Signal-in-signal Determination Patents (Class 702/74)
  • Patent number: 9922003
    Abstract: A method for locating a pulse in detector output data, comprising fitting one or more functions to the detector output data; and determining a location and an amplitude of a peak of said pulse from said one or more functions. The one or more functions may be are a function of time.
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: March 20, 2018
    Assignee: Southern Innovation International Pty Ltd
    Inventors: Jonathan Huntley Manton, Christopher Charles McLean, Paul Andrew Basil Scoullar
  • Patent number: 9259188
    Abstract: According to embodiments, systems and methods are provided for filtering a signal. A first reference signal may be generated according to a signal model and a second reference signal may be generated by analyzing a continuous wavelet transform of a signal. The first and second reference signals may then both be applied to an input signal to filter the input signal according to the components of both of the reference signals.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: February 16, 2016
    Assignee: Nellcor Puritan Bennett Ireland
    Inventors: James Nicholas Watson, Paul Stanley Addison
  • Patent number: 9209924
    Abstract: An apparatus for detecting a periodic timing reference in a received signal comprises a correlator and an integrator. The correlator is configured to correlate the received signal with a template to produce a correlated signal indicating the presence of the periodic timing reference in the received signal. The integrator is configured to produce an accumulated signal by overlaying one or more delayed versions of the accumulated signal onto the correlated signal, and is further configured to delay the accumulated signals by integer multiples L of a period of the periodic timing reference, the integer multiples L being at least two.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: December 8, 2015
    Assignee: BlackBerry Limited
    Inventor: Peter Anthony Borowski
  • Patent number: 9136891
    Abstract: This application presents a direct data recovery from subspaces or parameters subranges of a received OFDM signal preidentified as corresponding to specific data symbols, by applying adaptive data decoding (ADD) method for reversing both original data coding and deterministic and random distortions introduced by a transmission channel, wherein both reversals are achieved by the same conversion of the subspaces or parameter subranges into data transmitted originally in order to eliminate an intermediate recovery of signals or parameters transmitted originally within the received OFDM signal. The ADD includes using both amplitudes and gradients of amplitudes of OFDM tone signals.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: September 15, 2015
    Inventor: John W Bogdan
  • Patent number: 9100165
    Abstract: The direct data recovery (DDR) uses adaptive data decoding (ADD) to combine a conventional reversal of data coding made on a transmit side with a reversal of received signal distortions introduced by a transmission channel; wherein both such reversals are achieved by the same conversion of a sub-range parameter or a referencing subspace (corresponding to said received signal) into data transmitted originally, by applying an ADD step comparing said sub-range parameter or referencing subspace with its reference or reference frame and using a result of such comparison for addressing a Content Addressed Memory (CAM) outputting recovered data.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: August 4, 2015
    Inventor: John W Bogdan
  • Patent number: 9077315
    Abstract: This application presents a direct data recovery from subspaces or parameters subranges of a received OFDM signal pre-identified as corresponding to specific data symbols, by applying inverse signal transformation (IST) reversing deterministic and random distortions introduced by a transmission channel. The direct data recovery can eliminate an intermediate recovery of signal transmitted originally from the received OFDM signal and reduce processing errors, power consumption and computing resources required by such intermediate recovery in conventional receivers.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: July 7, 2015
    Inventor: John W. Bogdan
  • Patent number: 8934524
    Abstract: A method detects a threshold crossing instant at which a signal crosses a threshold, by: sampling the signal at plural sampling instants spaced from one another by a sampling period; detecting consecutive first and second sampling instants at which the signal has a first signal value lower than or equal to the threshold, and the signal has a second signal value higher than the threshold, respectively; calculating a first interval indicative of a time between the threshold crossing instant and the first sampling instant; setting a reference signal having a reference amplitude representing the first interval relative to a reference scale; generating a signal with a delay depending on said reference signal; generating a threshold crossing detection signal at an instant delayed by a second interval; calibrating the reference scale of the reference amplitude so that the second interval is substantially equal to the first interval.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: January 13, 2015
    Inventor: Maurizio Casti
  • Patent number: 8791689
    Abstract: Disclosed is a probe for an oscilloscope comprising a multi-stage transistor amplifier that acts as an impedance transformer. Said amplifier is a d.c.-coupled emitter follower circuit that is composed of bipolar transistors or a d.c.-coupled source follower circuit which is composed of field effect transistors and the successive amplifier elements of which are dimensioned and tuned to each other in such a way that the resulting offset direct voltage between the input and the output is minimal.
    Type: Grant
    Filed: July 16, 2007
    Date of Patent: July 29, 2014
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Martin Peschke, Alexander Schild
  • Patent number: 8364428
    Abstract: A junction-photovoltage method and apparatus for contactless determination of an electrical/physical parameter of a semiconductor structure having at least one p-n junction located at a surface is disclosed. In one aspect, the method includes illuminating the surface with the p-n junction with a light beam of a first wavelength to create excess carriers at the surface. The method also includes modulating the light intensity of the light beam at a single predefined frequency. The method also includes determining a first photo-voltage at a first position inside the illuminated area and a second photo-voltage at at least a second position outside the illuminated area. The method also includes calculating an electrical/physical parameter of the semiconductor structure based on the first and second photo-voltage.
    Type: Grant
    Filed: November 17, 2009
    Date of Patent: January 29, 2013
    Assignee: IMEC
    Inventors: Frederic Schaus, Trudo Clarysse
  • Patent number: 8326557
    Abstract: 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 segments; transforming each of the sample segments from the time domain into the frequency domain to determine transformed segments, each transformed segment having frequency points, each frequency point having an amplitude associated with a certain frequency; for a frequency point in a given transformed segment, determining a ratio by dividing the amplitude of the frequency point by a value indicative of an average of the amplitudes of the frequency points at the same frequency across transformed segments; repeating the determination of a ratio for frequency points in each transformed segment to determine ratios for each transformed segment; repeating the determination of ratios for transformed segments; and using the ratios to detect the abnormal signal in the compound sampled signal.
    Type: Grant
    Filed: November 10, 2009
    Date of Patent: December 4, 2012
    Assignee: SPX Corporation
    Inventors: Moray Kidd, Zhanqun Shi
  • Patent number: 8185334
    Abstract: Aspects of the present invention are related to systems and methods for removing spikes and/or speckle noise from a digital signal. In some embodiments of the present invention, an input signal is filtered according to a first low pass filter. The low pass filtered signal, also considered a first local-mean signal, is subtracted from the input signal, thereby producing an AC signal. A maximum of a first region associated with the AC signal and a maximum of a second region associated with the AC signal are determined. When the maximum of the first region and the maximum of the second region meet a comparison criterion, coefficients for a second low pass filter are determined. The input signal is filtered according to the second low pass filter, thereby producing a second local-mean signal, and a second AC signal is produced by subtracting, from the input signal, the second local-mean signal.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: May 22, 2012
    Assignee: Tektronix, Inc.
    Inventor: Kevin M. Ferguson
  • Patent number: 8126256
    Abstract: An analysis device for analyzing a signal characteristic with the use of a mask. The analysis device includes a buffer device for the provision of a signal-image address of a signal-image point of a signal image and for the provision of a mask-image address of a mask-image point of a mask image and a comparison device for the comparison of the signal-image address and the mask-image address.
    Type: Grant
    Filed: July 24, 2007
    Date of Patent: February 28, 2012
    Assignee: Rohde & Schwarz Gmbh & Co. KG
    Inventor: Thomas Kuhwald
  • Patent number: 8095328
    Abstract: This present specification provides, amongst other things, an electro-optical monitoring system for obtaining a once-per-revolution signal based on the surface reflection of a rotating device that mandates non-contacting sensor input in potentially hostile environments. The system can use optical and electronic sections to illuminate and detect surface reflections from the rotating surface using existing mounting locations on the periphery of the machine to be measured. The electronic portion is configured to determine a unique mark as the once-per-revolution marker or allow an attending operator to assign a specific marker based on the observed reflected pattern. The optical portion consists of a light source, receiver, and optics that allow for focused and directed light paths.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: January 10, 2012
    Assignee: Cognitive Vision Inc.
    Inventors: John Gordon Thomas, Peter James Neild, Raymond Joseph Schumacher
  • Patent number: 8093870
    Abstract: A generator apparatus includes a generator, a generator controller, and a rectifier bridge. A detector unit for recognizing a load shutoff is also provided. When a load shutoff is recognized, a switch is controlled to be transmissive so that energy produced by the load shutoff is stored in an energy reservoir. From there it can be fed back into the vehicle electrical system.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: January 10, 2012
    Assignee: Robert Bosch GmbH
    Inventor: Markus Mueller
  • Patent number: 8032319
    Abstract: Methods for signal processing employ instantaneous frequency analysis through quadrature genometric measurement of streaming signal data. Such methods may include the analysis of any composite analog periodic signal, including but not limited to audio, video, radio, seismic, light, radar, sonar, EKG, where signal data is streaming, stationary or non-stationary, and represents either linear or non-linear processes.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: October 4, 2011
    Assignee: Hal Enterprises, LLC
    Inventors: Carl Hal Hansen, Stephen R. Lindsey, Christopher E. Spencer, James Bryant Hansen, Richard C. Lindsey, Karl G. Merkley
  • Patent number: 8023575
    Abstract: A wireless communications apparatus that it is useable as a spectrum analyzer and as a wireless receiver. The wireless communications apparatus has a radio circuit that is configured to receive EM radiation. Signal processing logic receives signals from the radio circuit based on the EM radiation. The signal processing logic has a receiver operational mode that processes the signals in accordance with a communication protocol and outputs data encoded in the signals to a host processor. The signal processing logic has a spectrum analyzer operational mode that generates frequency domain data and passes the frequency domain data to the host processor. The frequency domain data describe strength versus frequency of the EM radiation. The host processes the data in accordance with the configuration currently in use. Therefore, the wireless communications apparatus operates as a receiver in one operational mode and as a real-time spectrum analyzer in another operational mode.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: September 20, 2011
    Assignee: Bandspeed, Inc.
    Inventors: Ben Jones, Ming Ding, John “Jack” Morton
  • Patent number: 8000914
    Abstract: Systems and methods for electromechanical oscillation monitoring are disclosed herein. In one embodiment, a method for monitoring electromechanical oscillation in a power system includes forming a power density spectrum in frequency domain based on phasor measurements collected from a plurality of locations in the power system and identifying an oscillation in the power density spectrum. The oscillation has a power density larger than other oscillations. The method also includes analyzing the identified oscillation in time domain to determine a damping characteristic of the identified oscillation and indicating that an insufficiently damped oscillation exists in the power system if the determined damping characteristic of the oscillation meets a predetermined condition.
    Type: Grant
    Filed: March 3, 2009
    Date of Patent: August 16, 2011
    Assignee: Washington State University
    Inventors: Vaithianathan Venkatasubramanian, Guoping Liu
  • Patent number: 7970564
    Abstract: This disclosure describes signal processing techniques that can improve the performance of blind source separation (BSS) techniques. In particular, the described techniques propose pre-processing steps that can help to de-correlate the different signals from one another prior to execution of the BSS techniques. In addition, the described techniques also propose optional post-processing steps that can further de-correlate the different signals following execution of the BSS techniques. The techniques may be particularly useful for improving BSS performance with highly correlated audio signals, e.g., from two microphones that are in close spatial proximity to one another.
    Type: Grant
    Filed: October 20, 2006
    Date of Patent: June 28, 2011
    Assignee: QUALCOMM Incorporated
    Inventors: Song Wang, Eddie L. T. Choy, Samir Kumar Gupta
  • Patent number: 7966156
    Abstract: A method and system for intrinsic timescale decomposition, filtering, and automated analysis of signals of arbitrary origin or timescale including receiving an input signal, determining a baseline segment and a monotonic residual segment with strictly negative minimum and strictly positive maximum between two successive extrema of the input signal, and producing a baseline output signal and a residual output signal. The method and system also includes determining at least one instantaneous frequency estimate from a proper rotation signal, determining a zero-crossing and a local extremum of the proper rotation signal, and applying interpolation thereto to determine an instantaneous frequency estimate thereof.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: June 21, 2011
    Assignee: Flint Hills Scientific LLC
    Inventors: Mark G. Frei, Ivan Osorio
  • Patent number: 7962610
    Abstract: An embodiment of the invention provides a technique that allows the collection, storage, and manipulation of data collected in a computer network.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: June 14, 2011
    Assignee: International Business Machines Corporation
    Inventors: Lisa Ellen Lippincott, John Edward Firebaugh, Dennis Sidney Goodrow
  • Patent number: 7856329
    Abstract: A method of processing data acquired by under-sampling a chirped, sinusoidal waveform comprises complex-heterodyning the under-sampled data with a chirped signal having characteristics similar to the sinusoidal waveform to generate a demodulated signal and analyzing the demodulated signal to determine characteristics of the sinusoidal waveform.
    Type: Grant
    Filed: April 10, 2007
    Date of Patent: December 21, 2010
    Inventors: Tim Niebauer, Aaron Schiel, Derek Van Westrum
  • Patent number: 7805267
    Abstract: The present invention relates to verification of a transmission margin of various transmission lines transmitting a signal such as a high-speed digital signal and ensures improved verification accuracy. A transmission margin verification apparatus according to the present invention is configured with a measurement unit (e.g., LSI tester 4, network analyzer 6, pulse generator 8, oscilloscope 10) operable to measure a transmission loss and a leading edge waveform of pseudo transmission lines (e.g., transmission lines 56, 62, 66) corresponding to a target device 44 to be verified, and a calculation unit (tester controller 12) operable to reference the transmission line loss and the leading edge waveform measured by the measurement unit, calculate a transmission waveform of the target device, and associate the transmission waveform with a mask of the target device to calculate a transmission margin of the target device.
    Type: Grant
    Filed: December 8, 2004
    Date of Patent: September 28, 2010
    Assignee: Fujitsu Limited
    Inventor: Daita Tsubamoto
  • Patent number: 7756655
    Abstract: An observation apparatus which observers operations of an observation target apparatus, and which includes: an output signal acquisition unit for sequentially acquiring signal values by observing signals outputted by the observation target apparatus; a state storage unit for sequentially storing the acquired signal values; a determination unit for determining whether a first signal value newly acquired is identical with a second signal value which is acquired prior to the first signal value, and which is stored in the state storage unit; and a separation unit for separating and outputting a signal sequence, which includes a plurality of signal values acquired between the first signal value and the second signal value, as transactions of the output signals, on condition that it is determined that the first signal value is identical with the second signal value.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: July 13, 2010
    Assignee: International Business Machines Corporation
    Inventors: Nobuyuki Ohba, Kohji Takano
  • Patent number: 7756654
    Abstract: A test apparatus for testing a device under test includes a multi-strobe generating section that generates a plurality of strobe signals with different phases in each of cycles of an output signal output from the device under test, a plurality of timing comparing sections that obtain a value of the output signal respectively at timings of the plurality of strobe signals, a transition detecting section that generates transition data identifying one of the plurality of strobe signals which is positioned at a transition of the output signal, based on the values of the output signal which are respectively obtained at the timings of the plurality of strobe signals, a transition memory that sequentially stores thereon the transition data input thereto, a selecting section that selects, in association with each of the cycles of the output signal, whether to input the transition data output from the transition detecting section into the transition memory, and a calculating section that calculates jitter of the output
    Type: Grant
    Filed: August 15, 2007
    Date of Patent: July 13, 2010
    Assignee: Advantest Corporation
    Inventors: Kazuhiro Yamamoto, Toshiyuki Okayasu
  • Patent number: 7751996
    Abstract: A D/U ratio is measured for desired and undesired signals in a wireless video transmission system at a shared channel frequency based on a received signal at a geographic location in proximity to regions within respective service areas for the desired and undesired signals. A video tuner demodulates the received signal to generate a baseband video signal. A leveling circuit normalizes the baseband signal. A video processor identifies horizontal sync pulses within the baseband signal, generates a sampled signal comprising the horizontal sync pulses, and removes components of the desired signal from the sampled signal to generate an undesired signal component. A D/U analyzer determines a Fourier transform having a plurality of bins in response to the undesired signal component, identifies at least one of the bins having a spectral peak corresponding to an undesired signal, and calculates the D/U ratio in response to a magnitude of the identified peak.
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: July 6, 2010
    Assignee: Sprint Communications Company L.P.
    Inventors: Giuseppe Ardizzone, Robert C. Tenten
  • Patent number: 7734435
    Abstract: This present specification provides, amongst other things, an electro-optical monitoring system for obtaining a once-per revolution signal based on the surface reflection of a rotating device that mandates non-contacting sensor input in potentially hostile environments. The system can use optical and electronic sections to illuminate and detect surface reflections from the rotating surface using existing mounting locations on the periphery of the machine to be measured. The electronic portion is configured to determine a unique mark as the once-per-revolution marker or allow an attending operator to assign a specific marker based on the observed reflected pattern. The optical portion consists of a light source, receiver, and optics that allow for focused and directed light paths.
    Type: Grant
    Filed: August 15, 2007
    Date of Patent: June 8, 2010
    Assignee: Cognitive Vision Inc.
    Inventors: John Gordon Thomas, Peter James Neild, Raymond Joseph Schumacher
  • Patent number: 7620510
    Abstract: A pulsed ring oscillator circuit for storage cell read timing evaluation provides read strength information. A pulse generator is coupled to a bitline to which the storage cell to be measured is connected. The storage cell thereby forms part of the ring oscillator and the read strength of the storage cell is reflected in the frequency of oscillation. A pulse regeneration circuit is included in the ring so that the storage cell read loading does not cause the oscillation to decay. Alternatively, a counter may be used to count the number of oscillations until the oscillations decay, which also yields a measure of the read strength of the storage cell. The pulse generator may have variable output current, and the current varied to determine a change in current with the storage cell enabled and disabled that produces the same oscillation frequency. The read current is the difference between currents.
    Type: Grant
    Filed: May 28, 2008
    Date of Patent: November 17, 2009
    Assignee: International Business Machines Corporation
    Inventors: Gary D. Carpenter, Jente B Kuang, Kevin J. Nowka, Liang-Teck Pang
  • Patent number: 7620509
    Abstract: A frequency hopping pattern of a frequency hopping signal is detected by use of spectrogram-generating software in a digital storage oscilloscope. By using a spectrogram, a hopping pattern can be determined without having to demodulate the signal, recover the phase or frequency of the carrier, determine optimal sample timing, or determine system timing. A block of data that contains at least one repetition of the hopping pattern in analyzed with respect to known hopping patterns as well as with respect to the duration in time of the relevant symbols of that data.
    Type: Grant
    Filed: October 23, 2006
    Date of Patent: November 17, 2009
    Assignee: Tektronix, Inc.
    Inventor: Richard A. Cameron
  • Patent number: 7617056
    Abstract: A structure includes a step of inputting a numerical value of a parameter, which forms a model formula, by a computer; a step of inputting the numerical value of the parameter to the model formula and calculating a calculation value by the computer; and a step of evaluating degree of a match between an actual measurement value and the calculation value by the computer with an input/output response of an actual device assumed as the actual measurement value, in which the degree of the match is evaluated by a numerical value corresponding to an area of a portion sandwiched between a connecting line of the actual measurement value and a connecting line of the calculation value.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: November 10, 2009
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Mitsuro Seki
  • Patent number: 7460967
    Abstract: Events discovered by an automatic measurement subsystem in the trace of a DSO are visited using a set of event navigation controls. In a TIME Mode the controls operate to display the first of those events, display the next event after the one currently displayed, display the previous event before the one currently displayed, and, display the last event. In a SEVERITY Mode the controls operate to display the best of those events, display the next best event relative to the one currently displayed, display the next worst event before the one currently displayed, and, display the worst event. The sets of navigation controls may be a mode control menu accompanied by four stylized arrow shaped buttons within a GUI that are clicked on by an operator using a mouse. One set of arrow shaped button can serve both modes, or different sets of buttons can serve each respective mode.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: December 2, 2008
    Assignee: Agilent Technologies, Inc.
    Inventor: Christopher P Duff
  • Patent number: 7454301
    Abstract: A jitter calculator engine that includes a core effects module, an input/output (I/O) module, and a phase lock loop (PLL) module is provided. The core effects module estimates core jitter caused by noise effects impacting a core clock network. The I/O module estimates I/O input pin switching effects on a clock network input signal. In one embodiment, the I/O module identifies a relative frequency of switching by I/O pins in the circuit design. The PLL module estimates an effect of a PLL on a signal delivered to the PLL from an I/O pin. The PLL module accounts for I/O input pin switching effects and core jitter. The jitter calculator engine may be in communication with a database and the different designs evaluated may be stored in the database so that the database becomes a repository for the different designs and may provide useful information for future designs.
    Type: Grant
    Filed: August 18, 2006
    Date of Patent: November 18, 2008
    Assignee: Altera Corporation
    Inventors: Nafira Daud, Iliya G. Zamek, Peter Boyle
  • Patent number: 7439515
    Abstract: Correction of scintillation event data from a nuclear medicine imaging system for effects of pulse pile-up is carried out by separating event data packets into total energy and individual detector energy data packets, executing pile-up correction algorithms on each of the separated packets simultaneously using a pipeline processing architecture, and reassembling the corrected data packets into corrected scintillation event data packets. Pulse tail correction information for each individual detector is stored in a storage medium for a present event and immediately preceding event for which correction information exists, which allows individual detector correction information to be retrieved by using a look-up procedure, thereby enabling correction to be performed within a single processor cycle.
    Type: Grant
    Filed: June 13, 2006
    Date of Patent: October 21, 2008
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventor: Donald Bak
  • Patent number: 7415370
    Abstract: A method of compressing values of a waveform of a monitored electrical power signal. The method includes acquiring data representative of periods of the waveform, decomposing the waveform of the power signal into a plurality of components over a plurality of periods of the waveform, compressing the values of at least some of the components over a plurality of periods, and storing these values and extents.
    Type: Grant
    Filed: April 18, 2004
    Date of Patent: August 19, 2008
    Assignee: ELSPEC Ltd.
    Inventors: Pol Nisenblat, Amir Mordehay Broshi, Ofir Efrati
  • Patent number: 7409305
    Abstract: A methor for storage cell read timing evaluation provides read strength information by using a pulsed ring oscillator. A pulse generator is coupled to a bitline to which the storage cell to be measured is connected. The storage cell thereby forms part of the ring oscillator and the read strength of the storage cell is reflected in the frequency of oscillation. A pulse regeneration circuit is included in the ring so that the storage cell read loading does not cause the oscillation to decay. Alternatively, a counter may be used to count the number of oscillations until the oscillations decay, which also yields a measure of the read strength of the storage cell. The pulse generator may have variable output current, and the current varied to determine a change in current with the storage cell enabled and disabled that produces the same oscillation frequency. The read current is the difference between currents.
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: August 5, 2008
    Assignee: International Business Machines Corporation
    Inventors: Gary D. Carpenter, Jente B Kuang, Kevin J. Nowka, Liang-Teck Pang
  • Patent number: 7409320
    Abstract: A system, method and program product for monitoring a complex signal for ultrasensitive detection of state changes, or for signature recognition and classification is provided. A complex signal is decomposed periodically for empirical modeling. Wavelet analysis, frequency band filtering or other methods may be used to decompose the complex signal into components. A library of signature data may be referenced for selection of a recognized signature in the decomposed complex signal. The recognized signature may indicate data being carried in the complex signal. Estimated signal data may be generated for determination of an operational state of a monitored process or machine using a statistical hypothesis test with reference to the decomposed input signal.
    Type: Grant
    Filed: May 11, 2005
    Date of Patent: August 5, 2008
    Assignee: Smartsignal Corporation
    Inventor: Stephan W. Wegerich
  • Patent number: 7401008
    Abstract: A method and system for intrinsic timescale decomposition, filtering, and automated analysis of signals of arbitrary origin or timescale including receiving an input signal, determining a baseline segment and a monotonic residual segment with strictly negative minimum and strictly positive maximum between two successive extrema of the input signal, and producing a baseline output signal and a residual output signal. The method and system also includes determining at least one instantaneous frequency estimate from a proper rotation signal, determining a zero-crossing and a local extremum of the proper rotation signal, and applying interpolation thereto to determine an instantaneous frequency estimate thereof.
    Type: Grant
    Filed: May 1, 2006
    Date of Patent: July 15, 2008
    Inventors: Mark G. Frei, Ivan Osorio
  • Patent number: 7369951
    Abstract: A signal processing system for detecting purposive signals includes an input receiving a signal having a signal characteristic subject to user manipulation. An activation detector compares a property of the signal characteristic to one or more signal characteristic property thresholds over time. A filter module determines whether the signal characteristic is purposively manipulated based on an amount of time preceding or following an occurrence of the property exceeding or falling below one or more signal characteristic property thresholds.
    Type: Grant
    Filed: February 25, 2005
    Date of Patent: May 6, 2008
    Assignee: Board of Trustees of Michigan State University
    Inventors: Stephen R. Blosser, John B. Eulenberg
  • Patent number: 7346464
    Abstract: A gait waveform feature extracting method and an individual identification system extract features of the gait waveform. A one-step waveform corresponding to one step of a walking movement is specified using, as an index, a peak amplitude corresponding to a state where substantially a whole bottom surface of one foot is in contact with the ground and a toe of the other foot is just after leaving the ground among the electric field displacement formed on the human body in accordance with the human body's walking movements. Based on the specified one-step waveform, the features of the one-step waveform are extracted, so that the peak amplitude appears without influence from electric-charge interference between the right and left legs. Accordingly, the one-step waveform reflects the actual one step of the walking movement, and therefore, the features of the one-step waveform can be precisely extracted.
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: March 18, 2008
    Assignee: Sony Corporation
    Inventor: Kiyoaki Takiguchi
  • Patent number: 7308372
    Abstract: A method, an apparatus, and a system for phase jitter measurement circuits are described herein.
    Type: Grant
    Filed: January 26, 2006
    Date of Patent: December 11, 2007
    Assignee: Intel Corporation
    Inventors: Michael C. Rifani, Keng L. Wong, Christopher Pan
  • Patent number: 7292947
    Abstract: A system and method of estimating random and periodic phase noise components based on measurement of phase jitter in a given signal uses a difference filter to attenuate low frequency random noise components and a process of obtaining timing measurements at a plurality of sampling frequencies in order to de-alias identified noise spurs. Such technology is especially well-suited for devices capable of undersampling a jitter signal, such as continuous time interval analyzers (CTIAs).
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: November 6, 2007
    Assignee: Guide Technology, Inc.
    Inventor: Sassan Tabatabaei
  • Patent number: 7268783
    Abstract: Image alias rejection when converting a high resolution rasterized waveform to a lower resolution rasterized waveform for display uses a statistical filter. The statistical filter provides a shaped probability density function either by combining the outputs of multiple random number generators, such as linear feedback shift registers, or by using a corresponding look-up table to produce a dither signal. The statistical filter may be applied to one or both of the dimensional values for each data point of the high resolution rasterized waveform by combining the dimensional values with the dither signal. The resulting filtered dimensional values may then be subsampled, such as by truncation, to produce values for a lower resolution rasterized waveform display.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: September 11, 2007
    Assignee: Tektronix, Inc.
    Inventors: Robert W. Parish, Scott E. Zink, Evan Albright
  • Patent number: 7260485
    Abstract: Various computer-implemented methods and systems are provided. One computer-implemented method includes determining a ratio between output signals generated by detecting spectra for a single event in two or more detection windows. The spectra are characteristic of different materials. At least a portion of the spectra overlap in at least one of the two or more detection windows. The method also includes determining which of the different materials are associated with the ratio. One embodiment of a system includes one or more detectors configured to detect spectra for a single event in two or more detection windows. The spectra may include spectra as described above. The one or more detectors are also configured to generate output signals in response to the detected spectra. The system also includes a processor configured to determine a ratio between the output signals and to determine which of the different materials are associated with the ratio.
    Type: Grant
    Filed: July 6, 2004
    Date of Patent: August 21, 2007
    Assignee: Luminex Corporation
    Inventor: Don J. Chandler
  • Patent number: 7254500
    Abstract: A method of displaying signals containing a spatial and a temporal aspect, where multiple signals are received by multiple sensors. The received signals are decomposed into separate signal components within one or more distinct frequency bands. Signal components are isolated within each frequency band based on differences between the signal components within the same frequency band, and the signal components are displayed. The signal components may be analyzed to determine a time course of activity and a location of the associated source. Representations of the source may also be generated and displayed to aid in monitoring the signals.
    Type: Grant
    Filed: March 31, 2004
    Date of Patent: August 7, 2007
    Assignee: The Salk Institute for Biological Studies
    Inventors: Scott Makeig, Jörn Anemüller
  • Patent number: 7254469
    Abstract: A system and a machine-implemented method for rendering, on a display device, a first data graph concerning data received from a first data source. A second data graph concerning data received from a second data source is rendered on the display device, and superimposed onto the first data graph to generate a superimposed data graph.
    Type: Grant
    Filed: November 18, 2004
    Date of Patent: August 7, 2007
    Assignee: Snap-On Incorporated
    Inventors: Michael J. Robb, William Welch, James Panko
  • Patent number: 7228262
    Abstract: An aspect of the present invention provides a semiconductor integrated circuit verification system that includes a compiler configured to receive circuit descriptions of a semiconductor integrated circuit to be verified and create a circuit database, a circuit analysis unit configured to receive the circuit database to analyze the circuitry inside the semiconductor integrated circuit based on the circuit database, the circuit analysis unit configured to determine the timing at which the abstraction level of the circuit is switched and generate a simulation object, and a simulation execution unit configured to receive the simulation object and conduct a simulation of the semiconductor integrated circuit based on the simulation object.
    Type: Grant
    Filed: July 1, 2004
    Date of Patent: June 5, 2007
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kenichi Anzou, Chikako Tokunaga, Takashi Matsumoto
  • Patent number: 7191100
    Abstract: A method and system for physiological gating for radiation therapy is disclosed. A method and system for detecting and predictably estimating regular cycles of physiological activity or movements is disclosed. Another disclosed aspect of the invention is directed to predictive actuation of gating system components. Yet another disclosed aspect of the invention is directed to physiological gating of radiation treatment based upon the phase of the physiological activity.
    Type: Grant
    Filed: September 1, 2005
    Date of Patent: March 13, 2007
    Assignee: Varian Medical Systems Technologies, Inc.
    Inventor: Hassan Mostafavi
  • Patent number: 7164997
    Abstract: Disclosed herein is a method and system for calibrating line drive currents in systems that generate data signals by varying line drive currents and that interpret the data signals by comparing them to one or more reference voltages. The calibration includes varying the line drive current at a transmitting component. At different line drive currents, a receiver reference voltage is varied while the transmitting component transmits data to a receiving component. At each line drive current, the system records the highest and lowest receiver reference voltages at which data errors do not occur. The system then examines the recorded high and low receiver reference voltages to determine a desirable line drive current.
    Type: Grant
    Filed: September 23, 2005
    Date of Patent: January 16, 2007
    Assignee: Rambus Inc.
    Inventors: Pradeep Batra, Rick A. Rutkowski
  • Patent number: 7158920
    Abstract: The apparatus reduces the amount of correction for noise value error, so as to reduce work needed for correction to ensure error avoidance, and to improve the freedom of layout design, and to reduce load on DA. Based on a timing chart of signal transfer on each wire, the last edge appearance timing in the signal waveform of a victim whose noise value exceeds a limit value is compared with the last edge appearance timing in the signal waveform of an aggressor, to evaluate the noise value error in the victim. The apparatus is used in static noise checking of cell arrangement and inter-cell wiring after such cell arrangement and inter-cell wiring are performed at design of integrated circuits such as LSIs.
    Type: Grant
    Filed: November 3, 2004
    Date of Patent: January 2, 2007
    Assignee: Fujitsu Limited
    Inventor: Yoichiro Ishikawa
  • Patent number: 7152008
    Abstract: In general, in one aspect, the disclosure describes an apparatus for calibrating signals. The apparatus includes a receiver pair to receive a differential signal and a reference signal and to generate at least one comparison signal reflecting where a first signal of the differential signal and a second signal of the differential signal cross each other with respect to the reference signal. The second signal is a negative compliment of the first signal. The apparatus further includes a phase detector to determine a phase error based on the at least one comparison signal. The apparatus also includes an edge delay control driver pair to adjust the differential signal based on the phase error.
    Type: Grant
    Filed: December 15, 2004
    Date of Patent: December 19, 2006
    Assignee: Intel Corporation
    Inventors: John F. Zumkehr, James E. Chandler, Renjeng Chiang
  • Patent number: 7079986
    Abstract: A system and method for determining from an arbitrary signal a characteristic signature or other characterizing feature and for distinguishing signals associated with one specific condition from those associated with one or more other conditions. The system uses dictionaries of plural sets of basis signal elements, for example, combinations of orthogonal bases with different characteristics. It optimizes the fit of part of an arbitrary signal to one or more elements of one class of basis signals from a dictionary and iteratively fits the remainder of the arbitrary signal to elements of an optimal class of basis signals, either the original or a different class depending on the goodness of match between the residual part of the signal and the subsequent basis class.
    Type: Grant
    Filed: December 31, 2003
    Date of Patent: July 18, 2006
    Inventor: Jeffrey M. Sieracki