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7039665 Efficient reconstruction  
Efficient reconstruction of a discrete signal in a range from subband coefficients of multirate analysis filtering translates the range into required input coefficient ranges and minimizes...
7035776 Low noise to signal evaluation  
The invention provides for improved signal to noise ratios in evaluation techniques. This is done by acquiring a signal, processing it to obtain a complex form thereof, obtaining a filtering...
7035888 Digital sampling rate converter for compensation for drop of in-band signal  
Disclosed is a digital sampling rate converter for compensating for a drop of an in-band signal, the digital sampling rate converter including a CIC (Cascaded Integrator-Comb) decimator for...
7035328 Method of slewing a digital filter providing filter sections with matched gain  
A method is provided of slewing a bandwidth characteristic of a digital filter within a range between a first bandwidth characteristic and a second bandwidth characteristic. The digital filter...
7031890 Method and apparatus for estimating state parameter in nonlinear discrete time system  
A method and apparatus for estimating a state parameter in a nonlinear discrete time system are provided. The method for estimating a state parameter has the steps of (a) predicting a state...
7027538 Method and system for joint decision feedback equalization and complementary code key decoding using a trellis  
A method and system for performing joint equalization and decoding of Complementary Code Key (CCK) encoded symbols. The system comprises: a decision feedback equalizer (DFE) structure for...
7028062 FIR filter, method of operating the same, semiconductor integrated circuit including FIR filter, and communication system for transmitting data filtered by FIR filter  
The FIR filter separately receives input data consisting of transmitting information and composed of bit strings, and additional data which is added in order to transmit the input data. The input...
7028060 Method and apparatus for jointly optimizing linear signal processing filters with subband filters  
A method, apparatus, and a computer program product for generating a set of jointly optimized linear signal processing filters and subband filters for processing digital data on a computer system...
7027498 Data adaptive ramp in a digital filter  
A system and method for improving the performance of digital filters. The data bandwidth and spectral control are improved by adaptively selecting ramp-up and ramp-down symbols based on the actual...
7023938 Receiver for discrete multitone modulated signals having window function  
A receiver for improving the performance of conventional Discrete Multitone Modulation (DMT) based Asymmetric Digital Subscriber Line (ADSL) modems, in the presence of noise and/or interference. A...
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...
7013274 Speech feature extraction system  
The present invention provides a speech feature extraction system suitable for use in a speech recognition system or other voice processing system that extracts features related to the frequency...
7010414 Method for reducing computational time for calculating a noise-filtered average approximation of throttle position  
A method for reducing computational time for calculating a noise-filtered average approximation of a throttle position in an automotive environment. During controller initialization, an initial...
7010556 Antenna treatment method and system  
The ratio of useful-signal power to the power of interference signals at an antenna (ANT) having plural sensors, and at least one sensor is obtained by filtering the antenna output signal with a...
7007053 Area efficient realization of coefficient architecture for bit-serial FIR, IIR filters and combinational/sequential logic structure with zero latency clock output  
An area-efficient realization of a coefficient block includes hardware sharing techniques and optimizations applied to this block. The block is connected to coefficient lines coming from a delay...
6998906 Low pass filter systems and methods  
Systems and methods are disclosed herein to provide low pass filters. For example, in accordance with an embodiment of the present invention, a synchronous low pass filter is disclosed. The filter...
6996592 Discretization processing method of transfer function in continuous time systems, system and program therefor, and compensator and feedback control system using the same  
A discretization processing method for transforming a transfer function in continuous time systems to a transfer function in discrete time systems is disclosed. To obtain the new transfer...
6993464 Optimized filter parameters design for digital IF programmable downconverter  
The present invention discloses a method for finding an optimized filter parameters design to meet input specifications and hardware constraints in accordance with a typical single channel digital...
6988116 Method of designing polynomials for controlling the slewing of adaptive digital films  
A method for deriving a polynomial for generating filter coefficients to be used in a digital filter in an electronic unit having a digital signal processor. The digital filter has a plurality of...
6985522 Variable-gain digital filter  
A variable-gain digital filter includes a selector and multiplier arranged inside the digital filter for regulating gain whereby the number of bits of filter input is X, the number of flip-flops...
6983299 Programmable digital filter implementation for loss-of-signal detection for serial communications applications  
A circuit generally comprising a first circuit and a second circuit. The first circuit may be configured to (i) detect a state of an input signal and (ii) present a plurality of intermediate...
6973403 Method and system for identification of system response parameters for finite impulse response systems  
Methods and systems for determining characteristics of a Finite Impulse Response system that can include applying a number of identical sets of probe signals to the system and averaging the...
6970895 Programmable delay indexed data path register file for array processing  
A delay addressed data path register file is designed for use in a programmable processor making up a cell in a multi-processor or array signal processing system. The delay addressable register...
6968352 Device for digital processing with frequency filtering and reduced computation complexity  
A device for processing digital data. A module (M2, M3) produces on a data vector of the frequency domain Z(k), wherein K varies from 0 to N−1, a convolution with a function U, convolution which...
6961742 Signal adaptive filter bank optimization  
A method for finding optimal filter coefficients for a filter given an input data sequence and an objective function is disclosed. The method includes selecting a wavelet basis having k parameters...
6954509 Method for channel equalization  
A method for channel equalization of received data includes steps of: receiving the received data in a received data packet; calculating filter setting coefficients for an input filter and...
6952709 Receiver, programmable circuit and method of calculating digital filters  
The invention offers a method of calculating digital filters enabling to multiplex various different filters with the aid of a programmable co-processor circuit comprising a calculation element...
6947509 Oversampled filter bank for subband processing  
An oversampled filter bank structure that can be implemented using popular and efficient fast filter banks to allow subband processing of an input signal with substantially reduced aliasing...
6944244 Mechanism for OFDM equalizer tap initialization using an adaptive algorithm  
A method for initializing an equalizer in an Orthogonal Frequency Division Multiplexing (“OFDM”) receiver includes generating a desired equalizer tap setting based on an adaptive algorithm. An...
6944220 Circuit configuration for the offset compensation of a signal  
For the offset compensation of a digital signal, particularly of a communication signal transmitted in a cordless digital communication system, a recursive digital filter is used. The recursive...
6944640 Progressive two-dimensional (2D) pyramid filter  
Implementations of a progressive two-dimensional pyramid filter bank are disclosed including a method of adding a first and a last input signal sample to a sum of input samples of a next lower-tap...
6941333 Digital signal processing apparatus and method  
A normalizer normalizes the power of a dither signal calculated by a power calculator based on the average power of a PCM signal in the range of 18 kHz to 20 kHz, wherein the average power is...
6940896 Method for seamlessly combining adjacent filters in a frequency channelizer  
An improved method is provided for seamlessly combining adjacent subchannels in a signal processing system. Each adjacent subchannel is defined to include a first and a second linear phase digital...
6928111 Method and apparatus for controlling equalizer using sync signal in digital vestigial sideband system  
An equalizer is controlled using a sync signal in a digital vestigial sideband system is provided, in which the sync signal is accurately separated even though a ghost having a short delay time...
6920471 Compensation scheme for reducing delay in a digital impedance matching circuit to improve return loss  
A simple, power efficient and inexpensive digital compensation scheme for reducing delay in a digital impedance matching circuit to improve return loss. The scheme employs a digital filter to...
6920470 Signal processing integrated circuit  
A low power programmable digital filter integrated circuit architecture has a programmable front end servicing up to 4 digital sources. Changing the programming of the front end permits digital...
6915264 Cochlear filter bank structure for determining masked thresholds for use in perceptual audio coding  
A method and apparatus for determining masked thresholds for a perceptual auditory model used, for example, in a perceptual audio coder, which makes use of a filter bank structure comprising a...
6904179 Method for minimal-logic non-linear filter implementation  
A method for implementing a filter on a signal is disclosed wherein interval membership information is computed and stored in such a manner so as to use a minimal amount of memory thereby allowing...
6904444 Pseudo-median cascaded canceller  
An adaptive signal processing system utilizes a pseudo-median cascaded canceller to compute a set of complex adaptive weights and generate a filtered output signal. The system includes a plurality...
6898214 Technique for monitoring SONET signal  
A technique for performance-monitoring of a standard SONET signal involves first converting the optical signal to an electrical signal, removing in the framing signal time slot the framing signal...
6877021 Calculation method and apparatus  
A method of reducing the amount of computer memory utilized in calculating a formula on a collection of a plurality of series of data values, the method including the steps of: (a) for each data...
6868431 Circuit and method for processing data  
A Finite Impulse Response (FIR) filter circuit (60) includes delay elements (63, 64, 66), multipliers (71, 72, 73, 74), a summing device (78), and a digital integrator (69) at the output of the...
6862558 Empirical mode decomposition for analyzing acoustical signals  
The present invention discloses a computer implemented signal analysis method through the Hilbert-Huang Transformation (HHT) for analyzing acoustical signals, which are assumed to be nonlinear and...
6822227 Time-of-flight mass spectrometry utilizing finite impulse response filters to improve resolution and reduce noise  
A mass spectrometer having an ion accelerator and an ion detector utilizing a finite impulse response filter is disclosed. The ion accelerator generates an ion pulse in response to a start signal....
6816621 Method for generating shift-invariant filters  
A novel method is presented for implementing a filter for processing a discrete signal having the steps of first obtaining a plurality of sample values from the discrete signal; then using each...
6809777 Pixel calculating device  
A pixel calculating device for performing vertical filtering that includes 16 pixel processing units 1 to 16 and an input buffer group 22 storing 16 pieces of pixel data and filter coefficients....
6792444 Filter devices and methods  
A filtering method is proposed wherein first several filtering steps (I-III, IV-VI) are made. Each step (I-III,IV-VI) includes: generating a filtered signal (I,IV), rounding this filtered signal...
6782404 Jitter tolerance improvement by phase filtration in feed-foward data recovery systems  
Over-sampled timing signal jitter tolerance is improved in a q-times over-sampled architecture by phase-sampling the timing signal to produce a plurality of input phase samples φin, where φinε{φ1,...
6782297 Methods and apparatus for data smoothing  
A method and apparatus for smoothing data comprises adjusting data according to a first smoothing technique and selectively adjusting the data according to a second smoothing technique. The method...
6778710 Method for generating increasing shift-invariant filters  
A novel method for implementing a filter for processing discrete signal image is presented having the steps of first obtaining a plurality of sample values from said discrete signal image and then...