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Class Information
Number: 708/405
Name: Electrical computers: arithmetic processing and calculating > Electrical digital calculating computer > Particular function performed > Transform > Fourier > Discrete fourier transform (i.e., dft)
Description: Subject matter wherein the transformation performed is a Discrete Fourier Transform.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7620673 |
Complimentary discrete fourier transform processor |
Nov. 17, 2009 |
| 7603401 |
Method and system for on-line blind source separation |
Oct. 13, 2009 |
| 7574313 |
Information signal processing by modification in the spectral/modulation spectral range representation |
Aug. 11, 2009 |
| 7502816 |
Signal-processing apparatus and method |
Mar. 10, 2009 |
| 7486609 |
European digital audio broadcast receiver having a simply implementable fast fourier transform processor and an operation method therefor |
Feb. 3, 2009 |
| 7461114 |
Fourier transform apparatus |
Dec. 2, 2008 |
| 7376173 |
Unambiguously encoding and decoding signals for wireless channels |
May. 20, 2008 |
| 7323673 |
Modulated laser light detector with discrete fourier transform algorithm |
Jan. 29, 2008 |
| 7227902 |
Method and apparatus for digital channelisation and de-channelisation |
Jun. 5, 2007 |
| 7197095 |
Inverse fast fourier transform (IFFT) with overlap and add |
Mar. 27, 2007 |
| 7146394 |
Watermark detection |
Dec. 5, 2006 |
| 7120658 |
Digital systolic array architecture and method for computing the discrete Fourier transform |
Oct. 10, 2006 |
| 7120659 |
Apparatus, methods, and computer program products for determining the coefficients of a function with decreased latency |
Oct. 10, 2006 |
| 7092429 |
Multi-pass frequency hop-acquisition correlator |
Aug. 15, 2006 |
| 7035867 |
Determining redundancies in content object directories |
Apr. 25, 2006 |
| 7028064 |
Optimized discrete fourier transform method and apparatus using prime factor algorithm |
Apr. 11, 2006 |
| 6973403 |
Method and system for identification of system response parameters for finite impulse response systems |
Dec. 6, 2005 |
| 6898612 |
Method and system for on-line blind source separation |
May. 24, 2005 |
| 6865589 |
Watermark detection |
Mar. 8, 2005 |
| 6839471 |
Extended discrete fourier transform and parametric image algorithms |
Jan. 4, 2005 |
| 6782095 |
Method and apparatus for performing spectral processing in tone detection |
Aug. 24, 2004 |
| 6779014 |
Cyclic step by step decoding method used in discrete fourier transform cyclic code of a communication system |
Aug. 17, 2004 |
| 6751641 |
Time domain data converter with output frequency domain conversion |
Jun. 15, 2004 |
| 6735610 |
Apparatus, methods, and computer program products for determining the coefficients of a function with decreased latency |
May. 11, 2004 |
| 6721708 |
Power saving apparatus and method for AC-3 codec by reducing operations |
Apr. 13, 2004 |
| 6714881 |
Time reference compensation for improved metering accuracy |
Mar. 30, 2004 |
| 6704760 |
Optimized discrete fourier transform method and apparatus using prime factor algorithm |
Mar. 9, 2004 |
| 6611855 |
Flexible and efficient channelizer architecture |
Aug. 26, 2003 |
| 6519541 |
Multiple frequency signal detector |
Feb. 11, 2003 |
| 6509866 |
Fast chirp transform |
Jan. 21, 2003 |
| 6505223 |
Watermark detection |
Jan. 7, 2003 |
| 6477553 |
Measurement scale for non-uniform data sampling in N dimensions |
Nov. 5, 2002 |
| 6393451 |
Flexibility enhancement to the modified fast convolution algorithm |
May. 21, 2002 |
| 6393066 |
Efficient digital channelizer system and method of operation thereof |
May. 21, 2002 |
| 6389169 |
Intelligent systems and methods for processing image data based upon anticipated regions of visual interest |
May. 14, 2002 |
| 6356569 |
Digital channelizer with arbitrary output sampling frequency |
Mar. 12, 2002 |
| 6351759 |
Digital channelizer having efficient architecture for discrete fourier transformation and operation thereof |
Feb. 26, 2002 |
| 6349118 |
Digital channelizer having efficient architecture for cyclic shifting and method of operation thereof |
Feb. 19, 2002 |
| 6330287 |
Digital channelizer having efficient architecture for window presum using distributed arithmetic for providing window presum calculations in one clock cycle |
Dec. 11, 2001 |
| 6327603 |
Digital channelizer having efficient architecture for presum discrete fourier transformation selectively of real or complex data and method of operation |
Dec. 4, 2001 |
| 6266687 |
Flexibility enhancement to the modified fast convolution algorithm |
Jul. 24, 2001 |
| 6247035 |
Reduced complexity and increased flexibility modified fast convolution algorithm |
Jun. 12, 2001 |
| 6237012 |
Orthogonal transform apparatus |
May. 22, 2001 |
| 6236838 |
System for superresolution based estimation of control signals in a communications system |
May. 22, 2001 |
| 6208946 |
High speed fourier transform apparatus |
Mar. 27, 2001 |
| 6195675 |
Tone detection using discrete fourier transform techniques |
Feb. 27, 2001 |
| 6167417 |
Convolutive blind source separation using a multiple decorrelation method |
Dec. 26, 2000 |
| 6141673 |
Microprocessor modified to perform inverse discrete cosine transform operations on a one-dimensional matrix of numbers within a minimal number of instructions |
Oct. 31, 2000 |
| 6023719 |
Signal processor and method for fast Fourier transformation |
Feb. 8, 2000 |
| 6005900 |
Wideband channelization using subsampled discrete fourier transforms |
Dec. 21, 1999 |
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