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Pulse Or Digital Communications > Receivers > Interference Or Noise Reduction Interference Or Noise ReductionInterference Or Noise Reduction patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.11/08/07 - 20070258549 - Impulsive noise suppresser and method thereof An impulsive noise suppresser and method thereof is provided. The impulsive noise suppresser includes an automatic gain control unit, variable gain amplification unit, impulsive detection unit and impulsive suppression unit. The automatic gain control unit determines a gain value according to a PAPR. The variable gain amplification unit amplifies a ... 10/11/07 - 20070237271 - Adjustable noise suppression system Methods and corresponding systems for suppressing noise in an input signal include setting a minimum overall gain in a noise reduction processor for processing a first frame of data associated with the input signal. In response to a new minimum overall gain being set, the minimum overall gain in the ... 10/11/07 - 20070237270 - Techniques to converge and adapt a communication system receiver A system, apparatus, method and article to converge a communications system receiver are described. The apparatus may include an interference canceller to receive an interference signal and to produce an adaptive signal. The interference canceller is adapted by a first adaptation module. An equalizer is coupled to the interference canceller. ... 09/06/07 - 20070206710 - Signal processing apparatus and a signal storage system In general, circuit scale in a DAE is large. The proposed DAE includes First multipliers (400 to 418), Unit processing circuits (420 to 430) and Combined circuits (432 and 434). First multipliers (400 to 418) use temporary estimated values (x0 to x9) to respectively compute signals (u0 to u9). Unit ... 08/30/07 - 20070201588 - Supressing interference for wireless reception and improvements relating to processing a frequency shift keyed signal A communications receiver may include an adaptive filter unit for removing coherent interference components from a received signal. In the absence of a signal of interest, the filter may adapt dynamically to remove current interference components. When a signal of interest is detected, the filter may be controlled to stop ... 08/09/07 - 20070183544 - Apparatus and method for receiving a signal in a communication system In a communication system, information regarding a first modulation scheme applied to a frequency domain in a serving base station is received from the serving base station. A signal of the frequency domain is received. A second modulation scheme is set by estimating a modulation scheme applied to the frequency ... 08/09/07 - 20070183543 - Power line communication (plc) noise isolation device This invention is to reveal a kind of noise isolation device designed on the power plug. In particular, a kind of power line communication noise isolation device. The purpose is to filter noises existing in the power line using environment through the use of a filter circuit and, at the ... 07/26/07 - 20070172004 - Active noise controller An active noise controller can determine the signal transmission characteristics from the power amplifier and the speaker to the microphone without using any special external measuring instrument and calculate a cosine correction value and a sine correction value without using an external computer. The active noise controller uses the cosine ... 07/19/07 - 20070165754 - Method for avoiding interference from a cellular transmitter to the 2.4/5ghz ism band A method, terminal, and computer program are disclosed to reduce radio interference in a wireless communications device having a combination of a wireless telephone unit, such as a GSM cellular phone, and a short range wireless communications unit, such as a WLAN communications unit or a Bluetooth communications unit. An ... 07/19/07 - 20070165753 - Impulse noise remover and related method An impulse noise remover includes a delay chain, a plurality of detection modules coupled to the delay chain, a logic unit coupled to the detection modules, and a multiplexer coupled to the delay chain and the logic unit. The delay chain delays the input signal to generate a plurality of ... 07/19/07 - 20070165752 - Frequency compensated communications reception Frequency compensated communications reception includes compensating for frequency offset in a received signal by constructing a reference signal for comparison with a training sequence in a received signal. The reference signal is formed from basis functions and the training sequence. It is obtained by minimising a cost function J constructed ... 07/05/07 - 20070153945 - Dc offset correction for high gain complex filter A DC voltage offset correction circuit that provides for correction of a DC offset voltage of an output of a filter stage of a complex filter circuit includes a DC offset sensing device that is connected to an output of a filter stage of a complex filter to generate an ... 06/28/07 - 20070147558 - Method and apparatus for removing impulse noise An impulse noise remover includes: a storage module for storing a plurality of digital values derived from a received signal; a calculating module coupled to the storage module for calculating a first detection value according to a first subset of the plurality of digital values, and for calculating a second ... 06/14/07 - 20070133723 - Method and apparatus for cancellation of cross-talk signals using multi-dimensional coordination and vectored transmission The present invention relates to a method and an apparatus for cancellation of crosstalk signals using multi-dimensional coordination and vectored transmission. A method of canceling crosstalk signals in a receiver includes a step of multi-dimensionally decomposing the received signals into a user domain and a time domain, a step of ... 06/14/07 - 20070133722 - Multi-channel equalization to compensate for impairments introduced by interleaved devices A system includes a time-interleaved device. An equalizer effectively can apply different equalization to different interleaved channels. For convenience, these equalizers will be referred to as multi-channel equalizers. In one aspect, an apparatus includes an interleaved device having M interleaved channels, and a multi-channel equalizer coupled to the interleaved device. ... 06/14/07 - 20070133721 - Method and apparatus for phase-noise compensation in digital receivers A method and apparatus for compensation of noise in a received signal includes receiving a received signal comprised of a sum of a transmitted signal and a disturbance signal in a demodulator, summing the received signal and a compensation signal to produce a demodulation signal, determining a transmitted symbol based ... 06/07/07 - 20070127608 - Blind interference mitigation in a digital receiver A novel and useful apparatus for and method of Gaussian Minimum Shift Keying (GMSK) single antenna interference cancellation (SAIC) for use in a digital receiver. The invention comprises an interference mitigation module that treats the problem of GMSK SAIC in a blind manner. The interference mitigation mechanism is operative to ... 05/31/07 - 20070121767 - Serial transfer interface To provide a serial transfer interface for realizing a transmission of a stable and high-quality signal although there are characteristic variances due to an environment change and an LSI process, a serial transfer interface is provided at least with a signal waveform correction unit for correcting the distortion of a ... 05/31/07 - 20070121766 - Single antenna interference cancellation via complement subspace projection in spatial-temporal expansion of noise estimation Interference rejection in a wireless communication system involves determining a complement spatial-temporal signal subspace that is complement to a spatial-temporal signal subspace of an interference signal included in a received signal. The received signal is projected onto the complement spatial-temporal signal subspace, whereby the interference signal included in the received ... 05/10/07 - 20070104301 - Signal processing apparatus, signal processing method and storage system A signal processing apparatus includes a first baseline wander correcting unit, provided in a processing path in which a predetermined processing is performed on an input signal, which corrects baseline wander by a feedforward and a second baseline wander correcting unit, provided anterior to the first baseline wander unit, which ... 05/10/07 - 20070104300 - Signal processing apparatus, signal processing method and storage system A baseline wander correcting unit is provided in a processing path in which a predetermined processing is performed on an input signal. The baseline wander correcting unit includes a baseline wander derivation unit which derives an amount of wander of baseline of a signal on which the predetermined processing has ... 05/03/07 - 20070098121 - Methods and apparatus to provide communication protection technology for satellite earthstations An interference signal canceling system for communications protection is described for canceling interference signals from earth station received signals using a two input adaptive cancellation network. The present invention addresses terrestrial, co-channel and adjacent satellite interference sources resulting from emitting, isolated, frequency re-use and polarized sources. Main and auxiliary signals ... 05/03/07 - 20070098120 - Apparatus and methods for reducing channel estimation noise in a wireless transceiver Apparatus and methods for use in a wireless communication system are disclosed for reducing channel estimation noise in a device such as a wireless transceiver. A disclosed apparatus includes a processor that determines a channel activity portion and a noise portion of a channel estimation. The processor also determines a ... 04/26/07 - 20070092046 - Method of reducing interference among wireless network by intentionally violating the communication protocol A way of mitigating the interference among wireless devices that use the same media. This method is based on the assumption that all wireless devices are well-behaved devices in the sense that these devices exhibit the predictable behavior according to the wireless protocol specification. Based on this assumption, this invention ... 04/19/07 - 20070086548 - Method and apparatus for reducing dc offsets in a communication system Methods and apparatuses for reducing DC offsets in a communication system are described. In a first aspect, a feedback loop circuit reduces DC offset in a wireless local area network (WLAN) receiver channel. The frequency response of the feedback loop circuit can be variable. In a second aspect, a circuit ... 04/12/07 - 20070081616 - Dynamic dc offset removal apparatus and dynamic dc offset removal method A dynamic DC offset removal apparatus and a dynamic DC offset removal method capable of accurately estimating a change position of a dynamic DC offset and a DC offset value before the change and a DC offset value after the change, thereby carrying out equalization processing on a reception signal ... 04/05/07 - 20070076829 - Digital television transmitter and method of coding data in digital television transmitter A pre-processor pre-processes enhanced data packets by coding the enhanced data packets for forward error correction (FEC) and expanding the FEC-coded data packets. A data formatter adds first null data into first place holders within each pre-processed enhanced data packet. A first multiplexer multiplexes the main data packets with the ... 03/29/07 - 20070071146 - Methods and systems for obtaining data from networks of sources Methods and systems for obtaining data from a number of distributed sources. ... 03/29/07 - 20070071145 - Method and apparatus to correct channel quality indicator estimation Embodiments of the present invention provide a method and apparatus to correct channel quality indicator estimation with advanced receivers. Demonstrative embodiments of the invention include a receiver having an estimator to estimate a channel quality indicator value of a channel according to one or more estimated base values and a ... 03/22/07 - 20070064844 - Method to attenuate specific signal components within a data signal The present invention provides a method for attenuating specific signal components within a digital data signal. Such data components may include timing components such as pilot tones and their multiples. This process first receives a decoded data signal. A modulo processing operation, such as a multi-tapped integration, a leaky bucket ... 03/15/07 - 20070058760 - Apparatus and method for transmitting data in a communication system Disclosed are a data transmission apparatus and a data transmission method for preventing signal interferences from being caused by cross-talk between respective paths in a communication system configured in a mesh interface structure. There is provided a method for transmitting data through inter-module interfaces in a communication system in which ... 02/15/07 - 20070036248 - Frequency offset estimator A complex symbol sequence (13), which is a product of an orthogonally detected complex demodulated symbol sequence (1) and a conjugate complex number of a known symbol sequence (2), is applied to phase rotating units (4a, 4b, 4c) which change the phase of the complex symbol sequence (13) based on ... 02/08/07 - 20070030931 - Method of and apparatus for detecting impulsive noise, method of operating a demodulator, demodulator and radio receiver In a digital receiver for receiving COFDM modulated television signals or the like, consecutive samples are compared with a detection threshold and the number of samples having amplitudes greater than the threshold is determined. This is compared with a further threshold and, if the number of such samples exceeds the ... 02/08/07 - 20070030930 - Channel estimation and/or equalization using repeated adaptation A novel approach of repeated adaptation is provided that can be applied to either one or both of channel estimation and/or equalization. From an incoming data packet that includes data and a training sequence, a modified data packet is generated that includes the data, the training sequence, and at least ... 01/25/07 - 20070019763 - Sampling frequency offset estimation apparatus and method for ofdm system A sampling frequency offset estimation apparatus and method to be applied to an OFDM (orthogonal frequency division multiplexing) system are provided. The apparatus includes an ADC (analog-to-digital converter) sampling a received signal based on a predetermined sampling frequency; a FFT (Fast Fourier Transform) unit transforming the sampled received signal into ... 01/25/07 - 20070019762 - Interference cancellation method and communication terminal for the same A method for canceling interference in multimedia broadcasts and a communication terminal for the same are provided. The method and the communication terminal reduce interference caused by a pilot channel to improve the reception quality of broadcast signals. ... 01/11/07 - 20070009068 - Methods and apparatus for communicating using a dc tone Special DC tone treatment in a wireless communications system, e.g., an OFDM system, is discussed. In the downlink, a wireless terminal receiver introduces self-interference at the DC tone from the RF/baseband conversion. A base station every so often does not transmit on the downlink DC tone while continuing to transmit ... 01/11/07 - 20070009067 - Methods and apparatus for radio frequency interference reduction Techniques for reducing interference on radio frequencies due to processor frequencies which control a processor in wireless device are disclosed. A method for reducing interference on radio frequencies includes the steps of determining at least one radio frequency used in the wireless device and assigning an interference factor to a ... 01/04/07 - 20070002982 - Receiver and method of processing received data A receiver includes a channel estimator for estimating a channel impulse response of a radio channel; an equalizer for generating linear minimum mean-square error equalizer coefficients and providing an equalized signal to a correlator; an estimating unit for forming an initial estimate of received data elements on the basis of ... 01/04/07 - 20070002981 - Apparatus and method for sampling frequency offset estimation and correction in a wireless communication system A method is described for correcting sampling frequency offset (SFO) of a data packet in a communications system where carrier frequency (fc) and sampling frequency (fs) are driven by a common clock source. The method comprises, for each lth symbol in the data packet, estimating carrier frequency offset (CFO) in ... 01/04/07 - 20070002980 - Method for timing and sequence hypotheses selection A method and apparatus may estimate the channel and signal to noise ratio for each of N hypotheses in, for example, a modem or other device receiving data, and may select the hypothesis with the highest signal to noise ratio with a high probability and low computational complexity. ... 01/04/07 - 20070002979 - Iterative channel estimation using pilot signals A set of symbols is transmitted over a communication path affected by fading. The symbols are detected by determining a first channel estimate on the basis of pilot symbols (3) so as to provide first estimated symbols (6), and then determining a second channel estimate on the basis of the ... 12/28/06 - 20060291598 - Method and system for antenna interference cancellation A wireless communication system can comprise two or more antennas that interfere with one another via free space coupling, surface wave crosstalk, dielectric leakage, or other interference effect. The interference effect can produce an interference signal on one of the antennas. A cancellation device can suppress antenna interference by generating ... 12/28/06 - 20060291597 - Digital-signal-processing apparatus and method Digital-signal-processing apparatus has a ringing-suppression-coefficient-generating device that generates a ringing suppression coefficient according to an amount of ringing occurred at an input signal, and a ringing suppression device that generates a ringing suppression signal based on high-frequency component of the input signal and the ringing suppression coefficient and suppresses the ... 12/28/06 - 20060291596 - Method of estimating noise and interference covariance matrix, receiver and radio system The invention relates to a method of estimating a noise and interference covariance matrix and to a receiver. The method comprises: estimating an initial noise and interference covariance matrix on the basis of a received signal; reducing the impact of the background noise of the receiver from the initial noise ... 12/28/06 - 20060291595 - Communications channel symbol recovery by combining outputs at different decision delays A method and apparatus for communications channel symbol recovery that improves equalizer performance adds together the log-likelihood ratios (LLRs) of different decision delays rather than using LLRs corresponding only to a single decision delay. A low complexity method comprises, determining an initial coarse delay and a set of fine delays ... 12/28/06 - 20060291594 - Phase tracking for received signals using adaptive interpolation Phase trackers (7) for tracking phases of received data are provided with interpolators (20), error detectors (21,22), combiners (25) and indicator generators (26) for generating at least two streams of interpolated samples, for generating error signals per stream, and for generating an indicator signal for adjusting the interpolation, to avoid ... 12/07/06 - 20060274866 - Apparatus for suppressing burst noise and method thereof An apparatus performs burst noise detection and then reduce the interference of the burst noise by controlling an operation of an adaptive apparatus, such as an equalizer. It includes: an adaptive apparatus having multiple coefficients, processing incoming signals according to these coefficients, and employing an error estimator to update the ... 11/30/06 - 20060269021 - Method and system for fm interference detection and mitigation Methods and systems for processing signals are provided and may include removing a DC component from a signal envelope comprising a combined signal within a range of allocated FM channels to generate a modified signal envelope. Fluctuation in power in the signal envelope may be detected based on a ratio ... 11/16/06 - 20060256898 - Ingress noise reduction in a digital receiver The invention provides a device (D2) for reducing ingress noise in a digital signal, comprising a noise predictor (20) for predicting an amount of ingress noise in the digital signal (sn) based on past samples of the ingress noise, and a subtractor (21) for subtracting the predicted amount of ingress ... 10/26/06 - 20060239389 - Frequency interference detection and correction A system for detecting and correcting for spurious frequencies that may coincide in a bandwidth of interest in an RF metrology system. The system can (1) utilize a deterministic scheme to detect an interference by a spurious frequency and correct the distortion effect or (2) utilize a mixed signal processing ... 10/26/06 - 20060239388 - Dc offset detection and cancellation in a receiver A DC offset detection and cancellation system for a receiver is disclosed. The DC offset detection and cancellation system comprises a downconverter configured to downconvert a received signal to a baseband level signal, the downconverted signal having a first sampling rate, a filter system configured to filter the downconverted received ... 10/19/06 - 20060233289 - Mixed direct-indirect adaptation procedure applied to receiver filter An adaptive procedure that optimizes the parameters of a receiver filter such as a Multiuser Detection (MUD) applied to Direct-Sequence Code Division Multiple Access (DS-CDMA) is disclosed. This procedure takes into account the constraints imposed by the absence of training data sequences sent by the transmitter and required to adapt ... 10/12/06 - 20060227910 - Receiver dc offset correction A system and method are provided for correcting direct current (dc) offset in a wireless communications receiver. The method disconnects the mixer signal input from a received communication signal in an initialization state. An analog signal is accepted from the mixer output and converted into digital signal. A fine correction ... 10/12/06 - 20060227909 - Optimal feedback weighting for soft-decision cancellers A receiver produces optimal weights for cancelling multipath interference. An SINR measurement module generates SINR measurements corresponding to soft symbol estimates produced by a baseband receiver from a received multipath signal. Each soft symbol estimate is replaced with either a hard estimate or a weighted soft estimate based on how ... 10/12/06 - 20060227908 - Advanced signal processors for interference cancellation in baseband receivers A multi-mode receiver includes a channel decomposition module (e.g., a Rake receiver) for separating a received signal into multipath components, an interference selector for selecting interfering paths and subchannels, a synthesizer for synthesizing interference signals from selected subchannel symbol estimates, and an interference canceller for cancelling selected interference in the ... 10/05/06 - 20060222119 - Channel estimation circuit and channel estimation method A channel estimation circuit (101) of the present invention includes: a tentative channel estimation unit (102) for performing channel estimation by making use of a received signal and outputting the result of estimation as a tentative channel estimation signal; a noise/interference power estimation unit (103) for estimating noise and interference ... 09/28/06 - 20060215795 - Interference cancellation of a narrow bank interferer in a wide band communication device Interference cancellation/suppression by a wide band radio (100) includes the steps of searching for all narrow band interferer signals such as Bluetooth signals (502). Communicating with the detected Bluetooth piconets (504). Estimating when the Bluetooth signals will occur (506) using the information received during step (504) . And using a ... 09/28/06 - 20060215794 - Minimizing non-deterministic noise by using wavelet transform A wavelet transform noise minimization circuit comprises a differential receiver, a voltage comparator, a wavelet transform circuit, an electrical idle (EI) detector circuit, a phase interpolator, a phase-locked-loop (PLL), and a reference clock buffer. The wavelet transform noise minimization circuit may be beneficially applied wherever there is non-deterministic (e.g., random) ... 09/21/06 - 20060210001 - Method and system for mitigating interference in communication system A method and system for mitigating interference in a communication system, comprising at least one base station and at least one terminal, are disclosed. The base stations and terminals communicate through a channel existing between them, and the channels include at least a first signal channel and a second signal ... 09/21/06 - 20060210000 - Communication system, communication unit and method of sharing a communication resource A wireless communication system (200) comprises one or more communication networks supporting communications for a plurality of communication units on a shared communication resource. An identification function (144) identifies interference within, or non-availability of, a portion of the shared resource; and a communication adaptation function (142), responsive to a resource-responsible ... 09/21/06 - 20060209999 - Interference detection in a wireless communication system A receiver and a method are applied in a wireless communication system for detecting interference with a coexisting radar system. A signal received from an antenna (100) is fed through an analog part (200) and a subsequent digital part (300) of said receiver. The receiver comprising an element (240, 260) ... 09/21/06 - 20060209998 - Signal interference measurement Described herein is a method for determining the amount of interference in a received signal that comprises a wanted signal and a plurality of interfering signals. The method comprises selecting a plurality of first known structures in the wanted signal, processing the received signal in accordance with said plurality of ... 09/07/06 - 20060198475 - Apparatus and method for compensating iq imbalance in ofdm system with carrier frequency offset An apparatus and method of an OFDM system for compensating IQ imbalance. The apparatus includes a mixer module for mixing a wireless signal to generate a pair of in-phase and quadrature-phase analog signals; an in-phase and quadrature-phase imbalance parameter estimation unit coupled to the mixer module for estimating a gain ... 08/31/06 - 20060193409 - Method and apparatus for compensation of doppler induced carrier frequency offset in a digital receiver system Methods and apparatus are provided for compensating for Doppler induced carrier frequency offset in a digital receiver. According to one aspect of the invention, a received signal is digitized and a differential detection algorithm is applied to the digitized received signal to compensate for the Doppler induced carrier frequency offset. ... 08/24/06 - 20060188043 - High-speed signaling systems with adaptable pre-emphasis and equalization A signaling system includes a pre-emphasizing transmitter and an equalizing receiver coupled to one another via a high-speed signal path. The receiver measures the quality of data conveyed from the transmitter. A controller uses this information and other information to adaptively establish appropriate transmit pre-emphasis and receive equalization settings, e.g. ... 08/17/06 - 20060182206 - Communications system, method and device A method of estimating channel response in a communications system comprising a transmitting device having a plurality of transmit antennas and a receiving device having at least one receive antenna, the method comprising: (a) Superimposing training sequences onto transmit data to be transmitted by the transmit antennas in order to ... 08/17/06 - 20060182205 - Method for equalizing a digital signal through removal of data dependent jitter Equalized Acquisition Record are prepared from Original Acquisition Records reflecting Total Jitter and from an existing description of DDJ. Removal of timing DDJ alters the locations of edges associated with data events. Voltage DDJ adjusts the asserted voltage in the central portion of a Unit Interval. One technique for equalizing ... 08/10/06 - 20060176987 - Method and system for channel equalization One embodiment includes a method of receiving a transmitted signal. The method comprises receiving a signal transmitted over a channel. The signal comprises a known signal and an information signal. The method further includes determining at least one indicator of channel characteristics based at least in part on the portion ... 07/13/06 - 20060153318 - Memoryless spectrum correction algorithm for non-ideal i/q demodulators An algorithm for correcting the output of an analog I/Q demodulator without the need for calibration or storing state information. The output of the analog I/Q demodulator is digitized, and the discrete-time samples are divided into segments. A digital frequency transform (e.g., a Discrete Fourier Transform) is computed for each ... 06/29/06 - 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 ... 06/22/06 - 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 ... 06/22/06 - 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 ... 06/22/06 - 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 ... 06/08/06 - 20060120493 - Maintaining a selected slice level In one embodiment, the present invention includes a method for removing a DC offset from a loop having an amplifier coupled to receive an input signal, applying a selected slice level to the loop, and measuring an offset slice level at an output of the amplifier based on the applied ... 06/01/06 - 20060115028 - Method and device for reducing the crest factor of a signal A method and a device for reducing the crest factor of a signal is operable to generate a correction signal as a combination of a plurality of partial correction signals having respectively predetermined frequencies and a signal having a reduced crest factor being issued as a differential between the correction ... 05/11/06 - 20060098768 - Polymerization of macrocyclic polyester oligomers using n-heterocyclic carbene catalysts A method, system, and a computer usable program code for reducing the effects of intersymbol interference in a high speed data transmission using various steps. First, a training sequence is established between a transmitter operably connected by a conductor to a receiver. Data is analyzed at the receiver. Transition bits ... 05/11/06 - 20060098767 - Wireless receiver with anti-jamming An embodiment of the present invention provides a method for communicating data in the presence of jamming interference, comprising transmitting a first signal carrying the data from a transmitter to a receiver at a data transmission rate, determining at the receiver that the first signal has been corrupted by the ... 05/11/06 - 20060098766 - Method and apparatus for estimating the step-size of an adaptive equalizer A step-size estimator for controlling the step-size of an adaptive equalizer incorporated in a transceiver, (e.g., a wireless transmit/receive unit (WTRU)). The step-size estimator updates at least one adaptive equalizer tap used by the adaptive equalizer based on an apparent speed of a channel established between the transceiver and another ... 05/11/06 - 20060098765 - Interference cancellation in rfid systems An interference canceller for a RFID reader senses a signal related to the interference signal in the receive path of the reader. The canceller outputs an adjustment signal that depends on the sensed signal, which is coupled into the receive path before a downconverter in the receive path. The canceller ... 05/11/06 - 20060098764 - Method of protecting a frequency of a data stream from interference and circuit performing such a method A method for mixed analog digital designs protecting the frequencies that are important for the analog part. The generated digital data stream has relatively large signal levels compared to the sensitive analog parts. The data bit stream is monitored and their frequency spectrum is corrected. The monitoring is performed by ... 04/27/06 - 20060088135 - Arrangement and method for iterative channel impulse response estimation An arrangement (300) and method, for iterative channel impulse response estimation in a system such as a GSM/EDGE system employing a transmission channel, by: producing (310) from a received signal (y) a channel impulse response estimate signal (p); and producing (320) from the received signal (y) a noise estimate signal ... 04/13/06 - 20060078075 - Data detection and decoding with considerations for channel estimation errors due to guard subbands Techniques for performing data detection and decoding in a manner to account for guard subbands are described. A receiver obtains received pilot symbols for pilot subbands and received data symbols for data subbands. Channel estimates are derived based on the received pilot symbols with zeroed-out pilot subbands filled with zeros. ... 03/30/06 - 20060067441 - Apparatus and method for estimating delay spread of multi-path fading channel in wireless communication system Disclosed are an apparatus and method that can estimate the maximum delay spread by means of simple computation while being robust against SNR (Signal-to-Noise Ratio) variations. A standard deviation value of a noise component is produced from time-domain signal values obtained from a received signal. The time-domain signal values corresponding ... 03/23/06 - 20060062336 - Method of channel estimation A method for channel estimation is provided. Firstly is to estimate channel impulse response (CIR) of training sequence. Next is to generate a soft data by means of an equalizer according to the CIR of the training sequence. Subsequently is to estimate CIRs of data sequences according to the interposed ... 03/16/06 - 20060056549 - Methods and apparatus for canceling co-channel interference in a receiving system using spatio-temporal whitening Methods and apparatus for canceling co-channel interference in a receiving system using spatio-temporal whitening. In some embodiments, a spatio-temporal interference canceling method, and apparatus for carrying out the method are provided which effectively cancel co-channel interference despite frequency offset between the desired signal and the interferer in a TDMA type ... 03/09/06 - 20060050816 - Pipeline architecture for multi-slot wireless link processing A wireless communication device processes N Radio Frequency (RF) bursts contained within N slots of a digital communications time divided frame, wherein N is a positive integer greater than one. The wireless communication device includes an RF front end, a baseband processor, and an equalizer module. The RF from end ... 03/02/06 - 20060045219 - Backscatter interrogator reception method and interrogator for a modulated backscatter system In a backscatter interrogator reception method, a continuous carrier signal (P1) with a frequency fc is sent from an interrogator (100) to a tag device (110) over a wireless link, the tag device (110) transmits data to the interrogator (100) using a modulated backscatter (P2) signal, and the received modulated ... 03/02/06 - 20060045218 - Discrete denoising using blended counts Various embodiments of the present invention relate to a discrete denoiser that replaces all of one type of symbol in a received, noisy signal with a replacement symbol in order to produce a recovered signal less distorted with respect to an originally transmitted, clean signal than the received, noisy signal. ... 02/23/06 - 20060039511 - Digital signal processing remediation of cosite antenna interference Methods and apparatus for separating desired signals from a mixed signal. A preferred method includes identifying the frequencies associated with the independent signals within the mixed signal and sampling the mixed signal once for each of the identified frequencies. Using the identified frequencies, a set of constant coefficients is determined ... 01/12/06 - 20060008037 - Apparatus and method for estimating a carrier-to-interference-and-noise ratio in a communication system In an apparatus for estimating a Carrier-to-Interference-and-Noise Ratio (CINR) in a communication system, received signals are blocked based on sub-carriers with similar channel characteristics. Interference and noise levels and true received signal levels are computed on a block-by-block basis from the blocked received signals. CINRs are estimated on a block-by-block ... 12/29/05 - 20050286662 - Low noise circuit and applications thereof A low noise circuit includes a clocked circuit and an impedance trap circuit. The clocked circuit includes a clock input, an input, an output, a power supply connection, and a power return connection. The clock input is operably coupled to receive a clock signal. The clocked circuit provides an output ... 12/22/05 - 20050281360 - Reduction of average-to-minimum power ratio in communications signals This invention, generally speaking, modifies pulse amplitude modulated signals to reduce the ratio of average power to minimum power. The signal is modified in such a manner that the signal quality remains acceptable. The signal quality is described in terms of the Power Spectral Density (PSD) and the Error Vector ... 12/08/05 - 20050271171 - Method and device for motion-compensated noise evaluation in mobile wireless transmission systems Method for motion-compensated noise evaluation for mobile wireless transmission systems, in which reference symbols (14, 16) are sent out by a transmitter (1), with the features that from at least some of the reference symbols ({overscore (s)}−1, {overscore (s)}−2, {overscore (s)}−3) received in direct or indirect temporal succession in a ... 12/08/05 - 20050271170 - Method and apparatus for reduced interference signal demodulation A method and apparatus carry out received signal processing for received communication signals based on least squares processing to estimate the contribution of one or more interferer signals. The exemplary receiver uses interferer signal channel estimates to obtain least squares estimates for the interference contributions of one or more interferer ... 12/01/05 - 20050265495 - M-ary-modulation-capable equalizing processing apparatus, received signal processing system, receiver and m-ary-modulation-capable equalizing processing method An M-ary-modulation-capable equalizing processing apparatus, received signal processing system, receiver and M-ary-modulation-capable equalizing processing method enabling reduction in processing amount of the equalizing processing while improving bit error rate characteristics. M-ary-modulation-capable equalizing processing apparatus 6 has phase rotation sections 601 to 604, equalizing processing sections 611 to 614 and soft-decision ... 11/24/05 - 20050259770 - Adaptive channel estimation using decision feedback A method and system thereof for determining feedback for iterative channel estimation based on the summation of soft output decisions or Bit Error Rate (BER) derived from the output of an equalizer. The channel impulse response initially obtained according to a training sequence is used to estimate the received signal, ... 11/24/05 - 20050259769 - Quadrature phase shift interferometer (qpsi) decoder and method of decoding An arrangement and method for reliably finding the wave form extrema of interference signals produced by a quadrature phase shift interferometer (QPSI) takes advantage of the quadrature property of I and Q signals. The zero-crossing points in the I and Q signals are determined. Peak detection is performed for peaks ... 11/17/05 - 20050254607 - Cdma reception device A switching circuit (112) is controlled by an in-slot interface-noise-power-control output circuit (115) to output an in-slot interface noise power (107-n) to a past-slot interference-noise-power memory (110), if there is no estimated value for an interference noise power of finger n of one slot before. If the interference noise power ... 11/03/05 - 20050243953 - Dc offset cancellation for wlan communication devices A method of transmitting information in a WLAN (Wireless Local Area Network) network and corresponding WLAN communication devices and integrated circuit chips are provided. A correction signal is used for compensating for a dc offset in a data signal containing at least part of the information to be transmitted. The ... 10/13/05 - 20050226354 - Memory control method for time deinterleaving in dmb receiver Provided is a method for controlling a memory for time deinterleaving in a DMB receive by using byte addressing. The memory control method includes the steps of constructing the memory by the several segments so as to store only sample data used for actual time deinterleaving during a time period ... 10/13/05 - 20050226353 - Method and system for antenna interference cancellation A wireless communication system can comprise two or more antennas that interfere with one another via free space coupling, surface wave crosstalk, dielectric leakage, or other interference effect. The interference effect can produce an interference signal on one of the antennas. A cancellation device can suppress antenna interference by generating ... 10/13/05 - 20050226352 - Mirror suppression circuit and receiver using such circuit A mirror suppression circuit includes a first quadrature signal path coupled between quadrature signal input and output terminals and an error correction circuit for correction of amplitude and phase errors in a carrier modulated quadrature signal. To obtain a suppression of both amplitude and phase imbalance of the carrier modulated ... 09/29/05 - 20050213692 - Impulse noise reduction to an mcm signal A method reduces noise in a multiple carrier modulated (MCM) signal. Such a method may include: estimating impulse noise based in the equalized signal; and removing a portion of the noise in the equalized signal as a function of the estimated impulse noise. An apparatus reduces noise in the MCM. ... 09/15/05 - 20050201498 - Narrow band interference supressor A compact narrow band interference suppressor. The narrow band interference suppressor includes a plurality of interference signal elimination circuits, a frequency compensation circuit, an AGC amp, and an AD converter that are connected in series. Each interference signal elimination circuit includes a mixer for synthesizing a local oscillation signal of ... 09/08/05 - 20050195927 - Method and apparatus for conveying messages and simple patterns in communications network The invention relates to a method and apparatus for generating simple patterns on a terminal and conveying them in a communications network. In the method, an element of a pattern (201, 301) comprising elements is specified and it is assigned a code by which it is identified. The codes of ... 09/01/05 - 20050190870 - Relayed communication with versatile self-interference cancellation Methods, apparatuses, and systems are presented for providing self-interference cancellation in two-way relayed electromagnetic communication between a first and a second device through a relay station, involving retrofitting existing equipment comprising a transmitter system and a receiver system at the first device by adding a canceler module, providing a version ... 09/01/05 - 20050190869 - Device and method for supressing pulse interferences in a signal A device for suppressing pulse interferences contained in a signal, including a circuit for detecting pulse interferences contained in the signal, and a circuit for correcting the signal disturbed by the detected pulse interferences, in which the detection circuit comprises a circuit for determining a first coefficient representative of a ... 09/01/05 - 20050190868 - Iterative channel and interference estimation and decoding For an iterative channel and interference estimation and decoding scheme, prior information for channel gain and interference is initially obtained based on received pilot symbols. Forward information for code bits corresponding to received data symbols is derived based on the received data symbols and the prior information and then decoded ... 09/01/05 - 20050190867 - Low cost and high performance narrowband interference cancellation system A narrowband interference cancellation system, method and digital signal processor is disclosed that removes narrowband interference in wide band communication systems. The system includes a narrowband processing component, wideband processing component, soft metric generator and at least one filter. The system is configured to receive a signal, identify one or ... 08/18/05 - 20050180532 - Apparatus and method for calibrating in-phase and quadrature-phase mismatch A method and device for calibrating in-phase and quadrature-phase (IQ) mismatch. The device is used in a direct down-conversion circuit of a communication system. The device has a first mixer for mixing an RF signal with a first carrier signal, so as to generate an in-phase analog signal; a second ... 08/11/05 - 20050175127 - Method for determining the phase-and/or amplitude-noise spectrum of a digitally modulated signal A method for determining the phase and/or amplitude noise spectrum of a digitally modulated input signal. The method for determining a phase-noise spectrum comprises generating real complex samples, by digitally sampling a phase component and phase quadrature component of the input signal in baseband, determining ideal complex samples from generated ... 08/04/05 - 20050169410 - Digital radio receiver A receiving unit (2) receives a modulated signal resulting from modulating a carrier signal with a digital encoded train resulting from error-correction encoding a digital signal train. A demodulating unit (4) demodulates the digital encoded train from the received modulated signal. A decoding unit (8) decodes the digital signal train ... 08/04/05 - 20050169409 - Method for treating signal in the presence of interference The invention relates to methods of processing signals subjected to interference. It consists, when this signal is formed of a first wideband channel and of a second narrowband channel modulating one and the same carrier in which these signals are cut off for the duration of the interference, in using ... 07/28/05 - 20050163268 - Predistortion circuit and method for compensating nonlinear distortion in a digital rf communications transmitter A digital communications transmitter (100) includes a digital linear-and-nonlinear predistortion section (200) to compensate for linear and nonlinear distortion introduced by transmitter-analog components (120). A direct-digital-downconversion section (300) generates a complex digital return-data stream (254) from the analog components (120) without introducing quadrature imbalance. A relatively low resolution exhibited by ... 07/28/05 - 20050163267 - Enhanced denoising system A method and apparatus for processing a received digital signal that has been corrupted by a channel is disclosed. The method includes storing the received digital signal and receiving a partially corrected sequence of symbols that includes an output of a preliminary denoising system operating on the received digital signal. ... 07/14/05 - 20050152482 - Method and system for estimating and compensating iq imbalance A method of determining IQ imbalance introduced on an RF multicarrier signal received via a channel on a direct conversion analog receiver is disclosed. In one embodiment, the method comprises i) receiving a training signal on the receiver, ii) demodulating the training signal on the receiver, iii) estimating a first ... 07/14/05 - 20050152481 - Method and apparatus of iq mismatch calibration A method and an apparatus of IQ mismatch calibration in a radio communication system. The method includes receiving a radio frequency signal, mixing the radio frequency signal with a first carrier to generate an In-phase analog signal, mixing the radio frequency signal with a second carrier to generate a Quadrature-phase ... 06/30/05 - 20050141658 - Frequency offset estimating method and frequency offset correcting apparatus utilizing said method A frequency offset correcting unit estimates frequency offsets in a preamble period, corrects digital received signals by the estimated initial frequency and further corrects them by residual frequency signals. A receiving weight vector computing unit computes receiving weight vector signals by using LMS algorithm. Based on the error vectors or ... 06/30/05 - 20050141657 - Adaptive channel equalizer for wireless system Various embodiments are described for an adaptive channel equalizer. ... 06/16/05 - 20050129153 - Ultra wideband communication system, method and device with low noise reception An ultra-wide band (UWB) waveform receiver with noise cancellation for use in a UWB digital communication system. The UWB receiver uses a two-stage mixing approach to cancel noise and bias in the receiver. Self-jamming is prevented by inverting a portion of the received signal in the first mixer and then ... 06/16/05 - 20050129152 - Method and sytem for noise reduction in measurement receivers using automatic noise subtraction An N-element noise model of a receiver is created, with the number of noise elements (N) determined by the equation N=(number of variable gain components+1). The components in the model are grouped into domains with each noise element associated with a domain. The domains are defined so that the noise ... 06/09/05 - 20050123081 - Low-power mixed-mode echo/crosstalk cancellation in wireline communications A signal processing system is disclosed. The signal processing system comprises an AGC and pre-echo cancellation system for receiving an analog signal, boosting it up (over all frequencies) to a pre-determined range by AGC, and removing the immediate transmit pulse from this received signal by pre-echo canceller to provide a ... 06/09/05 - 20050123080 - Systems and methods for serial cancellation The systems and methods described and illustrated herein provide for serial interference suppression. In one embodiment, a Coded Signal Processing Engine (“CSPE”) serially cancels a plurality of channels corresponding to a plurality of signal paths interfering with a selected signal. For example, in a first interference cancellation, the CSPE may ... 06/02/05 - 20050117676 - Device and method for identifying interference source in wireless communications A device for identifying interference source in wireless communications is provided, including a correlation compound module, a matching and screening module, a statistical analysis module, and a match identification module. The correlation compound module uses the time of arrival (TOA) of the burst as the synchronization basis to compound the ... ### FreshPatents.com Support |