Patents by Inventor Noam Galperin
Noam Galperin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8885738Abstract: A device and method for receiving and processing single carrier and multiple carrier signals through substantially common elements within a receiver that uses a radix 2 FFT on the signal, equalizes both types of signals in the frequency domain and then, for the multiple carrier signal performs a polynomial interpolation to bring the signal to symbol rate and for the single carrier signal performs an IFFT and samples the output to produce a signal at symbol rate.Type: GrantFiled: March 26, 2009Date of Patent: November 11, 2014Assignee: CSR Technology Inc.Inventors: Yossef Cohen, Noam Galperin, Eshel Hason
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Patent number: 8073046Abstract: A signal receiver inputs a signal, computes a set of equalizer tap values during a signal acquisition phase by applying an algorithm iteratively to a given set of training data contained within the signal, and uses the set of equalizer tap values to perform signal equalization during the signal acquisition phase. The algorithm includes computing and applying phase correction to the pre-equalized signal at each adaptation step to correct for phase error related to the main path only, of the input signal.Type: GrantFiled: June 14, 2007Date of Patent: December 6, 2011Assignee: Zoran CorporationInventors: Yossef Cohen, Eshel Hason, Noam Galperin
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Patent number: 7990845Abstract: A system and method for determining an FFT window location for reception of an OFDM signal received over a transmission channel. The OFDM signal includes a plurality of symbols each having a guard interval. The system includes a correlation module that determines a location of maximum correlation in a first symbol, an FFT module to perform an FFT on the OFDM signal based upon an initial FFT window location, and an adjustment module. The adjustment module determines a plurality of permissible echo location options based upon the initial FFT window location, selects a permissible echo location option that corresponds most closely to the location of maximum correlation, and adjusts the initial FFT window location based upon the selected permissible echo location option so that the adjusted FFT window location includes substantially all of a useful symbol length of the first symbol while a maximum number of echoes are included within the guard interval of the first symbol.Type: GrantFiled: February 3, 2010Date of Patent: August 2, 2011Assignee: Zoran CorporationInventors: Itamar Gold-Gavriely, Noam Galperin
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Patent number: 7903750Abstract: A system for identifying transmission parameters of an OFDM signal transmitted according to a transmitter clock includes a first correlator to receive and correlate samples of the signal sampled according to a receiver clock and provide a first metric indicative of whether the signal has a first transmission mode, a plurality of additional correlators, operable in parallel with the first correlator, to receive and correlate the samples of the signal sampled according to the receiver clock and provide a plurality of additional metrics indicative of whether the signal has a second transmission mode and whether the receiver clock is aligned with or displaced by at least one sample over one OFDM symbol relative to the transmitter clock, and a processor. The processor receives the metrics, and determines whether the signal has the first or second transmission mode and whether the receiver clock is aligned or displaced by the at least one sample relative to the transmitter clock.Type: GrantFiled: September 11, 2007Date of Patent: March 8, 2011Assignee: Zoran CorporationInventors: Noam Galperin, Dor Amos, Yossef Cohen, Itamar Feigenbaum
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Patent number: 7756200Abstract: A method of operating an equalizer includes combining a Least Mean Squares (LMS) algorithm and a Least Squares (LS) algorithm to determine a set of equalizer tap values to be used in processing a signal. A channel impulse response (CIR) is computed, and an equalizer taps interval is then determined based on the CIR. The LS algorithm is used to determine a set of equalizer major taps based on the interval, and the LMS algorithm is used to determine a set of equalizer minor taps based on the interval.Type: GrantFiled: March 22, 2007Date of Patent: July 13, 2010Assignee: Zoran CorporationInventors: Yossef Cohen, Noam Galperin
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Publication number: 20100142659Abstract: A system and method for determining an FFT window location for reception of an OFDM signal received over a transmission channel. The OFDM signal includes a plurality of symbols each having a guard interval. The system includes a correlation module that determines a location of maximum correlation in a first symbol, an FFT module to perform an FFT on the OFDM signal based upon an initial FFT window location, and an adjustment module. The adjustment module determines a plurality of permissible echo location options based upon the initial FFT window location, selects a permissible echo location option that corresponds most closely to the location of maximum correlation, and adjusts the initial FFT window location based upon the selected permissible echo location option so that the adjusted FFT window location includes substantially all of a useful symbol length of the first symbol while a maximum number of echoes are included within the guard interval of the first symbol.Type: ApplicationFiled: February 3, 2010Publication date: June 10, 2010Applicant: ZORAN CORPORATIONInventors: Itamar Gold-Gavriely, Noam Galperin
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Patent number: 7684313Abstract: A system and method for determining an FFT window location for reception of an OFDM signal received over a transmission channel. The OFDM signal includes a plurality of symbols each having a guard interval. The system includes a correlation module that determines a location of maximum correlation in a first symbol, an FFT module to perform an FFT on the OFDM signal based upon an initial FFT window location, and an adjustment module. The adjustment module determines a plurality of permissible echo location options based upon the initial FFT window location, selects a permissible echo location option that corresponds most closely to the location of maximum correlation, and adjusts the initial FFT window location based upon the selected permissible echo location option so that the adjusted FFT window location includes substantially all of a useful symbol length of the first symbol while a maximum number of echoes are included within the guard interval of the first symbol.Type: GrantFiled: March 30, 2007Date of Patent: March 23, 2010Assignee: Zoran CorporationInventors: Itamar Gold-Gavriely, Noam Galperin
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Patent number: 7668898Abstract: A calculating circuit and a method for generating an output signal representing an output number approximating an N-th root and/or a reciprocal of an input number represented by an input signal are described. The calculating circuit includes a subtractor circuit, an integrator circuit, and a multiplier circuit. The subtractor circuit responsive to a first signal and a feedback signal and configured for generating an error signal representing a difference between the first signal and the feedback signal. The integrator circuit responsive to the error signal and configured for computing the output signal. The multiplier circuit responsive to the output signal and configured for generating a feedback signal.Type: GrantFiled: December 27, 2005Date of Patent: February 23, 2010Assignee: Zoran CorporationInventors: Yonatan Manor, Noam Galperin
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Patent number: 7616684Abstract: A circuit is configured to receive and process a signal that includes in-phase and out-of-phase components that correspond to in-phase and out-of-phase components of a time sequence of symbols. A phase sensor in the circuit is configured to determine a phase value in accordance with an equalized version of the in-phase component of the signal and the in-phase component of the time sequence of symbols. The phase sensor is further configured to generate an approximation to the out-of-phase component of the signal in accordance with a Hilbert function of order k greater than 1. Terms in the approximation that correspond to future samples of the in-phase component of the signal are replaced with terms that correspond to past samples of an error that corresponds to a difference between samples of the in-phase component of the signal and an output from a detector.Type: GrantFiled: March 28, 2006Date of Patent: November 10, 2009Assignee: Zoran CorporationInventors: Yossef Cohen, Noam Galperin, Ronen Even-Zur
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Publication number: 20090244399Abstract: A device and method for receiving and processing single carrier and multiple carrier signals through substantially common elements within a receiver that uses a radix 2 FFT on the signal, equalizes both types of signals in the frequency domain and then, for the multiple carrier signal performs a polynomial interpolation to bring the signal to symbol rate and for the single carrier signal performs an IFFT and samples the output to produce a signal at symbol rate.Type: ApplicationFiled: March 26, 2009Publication date: October 1, 2009Applicant: Zoran CorporationInventors: Yossef Cohen, Noam Galperin, Eshel Hason
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Publication number: 20090067515Abstract: A system for identifying transmission parameters of an OFDM signal transmitted according to a transmitter clock includes a first correlator to receive and correlate samples of the signal sampled according to a receiver clock and provide a first metric indicative of whether the signal has a first transmission mode, a plurality of additional correlators, operable in parallel with the first correlator, to receive and correlate the samples of the signal sampled according to the receiver clock and provide a plurality of additional metrics indicative of whether the signal has a second transmission mode and whether the receiver clock is aligned with or displaced by at least one sample over one OFDM symbol relative to the transmitter clock, and a processor. The processor receives the metrics, and determines whether the signal has the first or second transmission mode and whether the receiver clock is aligned or displaced by the at least one sample relative to the transmitter clock.Type: ApplicationFiled: September 11, 2007Publication date: March 12, 2009Inventors: Noam Galperin, Dor Amos, Yossef Cohen, Itamar Feigenbaum
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Publication number: 20080310493Abstract: A signal receiver inputs a signal, computes a set of equalizer tap values during a signal acquisition phase by applying an algorithm iteratively to a given set of training data contained within the signal, and uses the set of equalizer tap values to perform signal equalization during the signal acquisition phase. The algorithm includes computing and applying phase correction to the pre-equalized signal at each adaptation step to correct for phase error related to the main path only, of the input signal.Type: ApplicationFiled: June 14, 2007Publication date: December 18, 2008Applicant: Zoran CorporationInventors: Yossef Cohen, Eshel Hason, Noam Galperin
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Patent number: 7447282Abstract: A synchronization unit for performing timing synchronization in the time domain includes storage, a multiplier, a signal analyzer, and a timing error estimation unit. The storage stores a reference signal. The multiplier calculates a sum of minus one product shift and a sum of plus one product shift based on the reference signal. The signal analyzer calculates left and right cross-correlation points based on the sum or minus one product shift and the sum of plus one product shift. The timing error estimation unit estimates a timing error of a received signal based on the left cross-correlation point and right cross-correlation point.Type: GrantFiled: April 9, 2007Date of Patent: November 4, 2008Assignee: Zoran CorporationInventors: Noam Galperin, Yonatan Manor
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Publication number: 20080239941Abstract: A system and method for determining an FFT window location for reception of an OFDM signal received over a transmission channel. The OFDM signal includes a plurality of symbols each having a guard interval. The system includes a correlation module that determines a location of maximum correlation in a first symbol, an FFT module to perform an FFT on the OFDM signal based upon an initial FFT window location, and an adjustment module. The adjustment module determines a plurality of permissible echo location options based upon the initial FFT window location, selects a permissible echo location option that corresponds most closely to the location of maximum correlation, and adjusts the initial FFT window location based upon the selected permissible echo location option so that the adjusted FFT window location includes substantially all of a useful symbol length of the first symbol while a maximum number of echoes are included within the guard interval of the first symbol.Type: ApplicationFiled: March 30, 2007Publication date: October 2, 2008Applicant: Zoran CorporationInventors: Itamar Gold-Gavriely, Noam Galperin
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Publication number: 20080232453Abstract: A method of operating an equalizer includes combining a Least Mean Squares (LMS) algorithm and a Least Squares (LS) algorithm to determine a set of equalizer tap values to be used in processing a signal. A channel impulse response (CIR) is computed, and an equalizer taps interval is then determined based on the CIR. The LS algorithm is used to determine a set of equalizer major taps based on the interval, and the LMS algorithm is used to determine a set of equalizer minor taps based on the interval.Type: ApplicationFiled: March 22, 2007Publication date: September 25, 2008Applicant: Zoran CorporationInventors: Yossef Cohen, Noam Galperin
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Patent number: 7346131Abstract: A synchronization unit for performing fine synchronization in the Time Domain, the synchronization unit includes a storage configured to store reference signals. A multiplier capable of calculating sum of zero product shift, sum of minus one product shift, and sum of plus one product shift, based on the reference signals. A signal analyzer capable of computing left, center, and right cross-correlation points based on the sum of minus one product shift, the sum of plus one product shift, and the sum of zero product shift. A timing error estimation unit capable of estimating timing error of the received signal based on the left cross-correlation point and the right cross-correlation point. A phase estimation unit capable of estimating common phase error of the received signal based on the sum of zero product shift.Type: GrantFiled: July 10, 2002Date of Patent: March 18, 2008Assignee: Zoran CorporationInventors: Noam Galperin, Yonatan Manor
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Publication number: 20080063041Abstract: A signal receiver inputs a signal, computes a set of equalizer tap values during a signal acquisition phase by applying an algorithm iteratively to a given set of training data contained within the signal, and uses the set of equalizer tap values to process the signal during the signal acquisition phase.Type: ApplicationFiled: September 8, 2006Publication date: March 13, 2008Inventors: Noam Galperin, Yossef Cohen, Avraham Epstein
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Publication number: 20070177686Abstract: A synchronization unit for performing timing synchronization in the time domain includes storage, a multiplier, a signal analyzer, and a timing error estimation unit. The storage stores a reference signal. The multiplier calculates a sum of minus one product shift and a sum of plus one product shift based on the reference signal. The signal analyzer calculates left and right cross-correlation points based on the sum or minus one product shift and the sum of plus one product shift. The timing error estimation unit estimates a timing error of a received signal based on the left cross-correlation point and right cross-correlation point.Type: ApplicationFiled: April 9, 2007Publication date: August 2, 2007Inventors: Noam Galperin, Yonatan Manor
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Publication number: 20060220725Abstract: A circuit is configured to receive and process a signal that includes in-phase and out-of-phase components that correspond to in-phase and out-of-phase components of a time sequence of symbols. A phase sensor in the circuit is configured to determine a phase value in accordance with an equalized version of the in-phase component of the signal and the in-phase component of the time sequence of symbols. The phase sensor is further configured to generate an approximation to the out-of-phase component of the signal in accordance with a Hilbert function of order k greater than 1. Terms in the approximation that correspond to future samples of the in-phase component of the signal are replaced with terms that correspond to past samples of an error that corresponds to a difference between samples of the in-phase component of the signal and an output from a detector.Type: ApplicationFiled: March 28, 2006Publication date: October 5, 2006Inventors: Yosef Cohen, Noam Galperin, Ronen Even-Tzur
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Patent number: 7099628Abstract: A system and method for enhancing the reception of a single carrier signal. The single carrier signal includes periodic training signal and data. The system includes a transmitter configured such that L symbols of either the beginning or end of the N symbols of the training signal, where L<N, are duplicated at either the end or the beginning of the training signal, respectively. The system further includes a receiver configured to receive the modified training signal for the calculation of FIR coefficients in a single pass and without the need for least mean square (LMS) methods or the like.Type: GrantFiled: October 14, 2004Date of Patent: August 29, 2006Assignee: Zoran CorporationInventors: Noam Galperin, Ariel Zohar, Yonatan Manor, Rafi Retter