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Class 708/426 - Autocorrelation


Subclass of Class 708 - Electrical computers: arithmetic processing and calculating
Definition: Subject matter in which both series of discrete values are
No. of patents: 58
Last issue date: 06/12/2007


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NumberTitleIssue Date
7230176Method and apparatus to modify pitch estimation function in acoustic signal musical note pitch extraction
In one aspect thereof this invention provides a method to estimate pitch in an acoustic signal. The method includes initializing a function ƒt and a time t, where t=0, x′0=ƒ0(F0), x′0 is a pitch estimate a...
06/12/2007
7215126Apparatus and method for testing a signal path from an injection point
The invention includes an apparatus and method for testing an electronic signal path. The apparatus includes a signal generator (102) configured to inject a test signal into the electronic signal path at an injection point when coupled to the signal path. The...
05/08/2007
7191100Method and system for predictive physiological gating of radiation therapy
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...
03/13/2007
7181670Pipeline architecture for maximum a posteriori (MAP) decoders
The sliding window approach to pipeline maximum a posteriori (MAP) decoder architecture is modified to decrease processing time. Once the forward metrics have been calculated for the first sliding window of the decoder, the reverse metrics for each window are calcul...
02/20/2007
7133887Detection and identification of stable PRI patterns using multiple parallel hypothesis correlation algorithms
An algorithmic approaches that can be implemented in software/firmware/hardware that filters out stable PRI patterns detected within a system that is prosecuting against radar based transmissions are disclosed. The algorithms allow downstream computing assets to con...
11/07/2006
6996291Systems and methods for correlating images in an image correlation system with reduced computational loads
After one or both of a pair of images are obtained, an auto-correlation function for one of those images is generated to determine a smear amount and possibly a smear direction. The smear amount and direction are used to identify potential locations of a peak portio...
02/07/2006
6959266Method and system for predictive physiological gating of radiation therapy
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...
10/25/2005
6788785Stable adaptive filter and method
A Fast Affine Projection (FAP) adaptive filter and method of adaptive filtering are disclosed, which reduce instability associated with FAP filters caused by error accumulation in the process of inversion of an autocorrelation matrix. The method provides updating of...
09/07/2004
6754340Stable adaptive filter and method
Stable adaptive filter and method are disclosed. The invention solves a problem of instability associated with Fast Affine Projection adaptive filters caused by error accumulation in an inversion process of an auto-correlation matrix. The Stable FAP uses a simplific...
06/22/2004
6724838Methods and apparatus to despread dual codes for CDMA systems
A correlator and matched filter for use with coded transmission, such as CDMA, form new codes from the sums and differences of the original codes, where only one of the new codes is non-zero for each element position and effect hardware savings using the new codes.
04/20/2004
6693975Low-order HDSL2 transmit filter
The present invention comprises a method of obtaining coefficients for a transmit filter such that the power spectral density of the output for the different frequencies comes close to but does not exceed a maximum power spectral density of a communicatio...
02/17/2004
6427121Global positioning system tag system
A communications system for determining the position and velocity of an object using a plurality of GPS signals transmitted by a plurality of GPS sources includes an interrogator remote from the object and responsive to the plurality of GPS signals. The i...
07/30/2002
6408107Rapid convolution based large deformation image matching via landmark and volume imagery
An apparatus and method for image registration of a template image with a target image with large deformation. The apparatus and method involve computing a large deformation transform based on landmark manifolds, image data or both. The apparatus and meth...
06/18/2002
6401106Methods and apparatus for performing correlation operations
Methods and apparatus for implementing an enhanced digital signal processor through the addition of modular computation units which can be operated in parallel are described. In various embodiments the computation units are implemented as configurable com...
06/04/2002
6370208Correlator for CDMA applications
Correlators categorize different combinations of code sequences and identify locations for which code elements for the code sequences are equivalent. Then, a dispreading operation is performed once for each equivalent combination. The equivalent combinati...
04/09/2002
6038271Correlator with cascade data paths to facilitate expansion of correlator length
A correlator is disclosed and includes a data bus for receiving blocks of n bit parallel in phase (I) and n bit parallel quadrature (Q) signal data and n bit parallel I and Q reference data from respective I and Q signal channels and I and Q reference cha...
03/14/2000
5675320Glass break detector
The glass break detector uses sampling techniques and statistical analysis of the acoustic signal to determine whether a random type signal typical of a glass break event has been detected. A host of experiments are analysed and the collective results inv...
10/07/1997
5673210Signal restoration using left-sided and right-sided autoregressive parameters
Signal reconstruction methods reconstruct a missing portion of a signal from a first known portion of the signal preceding the missing portion, and a second known portion of the signal succeeding the missing portion. The first known portion of the signal ...
09/30/1997
5629883Correlation detector
A correlation detector capable of obtaining a more correct and natural correlation value. The correlation detector outputs a correlation value representative of autocorrelation in accordance with a sum (r+ra) of the number r of consecutive autocorrelated ...
05/13/1997
5471137System checking and troubleshooting package for an electronic metering device
An integral electronic meter system diagnostics package including a microprocessor, storage memory, logic for automatically and periodically performing a pre-select series of system diagnostic tests, and recording any results which exceed predefined progr...
11/28/1995
5417114Echo based detecting apparatus employing signal generator and correlator
An ultrasonic detecting apparatus which includes a sequence generating means and a transmission signal generating means for generating a transmission signal corresponding to the sequence. The detecting apparatus also includes a transmitting means to trans...
05/23/1995
5415045Apparatus and method for detecting flaws in and inspecting an object
An ultrasonic detecting apparatus which includes a generator which generates more than three transmission signals. The detecting apparatus also includes a transmitter/receiver which transmits waves, which may be ultrasonic waves, to an object and receives...
05/16/1995
5412590Appliance temperature sensor having noise filtering
An appliance temperature sensor for acquisition of usable data in a noisy environment collects a plurality of temperature readings in a buffer. It then screens that batch of data to determine whether or not its noise content is acceptably low before forwa...
05/02/1995
5404320Autocorrelation processing method and apparatus
Autocorrelation processing finds a series of equally spaced pulses and noise. Pulses that are very narrow with inter-pulsed durations of several hundred times the width of the pulse are processed. A threshold detector receives an input from a sensor, the ...
04/04/1995
5343404Precision digital multimeter and waveform synthesizer for multi-signals with distorted waveforms embedded in noise
Electrical signals suffer usually from distortion and noise. This invention gives a very precise and simple digital circuitry as well as basis for software to measure the phase difference between harmonic components of any of two of the input signals. The...
08/30/1994
5335248Apparatus for correlating multi-frequency signals
An apparatus and method of processing transmitted signals through the use of correlator means and RAM means thereby accomplishing synchronization and data interpretation. Specifically, a plurality of correlators are coupled to RAM means which cooperate to...
08/02/1994
5299144Architecture for covariance matrix generation
The present invention provides an apparatus and method for generating a covariance matrix. According to one aspect of the invention, an apparatus is provided which generally includes a memory, a circular buffer, a multiply-accumulator, and an arithmetic l...
03/29/1994
5272923Inspection apparatus
An inspection apparatus utilizing a pulse compression technique is described which comprises a signal generator, a transmission/reception probe; first and second correlators and an adder. The signal generator generates a composite transmission signal cons...
12/28/1993
5257364Method for generating a correlated sequence of variates with desired marginal distribution for testing a model of a communications system
To provide a time series having correlated interarrival times for use in traffic and queueing studies, an independent identically distributed random number stream is first transformed to a sequence of correlated uniform variates by a special modulo-1 auto...
10/26/1993
5203823Detecting apparatus
An ultrasonic non-destructive inspecting apparatus is constructed to comprise a transmission signal generator, an ultrasonic probe, a correlator and an adder wherein a transmission signal based on a sequence is generated and transmitted to a specimen, its...
04/20/1993
5148385Serial systolic processor
A serial systolic processor for performing neural network functions. A serial processor (90) provides the digital processing circuits for processing an input serial data stream applied to a serial input (20). A memory (29) stores digital signals represent...
09/15/1992
5065629Ultrasonic insection apparatus
An ultrasonic flaw inspecting apparatus is provided in which the transmission signals comprising N number of the binary code sequences having sharp autocorrelation functions are input to an object to be inspected by a single transducer for transmission an...
11/19/1991
5048060Digital signal receiving circuit with means for controlling a baud rate sampling phase by a power of sampled signals
In a baude rate sampling type receiving circuit for use in a system for transmitting digital data signal at a transmission baude rate, in order to control the sampling phase at the optimum phase, desired elements of an autocorrelation function of a series...
09/10/1991
5007101Auto-correlation circuit for use in pattern recognition
An auto-correlation unit for pattern recognition to obtain auto-correlation functions as for sampled signals is disclosed N pieces of sample values Xn (n=0 to N-1)are extracted from a series of the sample values expressed with an accuracy of op...
04/09/1991
4979110Characterizing the statistical properties of a biological signal
The statistical properties of a biological signal intermittently obscured by a relatively independent biological process are estimated by noting the time intervals during which the obscuring process is occurring. From the time intervals, a windowing funct...
12/18/1990
4860239Correlator with variably normalized input signals
A digital complex correlator for correlating in-phase and quadrature components of data samples by shearing the in-phase and quadrature data pairs by a predetermined multiple of the noise in the correlation window under analysis. The sheared data is multi...
08/22/1989
4860357Binary autocorrelation processor
A system for converting known speech segments into machine storable binary signals for the purpose of later attempting a match between a stored signal and an incoming signal using autocorrelation techniques. Through the use of a clipper and a sample and h...
08/22/1989
4791599Auto-correlation arrangement
An auto-correlation apparatus for producing N auto-correlation values R(k), (k=0, . . . N-1) of an auto-correlation function of a sequence of digital samples x(n), (n=-.infin. . . . 0, . . . p) of an input signal, each sample being encoded as words of "b"...
12/13/1988
4766563Auto-correlation filter
A digital filter for obtaining the power of a filtered signal passing through a particular frequency band for each frame (short time division) includes an auto-correlation circuit for calculating the auto-correlation function of the input signal, and a su...
08/23/1988
4646323Method and system for digital data transmission
A system and method for digital transmission of pulses of a predetermined duration includes a transmitter (30) and a receiver (40). A data stream (ai) is transformed into a narrow band signal spectrum and following transmission is demodulated t...
02/24/1987
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