Matches 1 - 50 out of 120 1 2 3 >
Match Document Document Title
7620673 Complimentary discrete fourier transform processor  
Method and apparatus for a complimentary discrete Fourier transform processor. An input signal is sampled, samples then being sequentially delayed, channelized, and processed. Synthesized outputs...
7603401 Method and system for on-line blind source separation  
A method and apparatus is disclosed for performing blind source separation using convolutive signal decorrelation. For a first embodiment, the method accumulates a length of input signal (mixed...
7574313 Information signal processing by modification in the spectral/modulation spectral range representation  
Processing of information signals separated according to modulation and carrier components in a more controlled way is made possible by a device for processing an information signal including a...
7502816 Signal-processing apparatus and method  
First and second coefficients are fed into a Fast Fourier Transform unit through real number input and imaginary number input portions thereof, respectively, to perform the Fast Fourier Transform...
7486609 European digital audio broadcast receiver having a simply implementable fast fourier transform processor and an operation method therefor  
Disclosed is a European digital audio broadcast receiver having a simply implementable fast Fourier transform processor and an operation method therefor. A digital audio broadcast receiver having...
7461114 Fourier transform apparatus  
A Fourier transform apparatus whose pipeline width is independent of transform point number of individual pipeline FFT circuits in each stage and composed of a preceding stage and a succeeding...
7376173 Unambiguously encoding and decoding signals for wireless channels  
A method encodes a sequence of blocks of input bits to be transmitted over a wireless channel. Each block of input bits is converted to a codeword, and each codeword is mapped to multiple...
7323673 Modulated laser light detector with discrete fourier transform algorithm  
A modulated laser light detector that converts laser light energy into electrical signals which exhibit a frequency that is substantially the same as the laser light modulation frequency, in which...
7227902 Method and apparatus for digital channelisation and de-channelisation  
The present invention relates generally to the problem of filtering, decimation or interpolation and frequency conversion in the digital domain, and more particularly to its use in wideband...
7197095 Inverse fast fourier transform (IFFT) with overlap and add  
A system for efficiently filtering interfering signals in a front end of a GPS receiver is disclosed. Such interfering signals can emanate from friendly, as well as unfriendly, sources. One...
7146394 Watermark detection  
An improved method and arrangement for detecting a watermark in an information (e.g. image or video) signal are disclosed. The detection is more reliable and less vulnerable to image processing by...
7120659 Apparatus, methods, and computer program products for determining the coefficients of a function with decreased latency  
The present invention provides apparatus, methods, and computer program products that can decrease the latency with which the coefficients of a function representative of signal are determined....
7120658 Digital systolic array architecture and method for computing the discrete Fourier transform  
A more computationally efficient and scalable systolic architecture is provided for computing the discrete Fourier transform. The systolic architecture also provides a method for reducing the array...
7092429 Multi-pass frequency hop-acquisition correlator  
A multi-pass frequency hop timing acquisition correlator that produces a more accurate time estimate from the fast acquisition frequency hop signal is disclosed. The time estimate produced by the...
7035867 Determining redundancies in content object directories  
A system for identifying files can use fingerprints to compare various files and determine redundant files. Frequency representations of portions of files can be used, such as Fast Fourier...
7028064 Optimized discrete fourier transform method and apparatus using prime factor algorithm  
An apparatus and method for DFT processing using prime factor algorithm (PFA) on a selected number P of midamble chip values received by a CDMA receiver, where P has a plurality M of relatively...
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...
6898612 Method and system for on-line blind source separation  
A method and apparatus is disclosed for performing blind source separation using convolutive signal decorrelation. For a first embodiment, the method accumulates a length of input signal (mixed...
6839471 Extended discrete fourier transform and parametric image algorithms  
Computation of the Extended Discrete Fourier Transform (XDFT) for N×N input data (corresponding to an N×N image) gives additional information about each point in the image. This additional...
6782095 Method and apparatus for performing spectral processing in tone detection  
A general purpose network tone detection method and apparatus that allows the precise and accurate recognition of North American tones (MF, DTMF (Dual-Tone Multifrequency), and CPT (Call Progress...
6779014 Cyclic step by step decoding method used in discrete fourier transform cyclic code of a communication system  
Discrete Fourier transformation is applied to an analog system so that a signal be transfering, the analog data can be corrected before being quantized and after being transferred and received. In...
6751641 Time domain data converter with output frequency domain conversion  
A time domain data converter with output frequency domain conversion. A data conversion circuit is operable to receive a signal in the time domain and provide an output in the frequency domain. It...
6721708 Power saving apparatus and method for AC-3 codec by reducing operations  
The present invention provides a method and apparatus for performing an inverse modified discrete cosine transform (IMDCT) on at least one block of spectral coefficients representing an information...
6714881 Time reference compensation for improved metering accuracy  
A method for time reference compensation in a power metering system, the method comprising monitoring a time-dependent characteristic of incoming AC power over a predetermined local time interval,...
6611855 Flexible and efficient channelizer architecture  
A digital channelizer/de-channelizer architecture that, with a minimum amount of hardware, is capable of dynamically adapting to changing system requirements. Preferably, the digital...
6519541 Multiple frequency signal detector  
A method for characterizing a dual frequency (DF) signal including the steps of sampling the signal at a sampling frequency v s so as to obtain a sequence of signal samples, and obtaining an...
6509866 Fast chirp transform  
A Fast Chirp Transform (FCT) for the digital processing of chirp signals and exemplary applications. The FCT is a generalization of a multidimensional Fast Fourier Transform. Phase coefficients for...
6477553 Measurement scale for non-uniform data sampling in N dimensions  
A method for sampling a signal for signal processing, such as calculating the coefficients of a Fourier or other transform of the signal. The sampling occurs at sampling points which are the union...
6393451 Flexibility enhancement to the modified fast convolution algorithm  
The present invention increases the flexibility of the modified fast convolution algorithm. In a first exemplary embodiment of the present invention, a block compensator is inserted into the...
6393066 Efficient digital channelizer system and method of operation thereof  
The invention is a digital channelizer and a process for dividing an input bandwidth into at least some of N channels. A digital channelizer which divides an input bandwidth into at least some of N...
6389169 Intelligent systems and methods for processing image data based upon anticipated regions of visual interest  
Systems and methods for performing intelligent image processing. Image processing systems and methods in accordance with the present invention may select algorithms for processing collections of...
6356569 Digital channelizer with arbitrary output sampling frequency  
A digital channelizer employs a polyphase filter element in which a shift register is used to commutate time series data to a bank of polyphase filters at the inputs of an FFT module. The filter...
6351759 Digital channelizer having efficient architecture for discrete fourier transformation and operation thereof  
The invention is an apparatus and process for performing a discrete Fourier transform and a digital channelizer which divides an input bandwidth into at least some of N channels. An apparatus for...
6349118 Digital channelizer having efficient architecture for cyclic shifting and method of operation thereof  
The invention is a digital channelizer and a process for dividing an input bandwidth into at least some of N channels. A digital channelizer which divides an input bandwidth into at least some of N...
6330287 Digital channelizer having efficient architecture for window presum using distributed arithmetic for providing window presum calculations in one clock cycle  
A digital channelizer and a process for dividing input bandwidth into at least some of N channels are disclosed. The digital channelizer which divides an input bandwidth into at least some of N...
6327603 Digital channelizer having efficient architecture for presum discrete fourier transformation selectively of real or complex data and method of operation  
A digital channelizer and a process for dividing an input bandwidth into at least some of N channels are disclosed. A digital channelizer which divides an input bandwidth into channels in...
6247035 Reduced complexity and increased flexibility modified fast convolution algorithm  
A modified fast convolution algorithm may be enhanced in order to increase the flexibility of the algorithm. In an exemplary embodiment of the present invention, a folding unit is introduced as a...
6237012 Orthogonal transform apparatus  
An orthogonal transform apparatus has: orthogonal transform circuit for performing n-dimensional s-order (n and s are natural numbers) orthogonal transform, modified-information control circuit...
6236838 System for superresolution based estimation of control signals in a communications system  
A system for wireless communication between a base station 30 and one or more remote stations 32 and 34 wherein a desired signal has associated therewith an identifier tone (a SAT in the vernacular...
6208946 High speed fourier transform apparatus  
A high-speed discrete Fourier transform (DFT) apparatus utilizes a processor operating in parallel with data acquisition to calculate terms of a Fourier transform corresponding to the incoming...
6195675 Tone detection using discrete fourier transform techniques  
Supervisory audio tone (SAT) in a receive signal in a wireless communications system is detected using a discrete Fourier transform (DFT) supplied with samples of a filtered and decimated signal...
6167417 Convolutive blind source separation using a multiple decorrelation method  
A method and apparatus that performs blind source separation using convolutive signal decorrelation. More specifically, the method accumulates a length of input signal (mixed signal) that includes...
6141673 Microprocessor modified to perform inverse discrete cosine transform operations on a one-dimensional matrix of numbers within a minimal number of instructions  
A multimedia extension unit (MEU) is provided for performing various multimedia-type operations. The MEU can be coupled either through a coprocessor bus or a local central processing unit (CPU) bus...
6023719 Signal processor and method for fast Fourier transformation  
With reference to FIG. 1 signal processor (10) for performing transformations of sets of input data points comprises a memory for storing a first half input data points and a second half input data...
6006245 Enhanced fast fourier transform technique on vector processor with operand routing and slot-selectable operation  
An apparatus and a method perform an N-point Fast Fourier Transform (FFT) on first and second arrays having real and imaginary input values using a processor with a multimedia extension unit (MEU),...
6005900 Wideband channelization using subsampled discrete fourier transforms  
A receiver and channelizer for processing a wideband signal is disclosed. The channelizer consists of a receiver for receiving a wideband signal. The received wideband signal is processed by a...
5999573 Wideband channelization with variable sampling frequency  
A channelizer for processing a wideband signal to extract a plurality of narrowband signals is disclosed. The channelizer is capable of processing a received wideband signal to extract a plurality...
5968112 Signal processor and method for Fourier Transformation  
Parallel signal processor (10) (FIG. 2) performs a Fourier Transformation of an input signal; The transformation coefficients are converted once to logarithmic form and stored in a cache memory....
5946293 Memory efficient channel decoding circuitry  
A memory efficient channel decoder circuit is provided for channel decoding differentially modulated data samples comprising multiple adjacent carriers each including two data samples associated...
5909656 Protective relay with improved DFT function  
A method for applying a modified Discrete Fourier Transform (DFT) in a protective relaying system involves five basic steps: The first step, S1, comprises measuring voltage and current time-domain...
Matches 1 - 50 out of 120 1 2 3 >