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8326905 Transversal filter circuit with a plurality of delay units, multiplexers, and full adders suited for a smaller decision feedback equalizer  
A transversal filter circuit comprises a plurality of delay units, a plurality of multiplexers and a plurality of full adders. The plurality of delay units is coupled in series to delay a two-bit...
8285772 Order adaptive finite impulse response filter and operating method thereof  
A device for allocating a number of taps of a designated finite impulse response filter is disclosed. The device comprises a plurality of designated finite impulse response filters having fixed...
8284828 Monitoring instability and resetting an equalizer  
Instability resulting from non-linear impairments is detected and an equalizer of an end device is reset. An equalization instability threshold is retrieved from a data storage device. An...
8270625 Secondary path modeling for active noise control  
Methods for modeling the secondary path of an ANC system to improve convergence and tracking during noise control operation, and their associated uses are provided. In one aspect, for example, a...
8249270 Sound signal correcting method, sound signal correcting apparatus and computer program  
A sound signal correcting apparatus converts an acquired sound signal into a phase spectrum and an amplitude spectrum by an FFT process, compares the amplitude spectrum of the obtained sound...
8244787 Optimum nonlinear correntropy filter  
A signal processing method is provided. The method includes receiving a signal input, and filtering the signal input using a nonlinear correntropy filter. The method additionally includes...
8208462 Line driver for an adaptive hybrid circuit  
A second output transmission signal (“TX2”) added to a line driver is a scaled version of the main output transmission signal (“TX1”). TX2 is scaled from TX1 by a variable scale factor K. An...
8208529 Equalization apparatus and method of compensating distorted signal and data receiving apparatus  
Provided are an equalization apparatus and method of compensating a distorted received signal. The equalization apparatus includes: a filter unit removing inter-symbol interference (ISI) from a...
8200731 Device for determining a coherence measurement for a digital signal that does not require spectral estimation  
A device for and method of determining a coherence measurement for a signal that includes a digitizer for digitizing the signal, a transformer connected to the digitizer, a first squarer connected...
8179956 Adaptive equalizer and adaptive equalization method  
An adaptive equalizer includes an adaptive filter and a control unit. The adaptive filter performs an adaptive equalization processing for an input signal so as to make an amplitude of an...
8179997 Real-time digital quadrature demodulation method and device for ultrasonic imaging system  
A real-time digital quadrature demodulation method and device for the ultrasonic imaging system are disclosed in this invention. In addition to a multiplying step and a filtering step, the method...
8175201 Systems and methods for adaptive equalization in recording channels  
Various embodiments of the present invention provide systems and methods for performing adaptive equalization. For example, various embodiments of the present invention provide methods for...
8170879 Periodic signal enhancement system  
A signal enhancement system improves the understandability of speech or other audio signals. The system reinforces selected parts of the signal, may attenuate selected parts of the signal, and may...
8166084 Calibration of adjustable filters  
A filter controller. In one embodiment, the filter controller includes a first mechanism for providing an input signal to an adjustable filter. A second mechanism measures a response of the...
8155468 Image processing method and apparatus  
A method of processing an image includes traversing pixels of an image in a single pass over the image. An inverting function is applied to the pixels. A recursive filter is applied to the...
8150682 Adaptive filter pitch extraction  
An enhancement system extracts pitch from a processed speech signal. The system estimates the pitch of voiced speech by deriving filter coefficients of an adaptive filter and using the obtained...
8145693 Fir filter apparatus, audio apparatus and fir filter program  
A coefficient compensating unit 33 calculates based on a loop point and a cross-fade point of impulse response coefficient data renewed compensation impulse response coefficients specified for a...
8144759 Adaptive methods employing optimal convergence factors for processing complex signals and systems  
Complex adaptive methods for complex information processing employ optimal individual convergence factors for real and imaginary components of the weight vector. For wireless receivers operating...
8121232 Transmitting/receiving system and method of processing broadcast signal in transmitting/receiving system  
A receiving system and a method of processing broadcast signal are disclosed herein. The receiving system includes a signal receiving unit, a detector, and a channel equalizer. The signal...
8108453 System and method for filter response switching  
A system and method are provided for efficiently switching a loop bandwidth using stored values in a digital filter of a phase-locked loop system. In a first timeslice, an input signal is...
8103011 Signal detection using multiple detectors  
Signal detectors are described herein. By way of example, a system for detecting signals can include a microphone signal detector, a loudspeaker signal detector, a signal discriminator and a...
8098724 Automatic calibration in high-speed serial interface receiver circuitry  
Circuitry for receiving a serial data signal (e.g., a high-speed serial data signal) includes adjustable equalizer circuitry for producing an equalized version of the serial data signal. The...
8090047 System and method for programmably adjusting gain and frequency response in a 10-gigabit ethernet/fibre channel system  
Systems and methods for optimizing operation of a transceiver device are disclosed. The method may include parallel processing an input signal through a first path having a first frequency...
8082286 Method and system for soft-weighting a reiterative adaptive signal processor  
This invention is an improvement upon the basic adaptive signal processors, the Multi-Stage Wiener Filter and the cascaded canceller. The invention combines the concepts of soft weighting the...
8077796 Methods and arrangements for communicating in a multiple input multiple output system  
Systems and methods for utilizing new communication standards in wireless local area networks are provided that also support legacy wireless stations. The method can include user equipment...
8077642 Methods and apparatus for signal echo cancellation and transmitter calibration in full duplex systems  
A method includes transmitting a first signal over a network from a first communication link to a second communication link. The method further includes receiving a second signal with the first...
8069198 Integrated circuit having a filter circuit  
A filter circuit arrangement comprising a circuit configuration having non-linear transmission characteristics for equalizing an input signal is disclosed. In one embodiment, the circuit...
8041757 Low power and low complexity adaptive self-linearization  
A method of signal processing comprises receiving an unknown input signal that includes a distorted component and an undistorted component, the unknown input signal having a sampling rate of R;...
8027279 Echo cancellation  
Embodiments related to echo compensation have been described and depicted.
8014541 Method and system for audio filtering  
A system and method for graphic equalization of audio signals is disclosed. Traditional graphic equalizers provide control over the gains in each of a set of frequency bands. However, the actual...
8005882 System and method for determining application of adaptive filter  
A system for determining application of an adaptive filter includes a signal sensor to sense a detection signal; an adaptive filter to filter the sensed signal adaptively; and a module for...
7979484 Method and system for accelerating the computation of adaptive weights using matrix inverse calculations  
A system and method is provided for performing matrix inverse functions, for example, for use within Space-Time Adaptive Processing (STAP). The methods use parallelism of a Forward/Backward...
7917562 Method and system for estimating and applying a step size value for LMS echo cancellers  
Disclosed is an improved method and apparatus for estimating and applying a step size value for a least mean squares echo canceller. A power estimate of an excitation signal is compared to a...
7917563 Read channel processor  
Adapting a read channel processor is disclosed. Adapting includes determining a target output for input data from a variable target function, determining a filter output corresponding to the input...
7894517 Self-calibrated adaptive equalization system and methods of performing the same  
A self-calibrating, adaptive equalization system for generating an ideal digital signal is disclosed. The adaptive equalization system includes an equalizer and a high-gain buffer. The equalizer...
7885360 Wireless communication apparatus and receiving method  
A wireless communication apparatus receives an quadrature modulated signal, generate a local signal having a frequency different from a center frequency of the quadrature modulated signal,...
7848405 Communication system  
Forward and backward equalization processes are effectively used in a communication system for equalizing a received signal of a frame including a known symbol part. The known symbol part is...
7844651 Equalizer, group delay compensation circuit for the equalizer and method of compensating for group delay in the equalizer  
An equalizer, group delay compensation circuit for the equalizer and method of compensating for group delay may improve group delay characteristics in the equalizer. The equalizer circuit may...
7831647 Movable tap finite impulse response filter  
A finite impulse response (FIR) filter comprises a first multiplier that receives an input signal and a first tap coefficient. A first delay element receives the input signal and provides a fixed...
7813422 Adaptive equalizer with tap coefficient averaging  
In one embodiment, a receiver has an equalizer, a tap-averaging block, a delay buffer, and a filter. The equalizer receives an input signal from upstream processing and generates sets of filter...
7801209 Variable tap length equalizers and related digital receivers, methods and computer program products  
Equalizers are provided including an N-tap feed forward filter, an M-tap feed backward filter, an L-tap filter, a control unit and an accumulator. The control unit is configured to connect the...
7774396 Method and device for low delay processing  
Adaptive processing of an input signal is achieved by offline analysis, with inline processing comprising an adaptive filter. The method comprises passing the input signal through an adaptive time...
7742520 Equalization circuit  
An equalization circuit that allows particularly for lowpass filtering by transmission lines comprises a compensating equalizer controlled according to whether the edges between bits in the data...
7739320 Waveform equalizer, waveform equalization method, and integrated circuit  
A waveform equalizer includes a filter unit, an error estimation unit, a tap coefficient storage unit, and an update amount calculation unit which includes an intermediate calculation unit and an...
7739321 Method and adaptive filter for processing a sequence of input data  
An adaptive filter that processes a sequence of input data includes a backward-looking predictive filter, which responsive to the input data and predictive filters the input data using a first set...
7724815 Method and apparatus for a programmably terminated receiver  
A method and apparatus for a receive equalizer of a gigabit transceiver that is reconfigurable to support multiple communication standards. Communication standards having variable common mode and...
7720139 Equaliser circuit  
One embodiment of an equalizer circuit has an FIR filter 116 in the asynchronously oversampled domain with a filter coefficient adaptation module that adapts the filter coefficients to the...
7715473 Channel equalizer, method and computer program for equalizing a channel  
A channel equalizer, method and computer program for equalizing a channel. The channel equalizer may include a feed forward filter and a switching unit. The switching unit may receive a signal...
7706476 Real-time digital quadrature demodulation method and device for ultrasonic imaging system  
A real-time digital quadrature demodulation method and device for the ultrasonic imaging system are disclosed in this invention. In addition to a multiplying step and a filtering step, the method...
7702711 Reduced complexity recursive least square lattice structure adaptive filter by means of estimating the backward and forward error prediction squares using binomial expansion  
A method for reducing a computational complexity of an m-stage adaptive filter is provided by expanding a weighted sum of forward prediction error squares into a corresponding binomial expansion...