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Class Information
Number: 708/403
Name: Electrical computers: arithmetic processing and calculating > Electrical digital calculating computer > Particular function performed > Transform > Fourier
Description: Subject matter wherein the transformation performed is a mathematical operation which decomposes a time varying signal into its complex frequency components (amplitude and the phase or real and imaginary components).

Sub-classes under this class:

Class Number Class Name Patents
708/409 Butterfly circuit 69
708/405 Discrete fourier transform (i.e., dft) 158
708/404 Fast fourier transform (i.e., fft) 334
708/406 Pipeline 49
708/408 Radix greater than two 38
708/407 Systolic 13

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8694570 Method and apparatus for evaluation of multi-dimensional discrete fourier transforms Apr. 8, 2014
8649255 Device and method for fast fourier transform Feb. 11, 2014
8639736 Method and apparatus for detecting signal using cyclo-stationary characterisitics Jan. 28, 2014
8634486 Signal receiving apparatus, signal receiving method and signal receiving program Jan. 21, 2014
8612499 Method for evaluating quantum operator averages Dec. 17, 2013
8606839 Interleaved method for parallel implementation of the fast fourier transform Dec. 10, 2013
8601044 Discrete Fourier Transform in an integrated circuit device Dec. 3, 2013
8601046 Method and apparatus for calculating an N-point discrete fourier transform Dec. 3, 2013
8595278 Method and system for unconstrained frequency domain adaptive filtering Nov. 26, 2013
8577946 Signal receiving apparatus and communication system Nov. 5, 2013
8572148 Data reorganizer for fourier transformation of parallel data streams Oct. 29, 2013
8572149 Apparatus and methods for dynamic data-based scaling of data such as staged fast fourier transform (FFT) while enhancing performance Oct. 29, 2013
8566382 Method and apparatus for improved calculation of multiple dimension fast fourier transforms Oct. 22, 2013
8549060 Concept for realistic simulation of a frequency spectrum Oct. 1, 2013
8504601 FIR filter with reduced element count Aug. 6, 2013
8484277 Transforming signals using passive circuits Jul. 9, 2013
8484276 Processing array data on SIMD multi-core processor architectures Jul. 9, 2013
8484275 Reordering discrete fourier transform outputs Jul. 9, 2013
8473536 Algorithm for adiabatic pulse design using the Shinnar Le-Roux transform Jun. 25, 2013
RE44105 Apparatus and method for FT pre-coding of data to reduce PAPR in a multi-carrier wireless network Mar. 26, 2013
8386552 Fourier transform processing and twiddle factor generation Feb. 26, 2013
8380331 Method and apparatus for relative pitch tracking of multiple arbitrary sounds Feb. 19, 2013
8375075 High-speed discrete fourier transform apparatus and method thereof Feb. 12, 2013
8365104 Original data producing method and original data producing program Jan. 29, 2013
8363540 Pilot signal in an FDMA communication system Jan. 29, 2013
8351525 Orthogonal frequency division multiplexing transmitting and receiving device Jan. 8, 2013
8346836 Apparatus and method for area and speed efficient fast fourier transform (FFT) processoring with runtime and static programmability of number of points Jan. 1, 2013
8341202 Code division multiple access (CDMA) system for calculating coefficients of filter and method for filtering a received signal Dec. 25, 2012
8279978 Pilot signal in an FDMA communication system Oct. 2, 2012
8274726 Method for utilizing properties of the sinc(x) function for phase retrieval on nyquist-under-sampled data Sep. 25, 2012
8161093 Complex multiplier and twiddle factor generator Apr. 17, 2012
8145695 Signal processing method and data processing method and apparatus Mar. 27, 2012
8116553 Rotation invariant 2D sketch descriptor Feb. 14, 2012
8005315 Spectrum spreading signal demodulation method and apparatus Aug. 23, 2011
8000228 Pilot signal in an FDMA communication system Aug. 16, 2011
7995860 Spectrum spreading signal demodulation method and apparatus Aug. 9, 2011
RE42070 Apparatus and method for radial and angular or rotational analysis of images for shape content and matching Jan. 25, 2011
7852955 Orthogonal frequency division multiplexing transmitting and receiving method and device thereof Dec. 14, 2010
7817733 Method and system for peak power reduction Oct. 19, 2010
7808886 Pilot signal in an FDMA communication system Oct. 5, 2010
7793013 High-speed FIR filters in FPGAs Sep. 7, 2010
7787546 Apparatus and method for FT pre-coding of data to reduce PAPR in a multi-carrier wireless network Aug. 31, 2010
7787982 Working system, method for detecting contact, and acoustic emission contact detection device Aug. 31, 2010
7761495 Fourier transform processor Jul. 20, 2010
7752249 Memory-based fast fourier transform device Jul. 6, 2010
7733940 Method and apparatus for signal receipt and acquisition Jun. 8, 2010
7693034 Combined inverse fast fourier transform and guard interval processing for efficient implementation of OFDM based systems Apr. 6, 2010
7676360 Method for scale-factor estimation in an audio encoder Mar. 9, 2010
7634524 Arithmetic method and function arithmetic circuit for a fast fourier transform Dec. 15, 2009
7620675 Image and audio transform methods Nov. 17, 2009

1 2 3 4

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