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7606339 Information handling system including adaptive interference suppression feature and method of operation  
An information handling system includes a wireless device and interference suppression apparatus that adapts to the different interference problems experienced by the wireless device when the...
7474147 Frequency shift keying signal demodulator method and apparatus  
A method and apparatus for a frequency shift keying (FSK) demodulator use a configuration to improve the autocorrelation for better receiver performance. The demodulator uses parallel first and...
7460983 Signal analysis system and calibration method  
A method and apparatus adapted to calibrate a signal path of a signal analysis system such that loading effects of the system are substantially removed from measurements of a device under test. A...
7454453 Methods, systems, and computer program products for parallel correlation and applications thereof  
A fast correlator transform (FCT) algorithm and methods and systems for implementing same, correlate an encoded data word (X 0 -X M−1 ) with encoding coefficients (C 0 -C M−1 ), wherein each of...
7418065 Multicarrier receivers and methods for detecting cyclic prefixes having unknown lengths  
A multicarrier receiver sequentially correlates two training symbols to determine a length of a cyclic prefix associated with each of the training symbols.
7340019 Programmable filter  
Briefly, in accordance with one embodiment of the invention, a programmable filter may implement an infinite impulse response filter so that a transceiver in which the filter is utilized may be...
7330522 Complementary code keying (CCK) sequentially decoding apparatus and process thereof  
An apparatus of sequentially decoding CCK codes includes a series of received signal registers used to respectively temporarily save the received signals, a phase selector used to select one...
7295624 Wireless system with hybrid automatic retransmission request in interference-limited communications  
A wireless receiver for receiving signals from an interference-limited transmitter in an interference-limited system comprising at least one transmit antenna, wherein the signals comprise a...
7161528 Device and method for the suppression of pulsed wireless signals  
The invention relates to a method of suppressing pulsed signals in particular of DME or TACAN type present in the radio signals received (Ue) by a radio-frequency receiver, characterized in that...
7039091 Method and apparatus for implementing a two dimensional correlator  
A method for managing a code sequence according to a first embodiment of the present invention is disclosed. Sets of n contiguous sample values that include sample values in a plurality of sample...
6868109 Space hopping receiving system and received radio-waves estimation method  
A receiving system or a received radio-wave estimation method is provided that can maintain received field strengths at a nearly uniform level under multipath conditions. The antenna switch can...
6862323 Low pass filters for high dynamic range wideband direct conversion receiver  
Disclosed are a low pass filter, and a direct conversion receiver (DCR) implementing the same, which filter and second signal channels with improved phase and gain match, allowing use of the filter...
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...
6775684 Digital matched filter  
A digital matched filter has a serial-to-parallel conversion circuit that converts input data fed thereto in serial form into n sets of parallel data and a plurality of delay circuits that each...
6772182 Signal processing method for improving the signal-to-noise ratio of a noise-dominated channel and a matched-phase noise filter for implementing the same  
A matched-phase noise filter includes an analog to digital converter (ADC) for receiving an analog composite, noise-dominated signal containing a signal of interest and producing a digital...
6700490 Digital detection filters for electronic article surveillance  
Digital implementation of electronic article surveillance (EAS) detection filtering for pulsed EAS systems is provided. Embodiments include direct implementation as a quadrature matched filter...
6516020 Correlator and despreading code switching method  
Despreading codes are switched at effective timings to perform despreading calculations by providing a rate difference between the first clock signal to input a spread signal to be subjected to the...
6512785 Matched filter bank  
A matched filter bank including a plurality of matched filters and a sampling and holding units commonly used by the total matched filters. Therefore, the circuit size is diminished. An inverting...
6456646 Methods and systems for detecting codewords with intersymbol interference and imperfect timing  
Methods and systems are provided whereby correlations between a received signal sample set and a plurality of potential codeword data set are determined and a potential codeword with the highest...
6445756 Peak detecting circuit for detecting a peak of a time discrete signal by an approximate function  
A peak detecting circuit capable of accurately detecting a peak of a time discrete signal without increasing a circuit scale. The peak detecting circuit detects a peak of a waveform of a time...
6366938 Reduced power matched filter using precomputation  
A technique for correlating a sequence of signal sample values with a predetermined digital code to produce correlation values for shifts in the sequence of signal sample values relative to the...
6363108 Programmable matched filter searcher  
A novel and improved method and apparatus for searching is described. Channel data is despread utilizing a matched filter structure. The in-phase and quadrature amplitudes of the despreading...
6304591 Match filter architecture based upon parallel I/O  
The present invention is a match filter architecture that is used in the Spread ALOHA Multiple Access (SAMA) receiver to facilitate the separation of individual user's data from the incoming SAMA...
6226049 NTSC rejection filter  
A receiver including an NTSC rejection filter for eliminating interference signals from a high definition signal. The ratio of the energy of an expected high definition signal to the energy of an...
6038273 Reduction of numeric counting levels in resampling  
A method and system in which the numeric values to which counters in resampling control circuitry may be reduced. As a result, smaller registers to hold such reduced numeric values may be designed...
6021419 System for filtering broadcast digital information in accordance with channel identifiers stored in preference list which can be dynamically updated via command through network  
A filter adaptor connects a computer to a network through a network connection. The network has a large plurality of broadcast type messages having a given protocol. Each of the broadcast messages...
5980097 Reduced complexity signal converter  
In a signal converter which derives from an input signal having a sample rate R/q an output signal having a larger sample rate R, the input signal is combined with a feedback signal in a subtracter...
5966684 Method and apparatus for cancelling periodic electrical interference  
A system involving method and apparatus for cancelling a periodic electrical interference signal from a signal of interest is disclosed. The system of the invention creates an estimate of the...
5960033 Matched filter  
A sample-hold circuit, which is constituted by a capacitor and a differential amplifier or a capacitor and an inversion amplifier, is provided with a first switch for short-circuiting the input and...
5928313 Method and apparatus for sample rate conversion  
An improved apparatus and method for performing sample rate conversion of digital sample values is disclosed. The sample rate conversion utilizes a finite impulse response filter that substantially...
5914987 Method of recovering symbols of a digitally modulated radio signal  
A method of recovering a finite duration of N symbols of a digitally-modulated signal, wherein a received signal is sampled at a period T 1 , generating a batch of K 1 samples, wherein K 1 is...
5887025 Matched filter acting in charge domain  
A charge mode operation circuit dedicated to detect the correlation between analog input signal and digital code, and for realizing by "RAKE method" the path diversity reception from the...
5887024 Matched filter  
The present invention provides a matched filter which can refresh an entire while keeping the speed of a calculation comparable to a small sized circuit. The first and second addition circuits of a...
5880973 Signal processing system and method for enhanced cascaded integrator-comb interpolation filter stabilization  
A signal processing system and method for stabilizing cascaded integrator-comb (CIC) interpolation filters. The signal processing system includes an overflow detection circuit and reset circuitry....
5812546 Demodulator for CDMA spread spectrum communication using multiple pn codes  
The demodulator has a plurality of matched filters in parallel. Each matched filter has a different binary PN code, a plurality of sample holders, a plurality of multipliers, an adder, and a...
5812430 Componentized digital signal processing  
A method, system and computer product for allowing efficient user interaction with digital time-based signals. User control and filter information (symbolic, procedural or a combination of both)...
5802102 Programmable two-part matched filter for spread spectrum  
A spread-spectrum-matched-filter apparatus including a code generator, a programmable-matched filter, a frame-matched filter, and a controller. The code generator generates replicas of a...
5787023 Digital filter device for electronic musical instruments  
A digital filter device, for an electronic musical instrument, comprises: filter coefficient generation means for generating a set of filter coefficients in consonance with a designated resonance...
5787024 Horizontal filter in moving picture decoding apparatus  
A horizontal filter used for converting a Moving Picture Experts Group (MPEG) source input format (SIF) picture to a CCIR 601 picture during decoding includes operating means for obtaining products...
5758138 Method and system for reducing numeric counting levels in resampling control circuitry  
A method and system in which the numeric values to which counters in resampling control circuitry may be reduced. As a result, smaller registers to hold such reduced numeric values may be designed...
5612975 Digital receiver for variable data rate communications  
A digital receiver includes a tuner and a demodulator that obtains a modulated signal carried in a received analog signal. A digital-to-analog converter operates at a preselected fixed sampling...
5574639 System and method for constructing filters for detecting signals whose frequency content varies with time  
A system and method for constructing a bank of filters which detect the presence of signals whose frequency content varies with time. The present invention includes a novel system and method for...
5448507 Reduced logic correlator  
An improved correlator or matched filter for binary coefficients is provided which reduces the amount of logic required to indicate the receipt of a predetermined code word. The matched filter...
5426670 Interference compensating circuit including a matched filter followed by a median filter  
A circuit arrangement is disclosed for reducing the adverse effects of interference in a signal of interest. The circuit arrangement includes a matched filter for receiving the signal of interest...
5313411 Adaptive receiver capable of achieving both of matched filtering function and carrier recovery function  
In an adaptive receiver comprising a primary transversal filter for filtering an input signal into a filtered signal in accordance with a plurality of tap coefficients and a decision-feedback...
5271042 Soft decision decoding with channel equalization  
In a communications network having time-dispersed signals, there is provided a mechanism for soft decision decoding. It comprises: radio reception of a time-dispersed signal, at least partly...
5247470 Method and apparatus for estimating signal components of a filter output  
An adaptive matched filter is described as a replacement for a signal replica filter of a maximum likelihood (ML) demodulator, the filter normally receiving an input data vector having signal and...
5146470 Adaptive digital filter including low-pass filter  
An adaptive digital filter for estimating a response characteristic of a signal path by monitoring a sampled output signal of the signal path, estimating a predetermined number of filter...
5101369 Digital filter capable of sample rate alteration  
A digital filter performs a predetermined arithmetic operation on input digital data inputted thereto in time-series manner by the predetermined first sampling period to thereby generate output...
5073906 Synchronization word detection apparatus  
A synchronization (sync) word detection apparatus which, on receiving a signal in which a sync word having a predetermined length (N) is inserted beforehand, detects the sync word out of a...
Matches 1 - 50 out of 76 1 2 >