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7415065 Adaptive filtering in the presence of multipath  
Adaptively analyzing an observed signal to estimate that part of the signal that best corresponds to a steering vector. Modifying the steering vector by convolution of the steering vector with a...
7394849 Decision feedback equalizer with dynamic feedback control  
A decision feedback equalizer with dynamic feedback control for use in an adaptive signal equalizer. Timing within the decision feedback loop is dynamically controlled to optimize recovery of the...
7386053 System and method of equalization of high speed signals  
In one aspect, the present invention is directed to a technique of, and system for enhancing the performance of high-speed digital communications through a communications channel, for example a...
7366232 Method and device for the automatic selection of the bit rate in high frequency transmissions  
A method and device for determining at least one traffic parameter in a data transmission system including at least one transmitter and one receiver, wherein the receiver includes a modem with...
7356108 OFDM receiver having adaptive channel estimator for correcting channel fading based on accumulated pseudo power values  
A channel estimator is configured for determining a gain adjustment for a received wireless signal having a prescribed plurality of tones. The channel estimator is configured for generating, for...
7346105 Decision feedback equalization with fractionally-spaced feedback data  
A decision feedback equalizer (DFE) architecture uses feedback samples that are over-sampled with respect to the symbol rate. On-baud feedback samples are quantized with a slicer, while off-baud...
7336220 Method and apparatus for equalizing broadband chirped signal  
In order to generate a signal for canceling a chirped signal, a transmitter generates a cancellation signal along with the transmitted signal, using a single term variable complex gain multiplier...
7330068 Adjusting coefficients of a filter  
Demodulation apparatus includes a transversal filter characterized by coefficients adjusted by a coefficient determiner responsive to a constant modulus error signal and variable mode error signal...
7327815 Method for synchronizing several digital input signals  
The invention relates to a method for synchronizing a plurality of digital input signals which are formed by sampling with the aid of a dedicated operating clock in each case. In order to be able...
7319719 Parallel equalization for systems using time division multiple access  
An equalization circuit is provided. The equalization circuit includes an input adapted to receive signals from a communications channel. The equalization circuit further includes a plurality of...
7301998 Filter with signal taps temporally spaced at fractional symbol intervals  
Described are methods and devices for processing a signal transmitting symbols which are temporally spaced on symbol intervals. The signal may be tapped at fractional symbol intervals to provide a...
7292661 Block-iterative equalizers for digital communication system  
A block-iterative equalizer is adapted for use in contemporary digital communication system receivers. In a preferred embodiment, data received over a communication channel is processed by a linear...
7289557 Adaptive equalization using a conditional update sign-sign least mean square algorithm  
An adaptive equalizer finite impulse response (FIR) filter for high-speed communication channels with modest complexity, where the filter is iteratively updated during a training sequence by a...
7283586 Adaptive equalizer matched filter error metric concept and apparatus  
A correlative error detection system ( 60 ) for a signal equalizer ( 10 ) that corrects a distorted communications signal. The detection system ( 60 ) correlates a sequence of bits in a signal from...
7274745 Single-carrier receiver having a channel equalizer interacting with a Trellis decoder and a channel equalization method therefor  
A channel equalizer for a single-carrier receiver interacting with a Trellis decoder and a channel equalization method therefor. The channel equalizer includes a first equalizer having a first feed...
7266355 Low complexity equalizer for radio receiver  
A diversity receiver ( 60 ) has two diverse channels fed by the antennas, an adaptive equalizer ( 20,30 ) for each channel and a coefficient adapter ( 40 ) for adapting two sets of coefficients in...
7266145 Adaptive signal equalizer with adaptive error timing and precursor/postcursor configuration control  
An adaptive signal equalizer with a feedforward filter in which the feedback error signal and corresponding incoming data signal are dynamically aligned in time using signal interpolation, and...
7254171 Equaliser for digital communications systems and method of equalisation  
Equalisation of a communication channel is achieved through use of a Wiener filter frequency response mechanism that operates to transform at least a portion of a data stream generated from a...
7251297 Method and system to identify and characterize nonlinearities in optical communications channels  
A method for identifying and modeling nonlinearities in communications channels, particularly optical communication channels. A channel in general is modeled as a summation of linear and non linear...
7242732 Carrier based backwards compatible data networking transmitter, receiver, and signal format  
New version packet data devices support a backwards-compatible signal format. New version devices operate within a first frequency band while old version devices operate within a second frequency...
7218671 Equalizer for a VSB receiver enabling equalizations using segment synchronization information  
An equalizer for a VSB receiver, which enables equalizations using segment synchronization information, has an extraction unit extracting the segment synchronization information included in the VSB...
7174087 Playback apparatus and adaptive equalizing circuit with a phase-locked loop coupled thereto  
An equalizing circuit is provided for a playback apparatus not requiring tracking control. A playback signal is supplied to a plurality of unit delay devices which are connected in series, and the...
7161996 Multi-antenna wireless receiver chains with vector decoding  
A receiver chain is provided for use in wireless data communication including a plurality of receive antennas and a vector Barker decoder or a CCK decoder. The vector Barker decoder operates on the...
7158565 Waveform equalizer and shift register  
In a tap 1 in a shift register of a waveform equalizer, data of an input signal is stored in a data storing FF 111 . A tap coefficient computing unit 114 calculates a tap coefficient, which is...
7154969 Method for shared estimation of parameters  
A method for shared estimation of parameters (ε, φ, |C 1 |, C 0 , α, Δω) is described, which together with an error vector e(k), describe the connection between a digitally modulated reference...
7139343 Digital radio receiver  
The present invention is to provide a digital radio receiver using a carrier offset compensating circuit capable of compensating for carrier offsets even in a TDD communication system, and...
7130366 Compensation circuit and method for reducing intersymbol interference products caused by signal transmission via dispersive media  
A compensation circuit and method for reducing ISI products within an electrical data signal corresponding to a detected data signal received via a signal transmission medium introduces distinct...
7130341 Feed forward equalizer controlled by FEC correction rates  
A method of signal equalization of a transmitted bit stream by means of a feed forward equalizer is provided, whereby the signal is decomposed into at least two components and the components are...
7120193 Decision feedback equalizer with dynamic feedback control  
A decision feedback equalizer with dynamic feedback control for use in an adaptive signal equalizer. Timing within the decision feedback loop is dynamically controlled to optimize recovery of the...
7103098 Adaptive receiver for multiplex/multi-access communications  
A received communication signal in which input data has been differentially encoded using a number of nominal symbols is filtered according to variable filter coefficients. A symbol is predicted...
7092436 Expectation-maximization-based channel estimation and signal detection for wireless communications systems  
A system and method detect symbols of a modulated signal received via a plurality of channels of a wireless communications system. A symbol transmitted via the channels is initially estimated based...
7079608 Method and device for channel estimation, in particular for a cellular mobile telephone  
A method for estimating the impulse response of an information transmission channel includes evaluating a useful number of coefficients of an impulse response of the information transmission...
7079575 Equalization for crosspoint switches  
Equalization for ports of a crosspoint switch at least partially offsets transmission losses such as skin loss. The equalization may be tailored on a port-by-port basis using adaptive equalization...
7079574 Carrier phase recovery system for adaptive burst modems and link hopping radio networks  
A method for a carrier phase recovery apparatus in a multiple-link hopping radio system includes hopping among a plurality of radio links to receive bursts of radio signals on the plurality of...
7042937 Hybrid frequency-time domain equalizer  
A channel decoder employs a hybrid frequency-time domain equalizer for effectively combining a frequency domain equalizer with a time domain equalizer to achieve superior static and dynamic...
7035330 Decision feedback equalizer with dynamic feedback control  
A decision feedback equalizer with dynamic feedback control for use in an adaptive signal equalizer. Timing within the decision feedback loop is dynamically controlled to optimize recovery of the...
7016405 Signal circulation for adaptive signal equalization in digital communication systems  
A method and system for equalizing a signal transmitted via a channel of a communications system stores an input signal received via the channel in a main buffer. A training signal portion of the...
6999509 Method and apparatus for generating a set of filter coefficients for a time updated adaptive filter  
An apparatus and method suitable for producing a set of filter coefficients are provided. Sequences of samples of first and second signals are received by the apparatus. Each received sample is...
6993093 OFDM receiving apparatus with reduced bit error rate after demodulation  
A delay equalizing unit includes a delay time calculating unit for calculating a plurality of delay times which differ from each other by short time periods and which include the delay time of the...
6968170 Adaptive correction of a received signal frequency response tilt  
Distortion due to transmission characteristics of a transmission medium is corrected by measuring leakage in a signal orthogonal to a received signal. The frequency response of an equalizer is...
6963604 Blind equalizers using probability density matching and parzen windowing  
An iterative method of equalizing an input signal received over a digital communication channel can include (a) using a kernel density estimate where different values of a kernel size are...
6947482 System and method for high-speed decoding and ISI compensation in a multi-pair transceiver system  
A method and a system for providing ISI compensation to an input signal in a bifurcated manner. ISI compensation is provided in two stages, a first stage compensates ISI components induced by...
6947481 Code enhanced equalization based upon a reliability factor  
A receiver includes an equalizer and a decoder which decodes data from a signal. The signal is based upon an output of the equalizer. The receiver also includes an encoder, which re-encodes the...
6940898 Adaptive coefficient signal generator for adaptive signal equalizers with fractionally-spaced feedback  
An adaptive coefficient signal generator for use in an adaptive signal equalizer with fractionally-spaced feedback. The signals representing the feedback tap coefficients are generated in...
6907064 Waveform equalization controller and waveform equalization control method  
A waveform equalization controller which combines a follow-up property when the distortion is varied and there is a higher convergence speed at the initial operation, and a higher stability at a...
6904086 Adaptive equalizer circuit  
An adaptive equalizer processing an input having a fluctuating amplitude realizes a stable adaptive equalization operation without changing over a reference value for computing an equalization...
6876699 Filter circuit for a bit pump and method of configuring the same  
A filter circuit, method of configuring the filter circuit, and a bit pump and transceiver employing the circuit and method. In one embodiment, the filter circuit includes a noise prediction...
6870880 Waveform equalization apparatus  
A waveform equalization apparatus is provided with plural TF (transversal filter) units and plural selectors, and the TF units are connected such that the construction of the whole filter becomes a...
6853695 System and method for deriving symbol timing  
A symbol timing derivation system derives receiver timing from received symbols which avoids the need for a pilot tone, thereby reducing power consumption and expanding usable bandwidth. The system...
6829314 Adapter for near end crosstalk and echo canceller for bi-directional digital communications  
The invention is embodied in an adapter for use with a near end crosstalk (NEXT) canceller which reduces crosstalk, from a locally transmitted signal, in a locally received digital signal by...
Matches 1 - 50 out of 280 1 2 3 4 5 6 >