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8984038 Method and system for unconstrained frequency domain adaptive filtering  
Aspects of a method and system for unconstrained frequency domain adaptive filtering include one or more circuits that are operable to select one or more time domain coefficients in a current...
8917588 Fast Fourier transform and inverse fast Fourier transform (FFT/IFFT) operating core  
An FFT/IFFT operating core capable of minimizing a required memory depth during operation is disclosed. The FFT/IFFT operating core includes an inputting buffer, a first multiplexer, an operating...
8909686 Discrete fourier calculation device, radio communication device, and discrete fourier calculation method  
A discrete Fourier calculation device includes a twiddle factor table storage unit that stores therein a twiddle factor table that associates twiddle factors with phases of the corresponding...
8898212 Methods and apparatus for reordering data  
A data reordering system for determining addresses associated with a vector of transformed data and corresponding method of reordering transformed data, where the data reordering system includes:...
8861649 Power reduction in physical layer wireless communications  
Implementations related to power reduction in physical layer wireless communications are disclosed.
8819097 Constant geometry split radix FFT  
An apparatus for performing a Fast Fourier Transform (FFT) is provided. The apparatus comprises a reorder matrix, symmetrical butterflies, and a memory. The reorder matrix is configured to have a...
8788558 Method and device for transform computation  
A method of operating a data-processing unit to produce a transform comprises calculating first and second output data values based at least on first and second input data values. The method...
8738680 Reuse engine with task list for fast fourier transform and method of using the same  
An improved processing engine for performing Fourier transforms includes an instruction processor configured to process sequential instruction software commands and a Fourier transform engine...
8718153 Signal transmitting apparatus, method thereof, and inverse fast fourier transform apparatus for signal transmitting apparatus  
The present invention relates to a signal transmitting apparatus, a method thereof, and an inverse fast Fourier transform (IFFT) apparatus for a signal transmitting apparatus. A signal...
8694570 Method and apparatus for evaluation of multi-dimensional discrete fourier transforms  
A device and method for evaluating multidimensional discrete Fourier transforms (DFT) by eliminating transpose operations by transforming every dimension concurrently. At least one computing node...
8649255 Device and method for fast fourier transform  
A device and a method for Fast Fourier Transform (FFT) are disclosed. The device includes a data receiving module, an address translation module, a data storage module, a FFT module, a data...
8639736 Method and apparatus for detecting signal using cyclo-stationary characterisitics  
A method and apparatus for detecting a signal using a cyclo-stationary characteristic value is provided. A method of detecting a signal using a cyclo-stationary characteristic value includes:...
8634486 Signal receiving apparatus, signal receiving method and signal receiving program  
A signal receiving apparatus includes: a processing unit configured to carry out Fourier transform on Fourier-transform data serving as a Fourier-transform object and carry out Fourier transform...
8612499 Method for evaluating quantum operator averages  
We describe a method for using a classical computer to generate a sequence of elementary operations (SEO) that can be used to operate a quantum computer. A quantum computer operating under such a...
8606839 Interleaved method for parallel implementation of the fast fourier transform  
A method for computing a fast Fourier transform (FFT) in a parallel processing structure uses an interleaved computation process. In particular, the interleaved FFT computation process intertwines...
8601044 Discrete Fourier Transform in an integrated circuit device  
Circuitry performing Discrete Fourier Transforms. The circuitry can be provided in a fixed logic device, or can be configured into a programmable integrated circuit device such as a programmable...
8601046 Method and apparatus for calculating an N-point discrete fourier transform  
Described embodiments provide an apparatus for calculating an N-point discrete Fourier transform of an input signal having multiple sample values. The apparatus includes at least one input...
8595278 Method and system for unconstrained frequency domain adaptive filtering  
Aspects of a method and system for unconstrained frequency domain adaptive filtering include one or more circuits that are operable to select one or more time domain coefficients in a current...
8577946 Signal receiving apparatus and communication system  
There is provided a signal receiving apparatus including first to pth stage computers configured to apply, in a step-by-step manner, butterfly operations to 2N input values; and 2N registers...
8572148 Data reorganizer for fourier transformation of parallel data streams  
A data reorganizer for Fourier Transforms, both forward and inverse, of multiple parallel data streams input to an integrated circuit, and method for use thereof, are described. The data...
8572149 Apparatus and methods for dynamic data-based scaling of data such as staged fast fourier transform (FFT) while enhancing performance  
Disclosed are apparatus and methods for dynamic data-based scaling of data. The disclosed methods and apparatus involve storing one or more input data samples, which are to be scaled and input to...
8566382 Method and apparatus for improved calculation of multiple dimension fast fourier transforms  
Apparatus and methods for storing data in a block to provide improved accessibility of the stored data in two or more dimensions. The data is loaded into memory macros constituting a row of the...
8549060 Concept for realistic simulation of a frequency spectrum  
An apparatus for simulating a signal composed of a plurality of individual signals from respective signal locations at a simulation location, having a provider for providing the plurality of...
8504601 FIR filter with reduced element count  
A finite impulse response (FIR) filter having a differential output and capable of having negative coefficients, and a method of designing the filter, is disclosed. In contrast to the prior art,...
8484277 Transforming signals using passive circuits  
Passive signal combiners are employed to transform at least one signal from one domain to another. In some aspects the transformation comprises an FFT, an IFFT, a DFT, or an IDFT. In some...
8484275 Reordering discrete fourier transform outputs  
There is provided a method for generating a table for reordering the output of a Fourier transform, the Fourier transform being performed on a predefined number of input samples, the method...
8484276 Processing array data on SIMD multi-core processor architectures  
Techniques are disclosed for converting data into a format tailored for efficient multidimensional fast Fourier transforms (FFTS) on single instruction, multiple data (SIMD) multi-core processor...
8473536 Algorithm for adiabatic pulse design using the Shinnar Le-Roux transform  
A method for providing an adiabatic RF pulse that is an inversion or refocusing pulse for a RF pulse sequence is provided. A linear phase frequency profile (Flp(ω)) is determined for the adiabatic...
RE44105 Apparatus and method for FT pre-coding of data to reduce PAPR in a multi-carrier wireless network  
A subscriber station for use in a wireless network capable of communicating according to a multi-carrier protocol, such as OFDM or OFDMA. The subscriber station comprises a size M Fourier...
8386552 Fourier transform processing and twiddle factor generation  
In a data processing system, having a twiddle factor unit, a method for performing a mixed-radix discrete Fourier transform (DFT) having a block size, N, and a maximum block size, Nmax, wherein...
8380331 Method and apparatus for relative pitch tracking of multiple arbitrary sounds  
Methods and apparatus for relative pitch tracking of multiple arbitrary sounds. A probabilistic method for pitch tracking may be implemented as or in a pitch tracking module. A constant-Q...
8375075 High-speed discrete fourier transform apparatus and method thereof  
Provided are a high-speed Discrete Fourier Transform (DFT) apparatus and a method thereof. The high-speed DFT apparatus includes a zero padding unit, a Fast Fourier Transform (FFT) unit, and a...
8363540 Pilot signal in an FDMA communication system  
A method for generating a transmit sequence in a single carrier frequency division multiple access (SC-FDMA) transmitter is disclosed. In one embodiment, the method includes generating a first...
8365104 Original data producing method and original data producing program  
A two-dimensional transmission cross coefficient is obtained based on a function representing a light intensity distribution formed by an illumination apparatus on a pupil plane of the projection...
8351525 Orthogonal frequency division multiplexing transmitting and receiving device  
An orthogonal frequency division multiplexing (OFDM) receiving apparatus, including a receiving unit, a subcarrier demodulation unit and a signal output processing unit, is provided. The receiving...
8346836 Apparatus and method for area and speed efficient fast fourier transform (FFT) processoring with runtime and static programmability of number of points  
An apparatus and method for area and speed efficient fast Fourier transform (FFT) processing comprising mapping a one-dimensional DFT to a multi-dimensional representation; re-indexing the...
8341202 Code division multiple access (CDMA) system for calculating coefficients of filter and method for filtering a received signal  
A method for calculating coefficients of a filter and a method for filtering are provided. The invention directly factorizes a specific function in a cepstrum domain by spectral factorization and...
8279978 Pilot signal in an FDMA communication system  
A method for receiving a pilot symbol in a receiver is disclosed. In one embodiment, the method includes removing a cyclic prefix from a received sequence to produce a modified sequence,...
8274726 Method for utilizing properties of the sinc(x) function for phase retrieval on nyquist-under-sampled data  
Disclosed herein are systems, methods, and non-transitory computer-readable storage media for simulating propagation of an electromagnetic field, performing phase retrieval, or sampling a...
8161093 Complex multiplier and twiddle factor generator  
The present invention relates to a complex multiplier and a twiddle factor generator. The complex multiplier according to an embodiment of the invention includes: a first adder/subtracter that...
8145695 Signal processing method and data processing method and apparatus  
The present invention discloses a signal processing method and a data processing method and apparatus. A time-domain to frequency-domain signal processing method includes: pre-processing...
8116553 Rotation invariant 2D sketch descriptor  
A system, method, and computer program for determining a descriptor, comprising calculating a maximum distance for a plurality of points in a sector between each of said plurality of points and an...
8005315 Spectrum spreading signal demodulation method and apparatus  
A spread spectrum signal demodulating method whereby spread-code synchronous acquisition and carrier synchronous acquisition are performed using FFT at high speed, wherein a received signal, of...
8000228 Pilot signal in an FDMA communication system  
Methods (500, 800) and corresponding systems (100, 200, 300, 400, 900) for generating a pilot symbol (330) include providing an M-point parallel transform sequence that is a discrete Fourier...
7995860 Spectrum spreading signal demodulation method and apparatus  
A spread spectrum signal demodulating method whereby spread-code synchronous acquisition and carrier synchronous acquisition are performed using FFT at high speed, wherein a received signal, of...
RE42070 Apparatus and method for radial and angular or rotational analysis of images for shape content and matching  
A segmented radial spatial light modulator has an active optic area comprising a plurality of radially extending active optic modulators disposed at various angular orientations with respect to a...
7852955 Orthogonal frequency division multiplexing transmitting and receiving method and device thereof  
An orthogonal frequency division multiplexing (OFDM) transmitting apparatus including a signal processing unit, a subcarrier orthogonalization processing unit, and a transmitting unit is provided....
7817733 Method and system for peak power reduction  
A system (100) and method (400) for peak limiting suitable for use in a communication system is provided. The method can include modulating (402) a symbol vector to produce a modulated waveform...
7808886 Pilot signal in an FDMA communication system  
Methods (500, 800) and corresponding systems (100, 200, 300, 400, 900) for generating a pilot symbol (330) include providing an M-point parallel transform sequence that is a discrete Fourier...
7793013 High-speed FIR filters in FPGAs  
Methods, circuits, and an apparatus for filtering high-speed serial data is disclosed. In one embodiment, a Programmable Logic Device (PLD) is configured with a filter circuit for filtering serial...

Matches 1 - 50 out of 164 1 2 3 4 >