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8380453 Method and device for determining the frequency distribution of the signal levels of a measured signal measured in overlapping observation intervals  
A method for determining the frequency distribution of the signal level of a measured signal measured respectively in overlapping observation intervals via a time or frequency raster. The method...
8378693 Vector network analyzer (VNA) on a chip  
A front end of a vector network analyzer (VNA) on an integrated circuit includes a clock generator and two ports. The VNA couples to a device under test (DUT) using the two ports. Each port may...
8374812 Signal analyzer and method for producing data therefore  
A first frequency analysis range and a second frequency analysis range narrower than the first one are set with an operation panel 34, etc. A first signal path 171 produces first time domain data...
8355884 Signal quality measurement device, spectrum measurement circuit, and program  
Spectrum measurement circuit (101) includes: N-(where N is integer equal or greater than 2) phase clock generation circuit (304) for supplying phase-modulated signals in which the phase of a clock...
8326557 Detection of an abnormal signal in a compound sampled  
A technique detects an abnormal signal in a compound sampled signal recorded in the time domain. The technique involves dividing the sampled signal recorded in the time domain into sample...
8314604 Apparatus and method for spurious-free signal range measurement for RF circuitry  
The present invention is directed to an apparatus and methodology for performing spurious-free dynamic range (SFDR) measurements on an RF circuit, such as a mixer, using a single analog input...
8306770 Method, system and test platform for testing output of electrical device  
A method for testing output of an electrical device includes the following steps: a device being tested transmits a first signal to a test platform through a channel being tested. A signal...
8306765 Method and device for acoustic length testing of compressor  
Computer system and method for determining frequencies of various components of a volume choke volume dampener to be attached to a compressor. The method includes determining a sound spectrum of a...
8296106 Apparatus, method and computer-readable storage medium for processing a signal in a spectrometer system  
A method is provided that includes receiving and processing a sample signal scan. Processing the sample signal scan includes applying an inner-product operation on the sample signal scan and each...
8296087 Interrogation method for passive wireless sensor interrogation system  
A method of wirelessly interrogating a sensing device comprising a plurality of passive sensors, to determine a measurement parameter, comprises the steps of repeatedly interrogating the sensing...
8289195 Fractional rate resampling filter on FPGA  
A programmable logic device can be configured as a fractional rate resampling filter capable of performing downsampling prior to upsampling without modifying the overall filter response. Input...
8271209 Spectral searching method for substance identification  
Methods, systems and computer program products for identifying components of an unknown mixture using spectral analysis techniques. The method includes comparing the spectrum of the unknown...
8255179 Time qualified frequency mask trigger  
A time qualified frequency mask trigger triggers on signals that violate a frequency mask for at least a specified time duration. A frame of digital data representing an input signal is...
8250008 Decision tree refinement  
A model refinement system refines initial split rules that define an initial decision tree to generate final split-rules. The model refinement refines the initial split rules by removing clauses...
8244490 Power trigger with time qualified and sequential event capability  
A power trigger is provided having time qualified and sequential event capability. Digital data representing an input signal is converted into a power signal. The power signal is compared to a...
8233569 Realtime spectrum trigger system on realtime oscilloscope  
A realtime spectrum trigger system on a realtime oscilloscope considers both the magnitude and phase of an input signal having a periodic component so that successive acquisitions of the input...
8229754 Selecting features of displayed audio data across time  
Systems, methods, and computer program products for graphically displaying audio data are provided. In some implementations, a method is provided. The method includes displaying a graphical visual...
8224603 Frequency offset estimating apparatus and estimating method thereof  
A frequency offset estimating apparatus includes an nth power computing module and a spectrum analyzing module. By raising a received signal to nth power to generate an nth power signal and...
8219332 Electromagnetic field distribution measuring method, apparatus for the method, computer program and information recording medium  
Electromagnetic field distribution is measured by considering time variations of a measured electric and/or magnetic field value. In response to scanning performed with a probe at an arbitrary set...
8214160 State detection device, state detection method, state detection program, and information recording medium  
A state detecting apparatus S for detecting a current operating state of an LM (linear motion) system includes an AE sensor 1 generating a detection signal Sae by detecting an AE wave elastically...
8200454 Method, data processing program and computer program product for time series analysis  
Method, apparatus, and system, including computer program products, implementing and using techniques for time series analysis, wherein the time series exhibit trend and/or seasonality. Model...
8195416 Fundamental wave beat component detecting method and measuring target signal sampling apparatus and waveform observation system using the same  
Frequencies of plural peak signals which appear in a band ½ of a sampling frequency are detected from a spectrum obtained from a measuring target signal sampled with the sampling frequency in...
8195395 System for monitoring, determining, and reporting directional spectra of ocean surface waves in near real-time from a moored buoy  
A moored buoy floating at the ocean surface and anchored to the seafloor precisely measures acceleration, pitch, roll, and Earth's magnetic flux field of the buoy over a limited sampling period....
8180586 Amplitude discrimination using the frequency mask trigger  
A frequency mask trigger having frequency selective amplitude discrimination capability is provided for triggering when selected frequency components of an input signal fail to reach a desired...
8169612 System and method for performing ellipsometric measurements on an arbitrarily large or continuously moving sample  
A method for calibrating an apparatus for ellipsometric measurements performed on an arbitrarily large or continuously moving sample, using a visible sample reference frame, and one or more laser...
8160839 System and method for device recognition based on signal patterns  
A computationally implemented method for recognizing devices based on detected signal patterns includes generating a plurality of signal pattern templates for a plurality of radio frequency...
8159208 Hand-held microwave spectrum analyzer with operation range from 9 KHz to over 20 GHz  
A spectrum analyzer is provided that includes components to achieve from below 9 kHz to above 20 GHz operation range while remaining hand-held. Components of the spectrum analyzer include an...
8126664 Detection, localization and interpretation of partial discharge  
In order to detect, localize and interpret a partial discharge occurring in a partial discharge site along an electrical equipment, two measurement probes and a synchronization probe are installed...
8112247 Resource adaptive spectrum estimation of streaming data  
Introduced herein is a “resource adaptive” algorithm for spectrum and periodicity estimation on a continuous stream of data. The formulation is based on the derivation of a closed-form incremental...
8112238 Method of alignment for radio frequency measurement instrument and measurement instrument including same  
A method is provided for aligning a measurement instrument that includes a tunable filter. The method includes: (i) applying an output signal of an internal noise source of the measurement...
8108166 Analysis of chirp frequency response using arbitrary resampling filters  
Log chirp testing where a log chirp may be provided to a device under test and a first time domain response from the device under test may be received. The first time domain response may be in the...
8103470 Method, coupler and apparatus for measuring radiated power  
In a method for measuring a radiation power, an elliptical mirror is prepared so as to have a elliptical spherical space enclosed by a metal wall surface, the space having a rotating axis passing...
8082117 Optical image processing using minimum phase functions  
A method utilizes an optical image processing system. The method includes providing a measured magnitude of the Fourier transform of a complex transmission function of an object or optical image....
8073656 High bandwidth oscilloscope for digitizing an analog signal having a bandwidth greater than the bandwidth of digitizing components of the oscilloscope  
A method for improving bandwidth of an oscilloscope involves, in preferred embodiments, the use of frequency up-conversion and down-conversion techniques. In an illustrative embodiment the...
8060325 Variable sensing using frequency domain  
Embodiments of a method and apparatus for variable sensing using the frequency domain are taught herein. An exposure of a system to a physical variable is determined by periodically sensing the...
8055465 Method, data processing program and computer program product for determining a periodic cycle of time series data  
Method, apparatus, and system, including computer program products, implementing and using techniques for determining a periodic cycle of time series data. A frequency spectrum of the data is...
8017908 Apparatus and method for identifying peaks in liquid chromatography/mass spectrometry data and for forming spectra and chromatograms  
Chromatograms and mass spectra produced by an LC/MS system are analyzed by creating a two-dimensional data matrix of the spectral and chromatographic data. The two-dimensional matrix can be...
8005633 Excitation signal generator for improved accuracy of model-based testing  
An excitation signal generator (“ESG”) is described. The ESG generates an minimized excitation signal for use in a test system to generate a functional model of a device under test (“DUT”) where...
7996169 Method and apparatus for compensating S-parameters of passive circuits  
The invention related to a method and circuit that is used to compensate for S-parameters of a passive circuit which do not satisfy passivity. The method includes the following steps: (1) getting...
7987060 Identifying peaks in mass spectrometry data  
A method of processing Fourier Transform Mass Spectrometry (FTMS) data includes performing a Fourier Transform of a part of a time domain transient and identifying from that transformed data...
7979211 Electromagnetic data processing system  
Method and computer program for accepting controlled-source electromagnetic (“CSEM”) source and receiver data (40) as time series, transforming these data into the time-frequency domain, and...
7966140 Radio frequency power meter  
An in-line directional radio-frequency (“RF”) power meter for measuring power and other parameters in a transmission line. The meter simultaneously measures complex voltage-waves traveling in the...
7962301 Method of processing and storing mass spectrometry data  
A data compression technique is disclosed for Fourier Transform Mass Spectrometry (FTMS). A statistical analysis is applied to the data in the frequency domain since most of this data is a result...
7957938 Method and apparatus for a high bandwidth oscilloscope utilizing multiple channel digital bandwidth interleaving  
A method of digitizing an analog signal is provided, comprising the steps of separating the analog signal spanning a frequency range into a plurality of frequency bands, and then translating at...
7953566 Electromagnetic interference reduction calculation method, device, and program, and its electronic circuit  
A calculation method of electromagnetic interference reduction through spectrum diffusion that is for reducing the electromagnetic interference, in which, when a center frequency of a measurement...
7948236 Adaptive multichannel locator system for multiple proximity detection  
A man-portable locator system for locating buried or otherwise inaccessible pipes, conduits, cables, wires and inserted transmitters using detector arrays and stochastic signal processing and...
7949484 Probability density function separating apparatus, probability density function separating method, noise separating apparatus, noise separating method, testing apparatus, testing method, calculating apparatus, calculating method, program, and recording medium  
There is provided a probability density function separating apparatus that separates a predetermined component in a given probability density function, including: a domain transforming section...
7945407 Signal analyzers and frequency domain data production methods  
Sets of time domain data of respective frequency bands from Fd-1 to Fd-n of a periodic input signal Fs are acquired. Sets of the time domain data of the common frequency band are extracted from...
7936162 Measured-signal repetition frequency detection method, and sampling apparatus and waveform observation system using the method  
In a method of detecting a repetition frequency of a measured signal, in order to detect the waveform repetition frequency of the measured signal with high accuracy even in the presence of a...
7933430 Method and apparatus for spectral mixture resolution  
The spectral method for determining the concentrations of a substance in a mixture of any number of substances is defined by a chemical image having a plurality of pixels (520). The method...