window function of...

20060133521 - Performance based rank prediction for mimo design: The performance of a Single Code Word (SCW) design with low complexity MMSE receiver & rank prediction is similar to the Multiple Code Word (MCW) design with successive interference cancellation (SIC). A method of rank prediction comprises calculating MIMO channel matrices corresponding to layer transmissions for each tone, calculating signal-to-noise...

20060133528 - Receiver and communication method for digital multi-carrier communication: A receiving apparatus and receiving method employ a digital multi-carrier transmission technique utilizing a real coefficient wavelet filter bank in digital demodulation. The receiving apparatus may include a memory configured to store received waveform data corresponding to 2K symbols or more and a wavelet transformer configured to perform a wavelet...

20060133527 - Residual frequency, phase, timing offset and signal amplitude variation tracking apparatus and methods for ofdm systems: An error tracking apparatus and method for tracking a residual frequency error, a phase error, a timing error, and a signal amplitude variation to enhance a phase error tracking performance and a tracking speed in an orthogonal frequency division multiplexing (OFDM) system is provided. The error tracking apparatus and method...

20060133525 - Symbol timing estimation in communication systems: A symbol timing estimation method is provided for use in a communication system, for example an orthogonal frequency division multiplexing system having a cyclic prefix extension CPE. Each symbol in a transmitted signal comprises N symbol samples, and the CPE has L symbol samples. The method comprises receiving the signal...

20060133531 - Communication system and transmitter-receiver for use therewith: To achieve the optimal power control of a system in an MIMO communication method. When decoding in accordance with a receiving algorithm of the MIMO communication method in plural receivers, each receiver acquires the reception power level of a received signal from a transmitter paired with the receiver, and generates...

20060133530 - Method and apparatus for combining space-frequency block coding, spatial multiplexing and beamforming in a mimo-ofdm system: A method and apparatus for combining space-frequency block coding (SFBC), spatial multiplexing (SM) and beamforming in a multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system. The system includes a transmitter with a plurality of transmit antennas and a receiver with a plurality of receive antennas. The transmitter generates at...

20060133532 - Hardware efficient fsk demodulator: A radio frequency (RF) transmitter includes a digital radio processor and a baseband processor. A complex analog-to-digital converter (ADC) within the radio processor provides an analog interface to the baseband processor to receive an analog complex modulated baseband signal and convert the analog complex modulated baseband signal to a digital...

20060133533 - Method and apparatus for using multiple modulation schemes for a single packet: Techniques for using multiple modulation schemes for a single packet are described. Each data packet is processed and transmitted in up to T blocks, where T>1. Multiple modulation schemes are used for the T blocks to achieve good performance. A transmitter encodes a data packet to generate code bits. The...

20060133534 - Method and apparatus for determining a transmit psd at a remote location: The present invention relates to a method for determining a transmit PSD over a remotely-deployed line, which method comprising the steps of: modeling a first far-end crosstalk originating from the line and coupling into a centrally-deployed victim neighboring line, modeling a second far-end crosstalk originating from a further centrally-deployed neighboring...

20060133535 - Apparatus and method for linearizing adaptive array antenna system: Disclosed is an apparatus and method for linearizing an adaptive array antenna system. The apparatus and method for linearizing an adaptive array antenna system uses an identical feedback path as feedback path for estimation of a transfer function and a feedback path for linearization of each transmission channel in a...

20060133536 - Power amplifier pre-distortion: A power amplifier pre-distorter is formed by a FIR filter structure that includes an individual look-up table (LUT0, LUT1, LUT2) for each filter tap, where each look-up table represents a sampled polynomial in a variable representing signal amplitude. An absolute value block (10) selects, from each filter tap look-up table,...

20060133537 - Orthogonal modulation device, method, program, recording medium, and modulation device: It is possible to calibrate an I(Q) signal without interrupting the modulation operation of an orthogonal modulation device. The orthogonal modulation device includes: an adder for outputting a pseudo noise superimposed signal obtained by adding the I(Q) signal to a pseudo noise PN; a signal conversion section for mixing the...

20060133538 - Adjustable dual-band link: A communication system utilizing an adjustable link has at least a first data transmission circuit including at least a first communication link circuit. The first communication link circuit has a baseband circuit and at least a passband circuit. The baseband circuit corresponds to a baseband sub-channel and the passband circuit...

20060133539 - Pseudo differential current mode receiver: A pseudo differential current mode receiver includes a regulated cascode buffer for buffering a received data current to generate a buffered data current with cascode-reduced input impedance and cascode-increased output impedance. In addition, a signal converter generates an output signal indicating a difference between the buffered data current and a...

20060133540 - Method and apparatus for reception of data over digital transmission link: An over-sampled sequence detector operates on sampled data and tracks the detection reliability of the sampled data. The detector separately analyzes sample sequences for different sampling phases and then picks a sample sequence that allows for the most reliable detection. For the different sampling phases, the detector inspects some amount...

20060133541 - Insertion phase variation compensation module and method of counteracting the effect of a phase offset introduced into a received signal: A communication system including an amplifier, a receiver, an analog to digital converter (ADC) and an insertion phase variation compensation module. The amplifier receives a communication signal. If the amplifier is enabled, the amplifier amplifies the communication signal and outputs the amplified communication signal to the receiver. If the amplifier...

20060133542 - Methods and apparatus for decoder selection in communication systems: Techniques for efficiently choosing a desired decoder in the presence of varying Doppler and/or mobility are disclosed. In one aspect, a method for selecting a filter for decoding forward-link (FL) information in a wireless communication network comprises the acts of decoding reverse-link (RL) information by a plurality of decoders, each...

20060133543 - Method and apparatus for performing channel assessment in a wireless communication system: A system and method for classifying channels in a frequency hopping wireless communication system is provided. A data collection engine operates to obtain channel metrics indicating the level of interference for each channel used by the wireless communication system. A data analysis engine operates to provide a channel map for...

20060133544 - Diversity receiver and diversity reception method: A diversity receiver comprises: a control section for generating an antenna selection signal such that a plurality of antennas are sequentially selected on a one-by-one basis; a plurality of correlation sections which correspond to the plurality of antennas on a one-to-one basis, each of the correlation sections determining a correlation...

20060133546 - Digital baseband receiver including a time domain compensation module for suppressing group delay variation distortion incurred due to analog low pass filter deficiencies: A digital baseband (DBB) radio frequency (RF) receiver used for receiving and processing a wireless communication signal. The DBB receiver includes a demodulator, first and second analog low pass filters (LPFs), first and second digital gain control circuits, and a digital time domain compensation module which removes group delay variation...

20060133545 - Method of automatically setting the gain of an interrogator receiver within a non-contacting identification system: An attack is activated in a receiver amplifier of an interrogator whenever an amplified input signal exceeds an attack threshold voltage value Vatt, and the receiver amplifier at least during a waiting period, the length of which preferrably equals the double length of the longest time interval between adjacent pulses...

20060133548 - Apparatus and method to calibrate amplitude and phase imbalance for communication receivers: The present invention provides apparatus and method for calibrating I/Q imbalance in a direct conversion transmitter-receiver, including generating a complex sinusoidal signal with a center frequency at ωi, sending the sinusoidal signal to the receiver and using FFT to estimate the I/Q the phase φ, the gain imbalance ε, and...

20060133547 - Method and corresponding arrangement for dc offset compensation using channel estimation: A method of determining a DC offset in a communications signal received via a communications channel, the communications signal comprising a sequence of training symbols. The method comprises providing a channel estimate of the communications channel based on said sequence of training symbols; determining, based on the channel estimate, an...

20060133549 - Robust multiple chain receiver: The present invention provides a method and system for receiving a plurality of transmission signals at a receiver, the transmission signals each traveling through a corresponding transmission channel. The receiver includes a plurality of receiver channels, a receiver channel corresponding to each transmission channel. Each receiver channel receives a corresponding...

20060133552 - Configurable all-digital coherent demodulator system for spread spectrum applications: A configurable all-digital coherent demodulator system for spread spectrum digital communications is disclosed herein. The demodulator system includes an extended and long code demodulator (ELCD) coupled to a traffic channel demodulator (TCD) and a parameter estimator (PE). The demodulator also includes a pilot assisted correction device (PACD) that is coupled...

20060133551 - Configurable filter and receiver incorporating same: An efficient configurable signal filter. The filter includes a first mechanism for receiving a first signal of a first type and a second signal of a second type. A second mechanism selectively filters the first signal during a first mode of operation, and filters the second signal during a second...

20060133550 - Receiver with chopper stabilization and method thereof: A receiver (202) has a down-conversion receiver (304) for transforming a signal (201) from a first operating frequency to a second operating frequency that is lower than the first operating frequency, and a receiver filter (308) with chopper stabilization for filtering unwanted portions of the signal (306) at the second...

20060133555 - Clock generation circuit and method thereof: The present invention generates an output clock signal CLKreq having a frequency freq between the frequency fref/A of a divided clock signal CKL1 and the frequency fref/(A+1) of a divided clock signal CLK2. A clock divider circuit selectively generates divided clock signals CLK1, CLK2. A discrete value correction circuit controls...

20060133553 - Method for automatically detecting the clock frequency of a system clock pulse for the configuration of a peripheral device: The present invention provides a method for automatic identification of the clock frequency of a system clock (15) for the configuration of a peripheral device (12), having the following steps: generation of a secondary clock (16) at a predetermined clock frequency; application of the system clock (15) and of the...

20060133554 - Methods and apparatus for efficiently synchronizing a transmitter and a receiver in a communication system: The disclosed embodiments provide methods and systems for synchronizing a transmitter and a receiver. In one embodiment, a method for synchronizing a transmitter and a receiver includes the transmitter performing a reset operation, and the receiver responding by performing a reset operation. In another embodiment, a method for synchronizing a...

20060133556 - Device, system and method for obtaining timing information and ranging: A system includes first (1) and one or more second devices (2). A first signal (61) and a second signal (62) are transmitted from the first (1) to second (2) device and a third signal (63) is transmitted from the second to the first device. The times of these signals...

20060133557 - Phase interpolator having a phase jump: A method and apparatus are disclosed for generating phase controlled data, based on a roaming tap interpolator. The present invention recognizes that roaming tap interpolators have inherent nonlinearities and discontinuities at the boundaries of each interpolation region. A roaming tap interpolator is disclosed that shifts the interpolation curve in time...

20060133558 - Mechanism to aid a phase interpolator in recovering a clock signal: According to one embodiment, a phase interpolator comprising an alternating current (AC) coupling capacitor, and a common mode bias keeper circuit coupled to the AC coupling capacitor is presented. In one embodiment, the AC coupling capacitor may be located between a mixer circuit and an amplifier within the phase interpolator,...

20060133559 - Programmable fractional n phase locked loop architecture and method: A fractional N phase locked loop (PLL) includes a programmable digital signal processor (DSP) to perform various processing functions within the PLL. In at least one embodiment, the programmable nature of the DSP allows programs to be modified and/or added to the PLL to support a variety of different applications....

20060126702 - Multimode receiver: An electric circuit suitable for use as a radio receiver or part of a radio receiver, the electric circuit comprising amplification means, frequency mixer means, and filter means, wherein the frequency mixer mans is configurable to down-convert a wanted component of the amplified input signal to one of at least...

20060126703 - Method of receiving spread spectrum signal, and receiver: A receiver for receiving a spread spectrum signal, including mechanisms for receiving a combination signal including a user signal spread with the user's spreading code, mechanisms for correlating the received combination signal for observing correlation between the user's spreading code and spreading codes used in the combination signal, mechanisms for...

20060126704 - System for estimating data using iterative fast fourier transform error correction: A system for estimating data from a received plurality of data signals in a code division multiple access communication system. The data signals are transmitted in a shared spectrum at substantially the same time. A receiver receives a combined signal of the transmitted data signals and a sampling device samples...

20060126705 - Method of processing multi-path signals: In the method of processing signals, multi-path signals are received, channel estimates for the received multi-path signals are determined, and a combining operation is applied to the multi-path signals, the combining operation being a function of a correlation matrix of the received multi-path signals, a correlation matrix of estimates for...

20060126706 - Auto-reboot modem: Various embodiments of systems, methods, and modems are provided. One embodiment is a modem comprising: means for detecting when the modem loses communication with a network; and means for automatically rebooting the modem a predetermined number of times until communication is re-established with the network....

20060126707 - Method and system for virtual exchange reference impact (veri) for use in mixed spectrum management in dsl: A method and apparatus implements a Virtual Exchange Reference Impact (VERI) technique to define a pattern to shape the spectrum of a cabinet deployed system to minimize its impact, e.g., FEXT, into an exchange deployed system while achieving effective cabinet system performance, e.g., in terms of data transmission rate. The...

20060126708 - Noise measurement method and a related receiving digital subscriber line modem: The present invention relates to a Noise measurement method and a related device for noise measurement in a Digital Subscriber Line transmission system. Such a system comprises a transmitting Digital Subscriber Line modem and a receiving Digital Subscriber Line modem where the transmitting Digital Subscriber Line modem is coupled over...

20060126709 - Vdsl transmission between two groups of modems: The transmission of data between two VDSL modems respectively belonging to two groups of a same number of modems connected two by two by lines of a same cable, including, for each carrier, the steps of determining a possible set of values according to the number of bits assigned to...

20060126710 - Method for measuring locking time and frequency error in rf receiver: A method is provided for measuring the locking time of an RF receiver. The method comprises inputting to the RF receiver an input sine wave with a certain frequency difference relative to the system operation frequency. An oscilloscope is used to capture the analog I and Q output signal of...

20060126711 - Method for transmitting an information of a mobile telecommunication system: Method for transmitting an information representative of the number of spreading codes allocated to the mobile stations in communication with a base station of a mobile telecommunication system, wherein it includes the step of: forming a word, said transmitted word, the content of which is representative of the number of...

20060126712 - Rate control protocol for long thin transmission channels: The invention deals with rate control protocols having a probing phase during which the sending rate of the transmitter is repeatedly increased until a loss is reported by the receiver. Such probing phases are used by the transmitter to quickly increase its sending rate to a fair share of the...

20060126713 - System and process for performing an exponentially weighted moving average on streaming data to establish a moving average bit rate: A system and process for performing an exponentially weighted moving average on streaming data to establish a moving average bit rate of data units is presented. In general, the system or process computes, on a unit-by-unit basis, the product of the moving average bit rate computed for a data unit...

20060126714 - Method and apparatus for measuring signal jitters: A measuring method for signal jitter comprises the following procedures: First, a first data signal is provided, and the first data signal is deemed equivalent to a second data signal, wherein frequency of the first data signal is a multiple (preferably odd) of that of the second data signal, and...

20060126715 - Apparatus and method for compensating signal attenuation based on an equalizer: An apparatus and a method for compensating signal attenuation based on an equalizer. The apparatus includes an auto gain controller, an analog-to-digital converter and an auto-gain-control mapping circuit. The analog-to-digital converter is used for receiving an incoming analog signal and amplifying the received analog signal. The analog-to-digital converter is used...

20060126716 - Digital remodulation: A method (30) of digital remodulation of a received or source signal using a digital audio radio (116) having a first digital radio frequency path (119 to 116) or using a first digital radio frequency comprises the steps of re-encoding (38) the received signal to provide a re-encoded digital signal,...