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Pulse Or Digital Communications > Spread Spectrum > Direct Sequence > End-to-end Transmission System End-to-end Transmission SystemEnd-to-end Transmission System 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 - 20070258509 - Transmission method and transmission apparatus in an ofdm-cdma communication system A OFDM-CDMA communication system that generates a plurality of subcarrier components by multiplying each of a plurality of transmission symbols by a channelization code whose length is N according to a spreading factor, and transmits those subcarrier components by a plurality of different subcarriers, measures the propagation environment of each ... 09/27/07 - 20070223565 - Decision feedback equalizer for code division multiplexed signals A decision feedback equalizer (DFE) processes a signal having multiple code channels by filtering an error signal based on a difference between a received signal and an estimated received signal. The received signal is processed to recover data on each of the code channels and to generate an estimate of ... 09/13/07 - 20070211786 - Multicarrier sub-layer for direct sequence channel and multiple-access coding Carrier Interferometry (CI) provides wideband transmission protocols with frequency-band selectivity to improve interference rejection, reduce multipath fading, and enable operation across non-continuous frequency bands. Direct-sequence protocols, such as DS-CDMA, are provided with CI to greatly improve performance and reduce transceiver complexity. CI introduces families of orthogonal polyphase codes that can ... 09/06/07 - 20070206661 - Transmitter, receiver, and transmission/reception system A transmission/reception system includes a transmitter and a receiver. The transmitter includes a voltage converter for generating a voltage according to transmission data, a voltage-controlled oscillator for generating a signal of a frequency corresponding to the voltage generated by the voltage converter under non-feedback control, and a first antenna for ... 08/30/07 - 20070201536 - Apparatus, system and method for providing a multiple input/multiple output (mimo) channel interface A system, method and apparatus, provide for the utilization of the MIMO technique with single-antenna communication devices that maximize high-speed broadband communication. The apparatus includes a wireless communication interface (WCI) device configured to exchange wireless signals with a base station through a multiple input multiple output (MIMO) air interface and ... 08/09/07 - 20070183482 - Cdma communication apparatus and cdma communication method A CDMA communication apparatus wherein resistance against phase noise can be improved without degradation of transmission efficiency. In this apparatus, spread parts (110-1 to 110-n) spread the respective ones of transmission signals (1 to n). Coordinate transformation parts (120-1 to 120-n) interchange the in-phase and quadrature components of the signals ... 08/09/07 - 20070183481 - Terrestrial repeater with redistribution of pseudo-random codes on different carrier frequencies This invention concerns a terrestrial repeater (RF) dedicated to a hybrid communication network comprising a satellite for transmitting to terminals (and at least to the repeater) signals (SPI) in the form of a first modulated carrier with data to be transmitted, encoded by suing initial sequences of at least two ... 08/09/07 - 20070183480 - Channel-adaptive waveform modulation A method for transmitting a sequence of data blocks of equal length includes obtaining part of a matrix for the impulse response function of a communication channel between a transmitter and a receiver. The part relating to channel-induced interference between sampling intervals of adjacent ones of the data blocks. The ... 07/19/07 - 20070165698 - Pre-whitened dc free line coding A pre-whitened DC free line coding system is provided. The pre-whitened DC free line coding system comprises a scrambler adapted to whiten an input signal and an encoder adapted to convert the whitened input signal to a DC balanced signal. ... 07/12/07 - 20070160116 - Communication device with smart antenna using a quality-indication signal Communication is performed for a first communication device having a set of antenna elements. A quality-indication signal is received from a second communication device (e.g., a basestation). A complex weighting is calculated based on the quality-indication signal. A pre-transmission signal is modified based on the complex weighting to produce a ... 06/07/07 - 20070127554 - Communication network using synchronous code division multiplexing method In a communication network which performs transmission from a plurality of first communication devices to a single second communication device using a synchronous code division multiplexing technique, the phases of signals transmitted from the first communication devices are synchronized easily. The first communication devices control the transmission phase of spread ... 05/31/07 - 20070121706 - Base station apparatus of mobile communication system A spreading and/or despreading mechanism in which the inphase component and a quadrature component of a signal are to be transmitted by using a short code and a long code. The long code has an inphase component and a quadrature component that are different from each other. The spreading and ... 05/17/07 - 20070110128 - Multi-mok modulation/demodulation transmission process, corresponding transmitter and receiver At transmission, the data to be transmitted is divided into N data blocks, these N blocks are processed in parallel in N M-ary orthogonal keying (MOK) modulation channels, each modulation using a group of spread codes, each channel emitting a signal, all these signals (S) are transmitted in series. At ... 05/17/07 - 20070110127 - Method and apparatus for deriving a channel impulse response estimate for a wireless channel Techniques for deriving a channel impulse response estimate (CIRE) having improved quality are described. A first CIRE with multiple channel taps is obtained based on (1) an initial CIRE derived from a received pilot or (2) a filtered CIRE derived from the initial CIRE. In one aspect, the channel taps ... 05/03/07 - 20070098047 - Wireless communication apparatus A wireless communication apparatus includes: a transmitter which sends transmitted data while mixing it with a carrier; a receiver which receives the transmitted data sent from the transmitter while mixing it with the carrier; a spreading waveform generator which generates a spread clock resulting from a reference clock for generating ... 04/26/07 - 20070091985 - Code division multiple access transmission antenna weighting A code division multiple access communication system has a base station with a plurality of transmitting antennas. From each transmitting antenna of the base station, a pilot signal is transmitted having a different chip sequence than the other transmitting antenna. At a user equipment, the transmitted pilot signals are received ... 04/05/07 - 20070076784 - Techniques to improve redundancy for multi-carrier wireless systems Various techniques are disclosed to improve redundancy in multi-carrier wireless systems. An example technique is provided that may include commonly encoding a block of data, modulating the encoded block of data across a plurality of carriers, and transmitting via a wireless link the encoded block of data including the plurality ... 03/08/07 - 20070053414 - Full duplex multimode transceiver A method of operating a multimode transceiver comprises simultaneously transmitting (Tx) a signal having a relatively wide output frequency spectrum and receiving (Rx) a signal having a frequency spectrum narrower than that of the output frequency spectrum, but lying in the same band. A notch is introduced by a filter ... 03/01/07 - 20070047626 - Mixed voice and spread spectrum data signaling with multiplexing multiple users with cdma Systems, methods, and devices for mixed voice and spread spectrum data signaling with spread spectrum data hiding with CDMA (Code Division Multiple Access) for three or more users. The disclosed systems, methods, and devices may be implemented in audio conferencing or video conferencing. Various embodiments of the present disclosure provide ... 03/01/07 - 20070047625 - Multi-mode wireless communication device and method A multimode wireless communication device capable of communicating pursuant to first and second communication protocols, including a method wherein a determination is made (530) as to whether a harmonic generated during transmission in one protocol interferes with reception in another protocol, and wherein transmission is suspended while receiving only if ... 02/15/07 - 20070036202 - Code, signal and conjugate direction design for rapidly-adaptive communication receivers and electromagnetic, acoustic and nuclear array processors A system and method are disclosed that substantially reduce the complexity of receivers in digitally modulated wireless communication systems such as systems that use CDMA and similar multi-access coding. Transmitted signals are designed to use orthogonal or non-orthogonal codes with specific amplitudes that reduce the number of distinct eigenvalues in ... 02/08/07 - 20070030885 - Method and system of transmitting word representing transmission parameters respectively allocated to mobile stations communicating with a base station in a mobile communication system Method for transmitting a word representative of transmission parameters respectively allocated to the mobile stations in communication with a base station of a mobile telecommunication system, wherein it includes the step of: including, in each transmission burst a midamble resulting from the sum of selected midambles among all the available ... 02/01/07 - 20070025423 - Weighted open loop power control system A weighted open loop power control system for controlling transmission power levels using a spread spectrum time division duplex (TDD) technique having frames with timeslots for communication comprises a receiver and a transmitter. The receiver includes a reference channel data generator, a spreading and training sequence insertion device, an amplifier, ... 02/01/07 - 20070025422 - Communication apparatus It is an object to propose a way to assign channelization that is applicable to a case in which the number of multiplexing of DPDCHs (Dedicated Physical Data Channels) is at least five for overshoot of HPSK (Hybrid Phase Shift Keying) modulation. Assignment of channelization codes is set as follows. ... 01/04/07 - 20070002932 - Reception time determining apparatus and distance measuring apparatus using the same There is provided a reception time determining apparatus (11, 111) where a transmitter (1, 100) sends a transmission signal which produces a demodulation signal in which a signal change portion is unevenly distributed on a time axis, and there is provided: a demodulation section (12, 112) which receives and demodulates ... 12/07/06 - 20060274817 - Method and apparatus for wireless communications A communication system 20 uses TDMA techniques to distinguish intended recipients of a communication signal 26 from one another, and direct sequence spread spectrum (DSSS) techniques to encode and distinguish diverse parallel substreams 70 and 74 of each user's data stream. Parallel unspread substreams 70 are spread using cyclic variations ... 11/23/06 - 20060262832 - Convolutionally encoding and decoding multiple data streams A plurality of data streams are convolutionally encoded. Each convolutionally encoded data stream has a particular data rate. The particular data rate of each data stream is adjusted so that an adjusted data rate of that data stream matches a data rate of a CDMA transmission. When the particular data ... 11/16/06 - 20060256841 - Channel estimation for time division duplex communication systems A single transmitter transmits K communication bursts in a shared spectrum in a time slot of a time division duplex communication system. Each burst has an associated midamble sequence, a receiver knowing the midamble sequences of the K bursts. The receiver receives a vector corresponding to the transmitted midamble sequences ... 11/16/06 - 20060256840 - Application of spreading codes to signals A method for applying one or more code values to an input signal value to produce an output signal value in a CDMA communications scheme, wherein the code value or values may lie only either on or equally distant from an orthogonal pair of axes defining a two dimensional signal ... 09/28/06 - 20060215732 - Blind selected mapping techniques for crest factor reduction of forward link cdma signals Disclosed are apparatus that implement blind selected mapping techniques that provide for crest factor reduction of forward link CDMA signals. Communication signals are processed using a mathematical algorithm that selectively maps a summed communication signal in a frame to another summed communication signal which has a smaller peak-to-average power ratio. ... 09/14/06 - 20060203892 - Spread spectrum communication unit A communication unit comprises a command signal generator for generating a command signal. A transmitter transmits communication signals at one of two frequencies and for transmitting the command signal. A receiver receives communication signals at one of the two frequencies and for receiving the command signal. Upon initiation of the ... 08/31/06 - 20060193373 - Highly bandwidth-efficient communications A discrete multitone stacked-carrier spread spectrum communication method is based on frequency domain spreading including multiplication of a baseband signal by a set of superimposed, or stacked, complex sinusoid carrier waves. In a preferred embodiment, the spreading involves energizing the bins of a large Fast Fourier transform (FFT). This provides ... 08/17/06 - 20060182167 - Radio transmitter-receiving apparatus and radio transmitting-receiving method for estimating noise and interference power in radio tramission using code spread A radio transmitter-receiver wherein a pilot symbol is used in the transmitter that has undergone M-chip spreading on the frequency axis and N-chip spreading on the time axis by a spreading code of M×N chip length (where M and N are any integers equal to or greater than 2), and ... 07/06/06 - 20060146917 - Multi-mode transmitter circuit for switching over between tdma mode and cdma mode A multi-mode transmitter circuit is provided for selectively switching over between a TDMA mode and a CDMA mode, where a transmission frequency of the CDMA mode is substantially identical to a transmission frequency of the TDMA mode. In the TDMA and CDMA modes, a filter device attenuates frequency band components ... 05/18/06 - 20060104335 - Low-rate long-range mode for ofdm wireless lan A system for implementing an orthogonal frequency division multiplexing scheme and providing an improved range extension. The system includes a transmitter for transmitting data to a receiver. The transmitter includes a symbol mapper for generating a symbol for each of a plurality of subcarriers and a spreading module for spreading ... 03/30/06 - 20060067382 - Unambiguously encoding and decoding signals for wireless channels A method encodes a sequence of blocks of input bits to be transmitted over a wireless channel. Each block of input bits is converted to a codeword, and each codeword is mapped to multiple sub-blocks of complex numbers. Each sub-block is multiplied by a disambiguating spreading transform to obtain a ... 03/23/06 - 20060062282 - Method for providing packet framing in a dsss radio system An improved method of framing data packets in a direct sequence spread spectrum (DSSS) system that uses one pseudo-noise code (PN-Code) to frame the packet with a start-of-packet (SOP) and end-of-packet (EOP) indicator, and a different PN-Code to encode the data payload. Furthermore, the SOP is represented by the framing ... 01/19/06 - 20060013286 - Configurable multimode despreader for spread spectrum applications A configurable multimode despreader for spread spectrum applications is disclosed herein. The despreader includes a plurality of data lines, at least one selective coupler coupled to the plurality of data lines, at least one multiplier coupled to the selective coupler, and a code input line coupled to the multiplier. The ... 12/22/05 - 20050281320 - Low power wireless communication system and protocol A wireless communication system and protocol are disclosed. The system includes at least one tag and at least one access point. The access point transmits a beacon signal that includes a predetermined binary sequence such as a pseudonoise (PN) sequence. The tag typically does not include an expensive accurate frequency ... 10/13/05 - 20050226311 - Radio base station apparatus At the time of modulating transmission data, TRX 35 error-checks the transmission data and outputs the result of the error check, whereas BB 36 error-checks received data output from TRX 35 and makes a health check based on the result of the error check of the received data and the ... 10/06/05 - 20050220175 - Circuit for synchronizing symbols of ofdm signal A circuit for synchronizing symbols of a received OFDM signal includes a cross-correlation detecting unit configured to detect cross-correlation of a received signal to generate a value of the cross-correlation, a synchronous summation unit configured to obtain synchronous summation of the value of the cross-correlation performed at predetermined intervals, a ... 09/29/05 - 20050213638 - Data transmission method, data reception method, data transport method, data transmission device, data reception device, data transfer system, and communication terminal On a transmitting side, input data is separated into a first data row and a second data row by the unit of predetermined symbol; one code is selected among a plurality of orthogonal codes in accordance with the separated second data row; the first data row is diffused using the ... 09/22/05 - 20050207475 - Transmit power adaptation for cdma communication systes using successive interference cancellation where K is the number of users and SR(i) is the received signal power of the user having the ith strength, and wherein user strengths are ranked in the order of estimated channel gains. The factor xi gives a measure of the disparity between the received power levels. The channel ... 08/11/05 - 20050175070 - Synchronized broadcast/multicast communication Synchronized broadcast transmits a same broadcast content using a same waveform from multiple transmitters. Transmitters each apply a same spreading code for broadcast transmissions. In a spread-spectrum communication system having a time division multiplexed forward link, a synchronized broadcast transmission is inserted into a broadcast slot. One embodiment employs an ... 06/16/05 - 20050129093 - Digital communication system and method A digital communication system for communication between a first terminal and a second terminal, the first terminal including a spread spectrum modulator for spreading a transmitted signal, the transmitted signal being spread by a spread factor. The spread system spectrum modulator forms part of a first terminal modem. The second ... ### FreshPatents.com Support |