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Class Information
Number: 324/76.21
Name: Electricity: measuring and testing > Measuring, testing, or sensing electricity, per se > Analysis of complex waves > Frequency spectrum analyzer > By fourier analysis
Description: Subject matter wherein the energy distribution is taken at discrete harmonic components, i.e., harmonics, of the given signal.

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8674680 Method and device for fast measurement of frequency response with scalable short chirp signals Mar. 18, 2014
8582675 Pre-channelized spectrum analyzer Nov. 12, 2013
8514919 Synthetic instrument unit Aug. 20, 2013
8244196 Apparatus and method for estimating noise and interference power in a communication system Aug. 14, 2012
8169172 Synchronous disturbance suppression in a variable speed motor drive May. 1, 2012
8120355 Magnetic anomaly detector Feb. 21, 2012
8115472 System and method for space control and remote monitoring Feb. 14, 2012
8035369 Method for detecting an isolated network Oct. 11, 2011
7994410 Music recording comparison engine Aug. 9, 2011
7930119 Method for analyzing AC voltage signals Apr. 19, 2011
7845937 Method and device for influencing combustion processes Dec. 7, 2010
7795858 Methods and apparatus for computing and using a spectral map for performing nonlinear calibration of a signal path Sep. 14, 2010
7696761 Spectrum analyzing method, distortion detector and distortion compensation amplifying device Apr. 13, 2010
7613576 Using EMI signals to facilitate proactive fault monitoring in computer systems Nov. 3, 2009
7613974 Fault detection method and apparatus Nov. 3, 2009
7613580 Method and apparatus for generating an EMI fingerprint for a computer system Nov. 3, 2009
7490013 Power grid failure detection system and method Feb. 10, 2009
7466141 Phase measurement device, method, program, and recording medium Dec. 16, 2008
7415164 Modeling scenes in videos using spectral similarity Aug. 19, 2008
7365527 System and method for extending the range of a frequency measuring device Apr. 29, 2008
7323883 Phase measurement device, method, program, and recording medium Jan. 29, 2008
7298129 Time arbitrary signal power statistics measurement device and method Nov. 20, 2007
7271577 Testing loop impedance in an RCCB electrical test circuit Sep. 18, 2007
7180442 Target indentification method using cepstral coefficients Feb. 20, 2007
7126321 Apparatus and method for measuring transmission delay time of a signal propagation path between printed circuit boards Oct. 24, 2006
7123000 Adjacent channel leakage power ratio measuring apparatus, channel power measuring apparatus method, program, and recording medium with recording the program Oct. 17, 2006
7103491 Method of estimating parameters of time series data using fourier transform Sep. 5, 2006
7061221 Reduced complexity transmission line and waveguide fault tester Jun. 13, 2006
6998835 Electromagnetic sensor system and method Feb. 14, 2006
6985824 Frequency measuring device Jan. 10, 2006
6933714 Method and apparatus for measuring the impedance of an electrical energy supply system Aug. 23, 2005
6911827 System and method of measuring low impedances Jun. 28, 2005
6882947 Discrete fourier transform (DFT) leakage removal Apr. 19, 2005
6724177 Method and apparatus for accurate measurement of communications signals Apr. 20, 2004
6718270 Vibration testing device and vibration response evaluating method Apr. 6, 2004
6662125 Electromagnetic wave analyzer and program for same Dec. 9, 2003
6651016 Jitter-corrected spectrum analyzer Nov. 18, 2003
6597161 Method and apparatus for spectrum analysis with variable detection latency and multiple layer coherent integrations Jul. 22, 2003
6577968 Method of estimating signal frequency Jun. 10, 2003
6556001 Highly time resolved impedance spectroscopy Apr. 29, 2003
6545454 System and method for testing an integrated circuit device using FFT analysis based on a non-iterative FFT coherency analysis algorithm Apr. 8, 2003
6525522 System for determining the phase and magnitude of an incident signal relative to a cyclical reference signal Feb. 25, 2003
6518742 System and method for analyzing forced and unforced oscillators Feb. 11, 2003
6507181 Arrangement and method for finding out the number of sources of partial discharges Jan. 14, 2003
6469488 Method of processing a high frequency signal containing multiple fundamental frequencies Oct. 22, 2002
6466001 Method and apparatus for controlling the molten metal level in a mold in continuous casting Oct. 15, 2002
6452376 Method of estimating the carrier frequency of a phase-modulated digital signal Sep. 17, 2002
6434496 Method and apparatus for measuring light absorption spectra Aug. 13, 2002
6424137 Use of acoustic spectral analysis for monitoring/control of CMP processes Jul. 23, 2002
6408696 Coherent phase line enhancer spectral analysis technique Jun. 25, 2002

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