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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
8706435 Signal detection and triggering using a difference bitmap Apr. 22, 2014
8676543 Determining the resonance parameters for mechanical oscillators Mar. 18, 2014
8674680 Method and device for fast measurement of frequency response with scalable short chirp signals Mar. 18, 2014
8639462 Method and system for determining the time-of-flight of a signal Jan. 28, 2014
8612182 Methods and systems for isolating a frequency in a rotating machine Dec. 17, 2013
8607093 Systems and methods for detecting machine faults in network using acoustic monitoring Dec. 10, 2013
8594961 Remote interrogation of a passive wireless antenna sensor Nov. 26, 2013
8582675 Pre-channelized spectrum analyzer Nov. 12, 2013
8532207 Methods and systems for distinguishing a signal of interest from interference signals Sep. 10, 2013
8527227 Method and device for measuring electromagnetic wave Sep. 3, 2013
8515676 Method and apparatus for assessing the integrity of a rock mass Aug. 20, 2013
8504209 Controlling a device that generates vibrations in a computer system Aug. 6, 2013
8457914 Apparatus and method for obtaining phase corresponding to object position Jun. 4, 2013
8457913 Computer system with integrated electromagnetic-interference detectors Jun. 4, 2013
8452571 Trigger figure-of-merit indicator May. 28, 2013
8421440 Apparatus for spectrum sensing and associated methods Apr. 16, 2013
8407023 Robotically controlled catheter and method of its calibration Mar. 26, 2013
8407268 Method for determining an optimum sampling frequency, and a power analyzer performing the method Mar. 26, 2013
8401808 Wavelength-multiplexed optical signal measurement device and the method thereof Mar. 19, 2013
8392133 Method for measuring shear wavespeed in an isotropic plate Mar. 5, 2013
8355881 Device and process for machine diagnostics by means of vibration measurement Jan. 15, 2013
8301406 Methods for prognosing mechanical systems Oct. 30, 2012
8296087 Interrogation method for passive wireless sensor interrogation system Oct. 23, 2012
8249820 Detector assembly for use in environments containing background magnetic noise and method thereof Aug. 21, 2012
8224603 Frequency offset estimating apparatus and estimating method thereof Jul. 17, 2012
8219350 Apparatus for measuring a frequency-domain optical coherence tomography power spectrum from a sample Jul. 10, 2012
8211022 Systems and methods for assessing dynamic cerebral autoregulation Jul. 3, 2012
8195395 System for monitoring, determining, and reporting directional spectra of ocean surface waves in near real-time from a moored buoy Jun. 5, 2012
8190388 Method and system for detecting Bluetooth signals utilizing a wideband receiver May. 29, 2012
8169172 Synchronous disturbance suppression in a variable speed motor drive May. 1, 2012
8155910 Robotically controlled catheter and method of its calibration Apr. 10, 2012
8150644 Femtosecond spectroscopy using minimum or maximum phase functions Apr. 3, 2012
8145443 Fourier transform-based phasor estimation method and apparatus capable of eliminating influence of exponentially decaying DC offsets Mar. 27, 2012
8131491 Method and apparatus for evaluating data representing a plurality of excitations of a plurality of sensors Mar. 6, 2012
8127138 Method for embedding information in sonar Feb. 28, 2012
8121804 Electrical network analysis of a multiphase system Feb. 21, 2012
8113048 Dynamic imbalance detection apparatus and method using linear time-varying angular velocity model Feb. 14, 2012
8109139 Method and system for monitoring tire pressure Feb. 7, 2012
8108167 Method for ascertaining the harmonic components of an analog electrical signal at a fundamental frequency which changes over time Jan. 31, 2012
8095326 Method and device to predict a state of a power system in the time domain Jan. 10, 2012
8082117 Optical image processing using minimum phase functions Dec. 20, 2011
8050880 Generation of a constant envelope signal Nov. 1, 2011
8044670 Apparatus and method for determining a resonant frequency of a wind turbine tower Oct. 25, 2011
8032322 Apparatus for measuring a frequency-domain optical coherence tomography power spectrum from a sample Oct. 4, 2011
8023575 Approach for spectrum analysis in a receiver Sep. 20, 2011
8014965 Spectral estimation of spectrometers time-sampled signals using fast implementation of the reverse non-uniform discrete fourier transform Sep. 6, 2011
7987060 Identifying peaks in mass spectrometry data Jul. 26, 2011
7949495 Process variable transmitter with diagnostics May. 24, 2011
7930119 Method for analyzing AC voltage signals Apr. 19, 2011
7899963 Method and apparatus for allocating inputs in microcontrollers, and corresponding microcontroller Mar. 1, 2011

1 2 3 4 5 6 7

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