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7372386 Parallel digital-to-analog-converter  
A method for performing parallel digital-to-analog conversion of an n-bit digital input data signal at a frequency of f s including receiving the n-bit digital input data signal; generating M−1...
7116698 Generator of repetitive sets of spread spectrum sequences  
A generator of repetitive sets of spreading sequences comprising element ( 20 ), for counting and for forming an address and a table ( 30 ) containing L sets of S sequences, wherein the address...
7031369 Orthogonal code generating circuit  
An orthogonal code generating circuit 10 is arranged by a counter circuit unit 12 , a combination circuit unit 14 of orthogonal codes, and a control circuit unit 16 . Furthermore, the...
7003536 Reduced complexity fast hadamard transform  
A method and apparatus for performing a radix-4 fast Hadamard transform (FHT) with reduced complexity and for directly determining the maximum output of a fast Hadamard transform using either a...
6996163 Walsh-Hadamard decoder  
In one embodiment, a Walsh-Hadamard decoder can have a hardware efficient Fast Hadamard Transform (“FHT”) engine. In one embodiment, the FHT engine can include an input to receive an input...
6993541 Fast hadamard peak detector  
A method and apparatus for performing a radix-4 fast Hadamard transform (FHT) with reduced complexity and for directly determining the maximum output of a fast Hadamard transform using either a...
6766342 System and method for computing and unordered Hadamard transform  
A system and method for parallel computation of the unordered Hadamard transform. The computing system includes a plurality of interconnected processors and corresponding local memories. An input...
6732130 Fast hadamard transform device  
A fast Hadamard transform device is provided which prevent from increasing of circuit scale and shorten a developing TAT even if the number of bits to be operated. The device includes n of shift...
6505224 System and computer-implemented method for performing multi-stage fast Walsh transform  
A system for generating a Walsh transform output vector from an “N”-component input vector includes a vector store, a plurality of Walsh transform kernels and a control module. The vector store...
6311202 Hardware efficient fast hadamard transform engine  
A Fast Hadamard Transform apparatus having a plurality of transform stages, such as would be employed by a wireless telecommunication system for detecting and correcting errors that occur during...
6304196 Disparity and transition density control system and method  
A system and method for encoding and decoding data utilizes Walsh-Hadamard Transforms and inversion techniques to generate the possible minimum disparity values for the data to be encoded. A...
6115410 Walsh code generator, signal transmitting apparatus and signal reception apparatus  
A Walsh code generator capable of performing signal processing at a high speed using the codewords of the Walsh code. A binary counter 3 generates a count signal counting upper (n-m) digits of a...
6028889 Pipelined fast hadamard transform  
A pipelined Fast Hadamard Transform ("FHT") architecture is disclosed that comprises log 2 N identical pipeline stages, which are ideally suited for implementation in application-specific...
6006246 Method of and apparatus for multiplying matrix data  
A constant matrix [TS] is resolved into three constant matrices [TSC], [TSB], [TSA]. 1st.about.16th rows of the constant matrix [TSC] are calculated by a first stage of additions/subtractions...
5856935 Fast hadamard transform within a code division, multiple access communication system  
In a receiver (10) of a code division multiple access system, a method of processing a received signal including reading a first and second data item from a first memory (50), at least one of the...
5784293 Apparatus and method for determining transmitted modulation symbols  
A receiver (100) employs an apparatus (109) and method (500) for determining transmitted modulation symbols contained in a received communication signal (127). Each of a plurality of memory...
5729124 Estimation of signal frequency using fast walsh transform  
A method of frequency estimation is disclosed which uses a Fast Walsh Transform (FWT) in place of a conventional Fast Fourier Transform (FFT) technique. The inventive method is based on a linear...
5726925 Hadamard transformer using memory cell  
A Hadamard transformer is disclosed which uses memory cells in a digital signal processor for restoring to the original signals at a receiving end from the signals which have been transformed to a...
5644523 State-controlled half-parallel array Walsh Transform  
A matrix multiplier for performing a Fast Walsh Transform (FWT) is disclosed, based on Good's factorization of the FWT. The matrix multiplier has a plurality of N inputs for receiving N input...
5619270 Sample rate converter and sample rate conversion method  
The invention is a sample rate converter, which converts input sample values of a signal digitized with a first predetermined clock frequency into desired sample values at a second virtual sample...
5563818 Method and system for performing floating-point division using selected approximation values  
A method and system for performing floating-point division of a dividend by a divisor within a floating-point unit having multiply and add functions are disclosed. In performing floating-point...
5454048 Apparatus for multiplexed imaging using optically-generated Kronecker products  
A new type of fully-multiplexed imaging device is described for use at wavelengths where efficient focal plane array detectors are unavailable. It shares some properties in common with the familiar...
5357454 Fast walsh transform processor  
A processor for generating a Walsh transform by substantially simultaneously calculating M combinations of M input values, wherein M=2 N and the input values are two's-complement binary values,...
5311176 Method and apparatus for generating Walsh codes  
A method and apparatus is provided for generating Walsh codes. A first group of address signals is generated. Subsequently, inversion control signals are generated by logically gating the first...
5235614 Method and apparatus for accommodating a variable number of communication channels in a spread spectrum communication system  
A method and apparatus is provided for transmitting spread spectrum signals. The transmitter receives data symbols. Subsequently, the transmitter splits each particular set of two received data...
5008848 Circuit for performing S-transform  
An improved circuit for performing the S-transform and inverse S-transform on digital images. Data is fed back so that only one stage of adder/subtracters is required. The circuit elements have...
4892370 Means and method for implementing a two-dimensional truth-table look-up holgraphic processor  
Algorithms and optical processor architectures for implementing a two-dimensional truth-table look-up processor are disclosed. An optical holographic medium stores the spectral expansion...
4839844 Orthogonal transformer and apparatus operational thereby  
Apparatus for obtaining an orthogonal transformer for use in signal analysis. This apparatus is especially useful in cepstral analysis where vocal tract characteristics of a signal are separated...
4673917 Method and apparatus for minimizing digital-to-analog converter correction trims  
A method of calibrating a feed forward, DAC post-correction system. The method includes fitting the Walsh co-efficiencts of a DAC transfer function to a straight line in the log domain. The...
4639857 Digital data processor incorporating an orthogonally connected logic cell array  
The invention provides a digital data processor which has been systemetized down to bit level. The processor includes a regular array of identical processing cells which perform a logic operation...
4621337 Transformation circuit for implementing a collapsed Walsh-Hadamard transform  
A unit transformation circuit transforms three discrete input signals into a set of transform coefficient signals characteristic of a "collapsed" Walsh-Hadamard transform. The unit transformation...
4590608 Topographic feature extraction using sensor array system  
A method and apparatus for topographic feature extraction by masking a video signal representation of an optical image using a two-dimension Walsh function is disclosed. The optical energy of an...
4553165 Transform processing method for reducing noise in an image  
An improved image processing method reduces noise in a sampled image while minimizing unintended distortion of image features. Image signals are generated representative of the light value of...
4549212 Image processing method using a collapsed Walsh-Hadamard transform  
An improved image processing method uses a modified Walsh-Hadamard transform to remove noise and preserve image structure in a sampled image. Image signals representative of the light value of...
4499550 Walsh function mixer and tone detector  
A mixer stage having particular application to digital detectors. The mixer stage includes first and second sets of transmission gates and a Walsh function generator. The first set of transmission...
4463377 Arrangement for storing or transmitting and for recovering picture signals  
In the conventional transformation coding of pictures the value ranges of the coefficients then produced are extended during the performance of the individual arithmetical steps. As a result...
4460969 Image spectrum analyzer for cartographic feature extraction  
An image spectrum analyzer and method for cartographic feature extraction comprising an image, means for generating a Walsh function light pattern and for illuminating the image with the Walsh...
4446530 Fast hadamard transform device  
Devices for performing fast Hadamard transforms based upon a predetermined algorithm are provided. A buffer memory (random-access memory) with the capacity equal to the number of components of an...
4388726 System for the ultra-high frequency transmission of numerical data  
A system for communicating numerical data over an UHF radio channel including a transmitter and receiver. The transmitter includes an UHF oscillator whose frequency is modulated by binary...
4335373 Method for analyzing a digital-to-analog converter with a nonideal analog-to-digital converter  
A method for statistically calibrating a digital-to-analog converter with an electronic test system. The digital-to-analog converter is excited with two state signals at each input bit which...
4300182 Metering and protection system for an A.C. power system  
A system for electronically metering an A.C. electrical power system to derive performance parameters such as real and reactive power useful in revenue metering and fault protection applications....
4261043 Coefficient extrapolator for the Haar, Walsh, and Hadamard domains  
In a data compression system utilizing the Haar, Walsh or Hadamard transformation, a machine which operates in the transform domain to obtain approximations to the higher order transform...
4055756 Image coder-decoder using a matrix transform with weighted contribution of several points of the image to the formation of one point of the transform  
A matrix transform system for coding and decoding images. The system comprises means for sampling the lines and the columns of an image and forming with these samples a sample square matrix and...
4052565 Walsh function signal scrambler  
A digital speech scrambler system allowing for the transmission of scrambled speech over a narrow bandwidth by sequency limiting the analog speech in a low-pass sequency filter and thereafter...
4038539 Adaptive pulse processing means and method  
A signal processing means and method of adaptively filtering input signals received at a terminal means in which the input signals include pulse signals and noise, with the pulse signals occurring...
4001564 Communication system for disseminating coded digital data in analogue form utilizing an orthogonal transformation  
The present invention relates to the dissemination of binary digital data by analogue transmission or storage. The object of the invention is a communication system in which, prior to...
3981443 Class of transform digital processors for compression of multidimensional data  
A method and apparatus is presented for digitally implementing a class of transforms for the purpose of processing data in real time based on decomposing data vectors into sets of coefficients...
3956619 Pipeline walsh-hadamard transformations  
A machine for generating sequency ordered Walsh transform coefficients from an input data sequence comprises an ordered cascade of identically configured signal processor modules. Each module...
3925646 Information and process control enhancement system employing series of square wave components  
An input signal is spectrally decomposed into a plurality of square waves each defined as a given Walsh function, while a second signal, representative of a desired or undesired element in the...
3887798 Generator of pulse trains corresponding to walsh functions  
To generate pulse trains corresponding to the binary representation of numbers in the so-called Walsh code, the numbers ranging from 1 to m-1 where m = 2 k +1 , a logic network RC1 with k+1 inputs...
Matches 1 - 50 out of 56 1 2 >