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Class Information
Number: 702/77
Name: Data processing: measuring, calibrating, or testing > Measurement system in a specific environment > Electrical signal parameter measurement system > Waveform analysis > Frequency > Frequency spectrum > Using fourier method
Description: Subject matter wherein the frequency spectrum is analyzed or determined using Fourier analysis or Fourier transform technique.










Patents under this class:
1 2 3 4 5 6 7

Patent Number Title Of Patent Date Issued
7899645 Acoustic assessment of characteristics of a fluid relevant to acoustic ejection Mar. 1, 2011
7822565 System, method, and apparatus for monitoring characteristics of RF power Oct. 26, 2010
7783440 Obtaining an optical transfer function (OTF) from an edge in a sampled image data set Aug. 24, 2010
7773457 Wireless exploration seismic system Aug. 10, 2010
7765075 Method and device for spectral analysis in several frequency bands with different frequency resolution Jul. 27, 2010
7738598 Detection and time-of-arrival estimation using an IFM receiver Jun. 15, 2010
7733940 Method and apparatus for signal receipt and acquisition Jun. 8, 2010
7725277 Method and device for performing a frequency analysis of an AC voltage signal, in particular on a power grid May. 25, 2010
7720646 Signal processor and tracking method of signal search range May. 18, 2010
7715996 Method of estimating digital signal frequency May. 11, 2010
7711452 Characterizing vibrational health in computer systems with variable component configurations May. 4, 2010
7676337 Irreversible-reaction measurement method Mar. 9, 2010
7676336 Watermark embedding Mar. 9, 2010
7664339 Image processing method for object recognition and dynamic scene understanding Feb. 16, 2010
7643952 Optical image processing using minimum phase functions Jan. 5, 2010
7638999 Protective relay device, system and methods for Rogowski coil sensors Dec. 29, 2009
7640123 Method and system for detecting bluetooth signals utilizing a wideband receiver Dec. 29, 2009
7640139 Abnormality diagnosing system for mechanical equipment Dec. 29, 2009
7616721 Apparatus and method for checking network synchronization clock signal in communication system Nov. 10, 2009
7613576 Using EMI signals to facilitate proactive fault monitoring in computer systems Nov. 3, 2009
7574313 Information signal processing by modification in the spectral/modulation spectral range representation Aug. 11, 2009
7564386 Pre-processing data samples from parallelized data converters Jul. 21, 2009
7558685 Frequency resolution using compression Jul. 7, 2009
7519491 Data processing method for spectrum analyzer Apr. 14, 2009
7516026 Automated utility meter reading system with variable bandwidth receiver Apr. 7, 2009
7516031 Apparatus and method for correcting for aberrations Apr. 7, 2009
7493227 Method for determining the complex scattering function of an optical coherence tomography sample Feb. 17, 2009
7492675 Digital servo system with calibrated notch filters Feb. 17, 2009
7483799 Method and apparatus for sampling a power supply current of an integrated circuit, and storage medium onto which is recorded a control program therefor Jan. 27, 2009
7483800 Peak detection and clutter reduction for a microwave sensor Jan. 27, 2009
7467053 Three-dimensional fourier transform processing method for shared memory scalar parallel computer Dec. 16, 2008
7457712 Distributed test equipment system for testing analog communications systems Nov. 25, 2008
7444249 Digital power metering system for reducing spectral leakage when determining the frequencies present in a power signal Oct. 28, 2008
7428475 Method of processing oscillatory data Sep. 23, 2008
7424404 Method for determining the envelope curve of a modulated signal in time domain Sep. 9, 2008
7398170 System for transmitting dynamic data Jul. 8, 2008
7398165 Intelligent signal processor for vortex flowmeter Jul. 8, 2008
7373258 Method for monitoring and regulating selective hydrogenation of olefinic gasoline fractions May. 13, 2008
7369953 Femtosecond spectroscopy using minimum phase functions May. 6, 2008
7366620 Evaluation method of fine pattern feature, its equipment, and method of semiconductor device fabrication Apr. 29, 2008
7323673 Modulated laser light detector with discrete fourier transform algorithm Jan. 29, 2008
7317999 Method of mapping linearly spaced spectrum points to logarithmically spaced frequency and a measuring apparatus using the method Jan. 8, 2008
7315636 Generation of reconstructed images Jan. 1, 2008
7313493 Method of retrieving phase and magnitude of weak ultra-short optical pulses using a stronger unknown pulse Dec. 25, 2007
7298129 Time arbitrary signal power statistics measurement device and method Nov. 20, 2007
7295939 Hardware implementation of the pseudo-spectral time-domain method Nov. 13, 2007
7289922 Jitter decomposition for high speed serial interfaces Oct. 30, 2007
7283923 Method of speed measure on turbo superchargers of internal combustion engines by means of vibrations analysis and equipment to perform it Oct. 16, 2007
7266465 Wideband digital IFM receiver with frequency confirmation Sep. 4, 2007
7260485 Method and systems for distinguishing between materials having similar spectra Aug. 21, 2007

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