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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:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7620675 |
Image and audio transform methods |
Nov. 17, 2009 |
| 7609183 |
Analog to digital converter and recording medium |
Oct. 27, 2009 |
| 7590293 |
Non-iterative method to restore image from transformed component data |
Sep. 15, 2009 |
| 7555511 |
Methods for addressing input data values of a Fast Fourier Transform (FFT) calculation |
Jun. 30, 2009 |
| 7543009 |
Fractional fourier transform convolver arrangement |
Jun. 2, 2009 |
| 7529789 |
Method for representing complex numbers in a communication system |
May. 5, 2009 |
| 7483932 |
Method and system for computing multidimensional fast Fourier transforms |
Jan. 27, 2009 |
| 7472152 |
Accommodating fourier transformation attenuation between transform term frequencies |
Dec. 30, 2008 |
| 7454452 |
Fast fourier transform operation with reduced cache penalty |
Nov. 18, 2008 |
| 7440989 |
Kernel function approximation and receiver |
Oct. 21, 2008 |
| 7430575 |
One-dimensional fourier transform program, method and apparatus |
Sep. 30, 2008 |
| 7411187 |
Ion trap in a semiconductor chip |
Aug. 12, 2008 |
| 7395292 |
Method for displaying spectral trends in complex signals |
Jul. 1, 2008 |
| 7376173 |
Unambiguously encoding and decoding signals for wireless channels |
May. 20, 2008 |
| 7315636 |
Generation of reconstructed images |
Jan. 1, 2008 |
| 7313250 |
Method and system for frequency domain watermarking using a phase based filter signature |
Dec. 25, 2007 |
| 7302100 |
Method for increasing detectable light energy without changing shape content in radial and angular or rotational analysis of images for shape content and matching |
Nov. 27, 2007 |
| 7292166 |
Analog/digital converter and program therefor |
Nov. 6, 2007 |
| 7289552 |
Efficient joint detection |
Oct. 30, 2007 |
| 7248980 |
Method and apparatus for removing quantization effects in a quantized signal |
Jul. 24, 2007 |
| 7227902 |
Method and apparatus for digital channelisation and de-channelisation |
Jun. 5, 2007 |
| 7200630 |
Inverse fourier transform method, phase characterization method of optical components from transmission and group delay measurements as well as a system for performing the method |
Apr. 3, 2007 |
| 7197095 |
Inverse fast fourier transform (IFFT) with overlap and add |
Mar. 27, 2007 |
| 7146394 |
Watermark detection |
Dec. 5, 2006 |
| 7120659 |
Apparatus, methods, and computer program products for determining the coefficients of a function with decreased latency |
Oct. 10, 2006 |
| 7113967 |
Efficient quantum computing operations |
Sep. 26, 2006 |
| 7110567 |
Optimized detection of a watermark in an information signal |
Sep. 19, 2006 |
| 7103223 |
Apparatus and method for radial and angular or rotational analysis or images for shape content and matching |
Sep. 5, 2006 |
| 7092429 |
Multi-pass frequency hop-acquisition correlator |
Aug. 15, 2006 |
| 7079704 |
Objective method and system for estimating perceived image and video sharpness |
Jul. 18, 2006 |
| 7072290 |
Single user detection base station |
Jul. 4, 2006 |
| 7062523 |
Method for efficiently computing a fast fourier transform |
Jun. 13, 2006 |
| 7028063 |
Method and apparatus for a DFT/IDFT engine supporting multiple X-DSL protocols |
Apr. 11, 2006 |
| 6963892 |
Real-time method and apparatus for performing a large size fast fourier transform |
Nov. 8, 2005 |
| 6950843 |
Multi-dimensional Fourier transform parallel processing method for shared memory type scalar parallel computer |
Sep. 27, 2005 |
| 6922712 |
Apparatus, methods, and computer program products for accurately determining the coefficients of a function |
Jul. 26, 2005 |
| 6865589 |
Watermark detection |
Mar. 8, 2005 |
| 6839727 |
System and method for computing a discrete transform |
Jan. 4, 2005 |
| 6792441 |
Parallel multiprocessing for the fast fourier transform with pipeline architecture |
Sep. 14, 2004 |
| 6772183 |
Device for converting input data to output data using plural converters |
Aug. 3, 2004 |
| 6760741 |
FFT pointer mechanism for FFT memory management |
Jul. 6, 2004 |
| 6751641 |
Time domain data converter with output frequency domain conversion |
Jun. 15, 2004 |
| 6741551 |
Hybrid TDMA/CDMA system based on filtered multitone modulation |
May. 25, 2004 |
| 6735610 |
Apparatus, methods, and computer program products for determining the coefficients of a function with decreased latency |
May. 11, 2004 |
| 6735346 |
HD fourier transforms for irregularly sampled data |
May. 11, 2004 |
| 6735221 |
Communication network system |
May. 11, 2004 |
| 6687422 |
Discrete image data interpolation using sub-unity shift |
Feb. 3, 2004 |
| 6509866 |
Fast chirp transform |
Jan. 21, 2003 |
| 6505223 |
Watermark detection |
Jan. 7, 2003 |
| 6490672 |
Method for computing a fast fourier transform and associated circuit for addressing a data memory |
Dec. 3, 2002 |
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