Patents by Inventor Seyedmohammadreza Motaghiannezam
Seyedmohammadreza Motaghiannezam 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: 10992377Abstract: A receiver applies a calibration method to compensate for skew between input channels. The receiver skew is estimated by observing the coefficients of an adaptive equalizer which adjusts the coefficients based on time-varying properties of the multi-channel input signal. The receiver skew is compensated by programming the phase of the sampling clocks for the different channels. Furthermore, during real-time operation of the receiver, channel diagnostics is performed to automatically estimate differential group delay and/or other channel characteristics based on the equalizer coefficients using a frequency averaging or polarization averaging approach. Framer information can furthermore be utilized to estimate differential group delay that is an integer multiple of the symbol rate. Additionally, a DSP reset may be performed when substantial signal degradation is detected based on the channel diagnostics information.Type: GrantFiled: April 8, 2020Date of Patent: April 27, 2021Assignee: INPHI CORPORATIONInventors: Shih Cheng Wang, Seyedmohammadreza Motaghiannezam, Matthew C. Bashaw
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Patent number: 10763972Abstract: A timing recovery system generates a sampling clock to synchronize sampling of a receiver to a symbol rate of an incoming signal. The input signal is received over an optical communication channel. The receiver generates a timing matrix representing coefficients of a timing tone detected in the input signal. The timing tone representing frequency and phase of a symbol clock of the input signal and has a non-zero timing tone energy. The receiver computes a rotation control signal based on the timing matrix that represents an amount of accumulated phase shift in the input signal relative to the sampling clock. A numerically controlled oscillator is controlled to adjust at least one of the phase and frequency of the sampling clock based on the rotation control signal.Type: GrantFiled: November 25, 2019Date of Patent: September 1, 2020Assignee: INPHI CORPORATIONInventors: Mario Rafael Hueda, Mauro Marcelo Bruni, Federico Nicolas Paredes, Hugo Santiago Carrer, Diego Ernesto Crivelli, Oscar Ernesto Agazzi, Norman L. Swenson, Seyedmohammadreza Motaghiannezam
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Publication number: 20200235808Abstract: A receiver applies a calibration method to compensate for skew between input channels. The receiver skew is estimated by observing the coefficients of an adaptive equalizer which adjusts the coefficients based on time-varying properties of the multi-channel input signal. The receiver skew is compensated by programming the phase of the sampling clocks for the different channels. Furthermore, during real-time operation of the receiver, channel diagnostics is performed to automatically estimate differential group delay and/or other channel characteristics based on the equalizer coefficients using a frequency averaging or polarization averaging approach. Framer information can furthermore be utilized to estimate differential group delay that is an integer multiple of the symbol rate. Additionally, a DSP reset may be performed when substantial signal degradation is detected based on the channel diagnostics information.Type: ApplicationFiled: April 8, 2020Publication date: July 23, 2020Inventors: Shih Cheng WANG, Seyedmohammadreza MOTAGHIANNEZAM, Matthew C. BASHAW
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Patent number: 10651930Abstract: A receiver applies a calibration method to compensate for skew between input channels. The receiver skew is estimated by observing the coefficients of an adaptive equalizer which adjusts the coefficients based on time-varying properties of the multi-channel input signal. The receiver skew is compensated by programming the phase of the sampling clocks for the different channels. Furthermore, during real-time operation of the receiver, channel diagnostics is performed to automatically estimate differential group delay and/or other channel characteristics based on the equalizer coefficients using a frequency averaging or polarization averaging approach. Framer information can furthermore be utilized to estimate differential group delay that is an integer multiple of the symbol rate. Additionally, a DSP reset may be performed when substantial signal degradation is detected based on the channel diagnostics information.Type: GrantFiled: April 17, 2019Date of Patent: May 12, 2020Assignee: INPHI CORPORATIONInventors: Shih Cheng Wang, Seyedmohammadreza Motaghiannezam, Matthew C. Bashaw
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Publication number: 20200092011Abstract: A timing recovery system generates a sampling clock to synchronize sampling of a receiver to a symbol rate of an incoming signal. The input signal is received over an optical communication channel. The receiver generates a timing matrix representing coefficients of a timing tone detected in the input signal. The timing tone representing frequency and phase of a symbol clock of the input signal and has a non-zero timing tone energy. The receiver computes a rotation control signal based on the timing matrix that represents an amount of accumulated phase shift in the input signal relative to the sampling clock. A numerically controlled oscillator is controlled to adjust at least one of the phase and frequency of the sampling clock based on the rotation control signal.Type: ApplicationFiled: November 25, 2019Publication date: March 19, 2020Inventors: Mario Rafael HUEDA, Mauro Marcelo BRUNI, Federico Nicolas PAREDES, Hugo Santiago CARRER, Diego Ernesto CRIVELLI, Oscar Ernesto AGAZZI, Norman L. SWENSON, Seyedmohammadreza MOTAGHIANNEZAM
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Patent number: 10530493Abstract: A timing recovery system generates a sampling clock to synchronize sampling of a receiver to a symbol rate of an incoming signal. The input signal is received over an optical communication channel. The receiver generates a timing matrix representing coefficients of a timing tone detected in the input signal. The timing tone representing frequency and phase of a symbol clock of the input signal and has a non-zero timing tone energy. The receiver computes a rotation control signal based on the timing matrix that represents an amount of accumulated phase shift in the input signal relative to the sampling clock. A numerically controlled oscillator is controlled to adjust at least one of the phase and frequency of the sampling clock based on the rotation control signal.Type: GrantFiled: December 6, 2018Date of Patent: January 7, 2020Assignee: INPHI CORPORATIONInventors: Mario Rafael Hueda, Mauro Marcelo Bruni, Federico Nicolas Paredes, Hugo Santiago Carrer, Diego Ernesto Crivelli, Oscar Ernesto Agazzi, Norman L. Swenson, Seyedmohammadreza Motaghiannezam
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Publication number: 20190245617Abstract: A receiver applies a calibration method to compensate for skew between input channels. The receiver skew is estimated by observing the coefficients of an adaptive equalizer which adjusts the coefficients based on time-varying properties of the multi-channel input signal. The receiver skew is compensated by programming the phase of the sampling clocks for the different channels. Furthermore, during real-time operation of the receiver, channel diagnostics is performed to automatically estimate differential group delay and/or other channel characteristics based on the equalizer coefficients using a frequency averaging or polarization averaging approach. Framer information can furthermore be utilized to estimate differential group delay that is an integer multiple of the symbol rate. Additionally, a DSP reset may be performed when substantial signal degradation is detected based on the channel diagnostics information.Type: ApplicationFiled: April 17, 2019Publication date: August 8, 2019Inventors: Shih Cheng WANG, Seyedmohammadreza MOTAGHIANNEZAM, Matthew C. BASHAW
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Patent number: 10305589Abstract: A receiver applies a calibration method to compensate for skew between input channels. The receiver skew is estimated by observing the coefficients of an adaptive equalizer which adjusts the coefficients based on time-varying properties of the multi-channel input signal. The receiver skew is compensated by programming the phase of the sampling clocks for the different channels. Furthermore, during real-time operation of the receiver, channel diagnostics is performed to automatically estimate differential group delay and/or other channel characteristics based on the equalizer coefficients using a frequency averaging or polarization averaging approach. Framer information can furthermore be utilized to estimate differential group delay that is an integer multiple of the symbol rate. Additionally, a DSP reset may be performed when substantial signal degradation is detected based on the channel diagnostics information.Type: GrantFiled: December 11, 2017Date of Patent: May 28, 2019Assignee: INPHI CORPORATIONInventors: Shih Cheng Wang, Seyedmohammadreza Motaghiannezam, Matthew C. Bashaw
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Publication number: 20190115984Abstract: A timing recovery system generates a sampling clock to synchronize sampling of a receiver to a symbol rate of an incoming signal. The input signal is received over an optical communication channel. The receiver generates a timing matrix representing coefficients of a timing tone detected in the input signal. The timing tone representing frequency and phase of a symbol clock of the input signal and has a non-zero timing tone energy. The receiver computes a rotation control signal based on the timing matrix that represents an amount of accumulated phase shift in the input signal relative to the sampling clock. A numerically controlled oscillator is controlled to adjust at least one of the phase and frequency of the sampling clock based on the rotation control signal.Type: ApplicationFiled: December 6, 2018Publication date: April 18, 2019Inventors: Mario Rafael HUEDA, Mauro Marcelo BRUNI, Federico Nicolas PAREDES, Hugo Santiago CARRER, Diego Ernesto CRIVELLI, Oscar Ernesto AGAZZI, Norman L. SWENSON, Seyedmohammadreza MOTAGHIANNEZAM
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Patent number: 10181908Abstract: A timing recovery system generates a sampling clock to synchronize sampling of a receiver to a symbol rate of an incoming signal. The input signal is received over an optical communication channel. The receiver generates a timing matrix representing coefficients of a timing tone detected in the input signal. The timing tone representing frequency and phase of a symbol clock of the input signal and has a non-zero timing tone energy. The receiver computes a rotation control signal based on the timing matrix that represents an amount of accumulated phase shift in the input signal relative to the sampling clock. A numerically controlled oscillator is controlled to adjust at least one of the phase and frequency of the sampling clock based on the rotation control signal.Type: GrantFiled: December 12, 2017Date of Patent: January 15, 2019Assignee: INPHI CORPORATIONInventors: Mario Rafael Hueda, Mauro Marcelo Bruni, Federico Nicolas Paredes, Hugo Santiago Carrer, Diego Ernesto Crivelli, Oscar Ernesto Agazzi, Norman L. Swenson, Seyedmohammadreza Motaghiannezam
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Publication number: 20180115369Abstract: A timing recovery system generates a sampling clock to synchronize sampling of a receiver to a symbol rate of an incoming signal. The input signal is received over an optical communication channel. The receiver generates a timing matrix representing coefficients of a timing tone detected in the input signal. The timing tone representing frequency and phase of a symbol clock of the input signal and has a non-zero timing tone energy. The receiver computes a rotation control signal based on the timing matrix that represents an amount of accumulated phase shift in the input signal relative to the sampling clock. A numerically controlled oscillator is controlled to adjust at least one of the phase and frequency of the sampling clock based on the rotation control signal.Type: ApplicationFiled: December 12, 2017Publication date: April 26, 2018Inventors: Mario Rafael HUEDA, Mauro Marcelo BRUNI, Federico Nicolas PAREDES, Hugo Santiago CARRER, Diego Ernesto CRIVELLI, Oscar Ernesto AGAZZI, Norman L. SWENSON, Seyedmohammadreza MOTAGHIANNEZAM
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Publication number: 20180102839Abstract: A receiver applies a calibration method to compensate for skew between input channels. The receiver skew is estimated by observing the coefficients of an adaptive equalizer which adjusts the coefficients based on time-varying properties of the multi-channel input signal. The receiver skew is compensated by programming the phase of the sampling clocks for the different channels. Furthermore, during real-time operation of the receiver, channel diagnostics is performed to automatically estimate differential group delay and/or other channel characteristics based on the equalizer coefficients using a frequency averaging or polarization averaging approach. Framer information can furthermore be utilized to estimate differential group delay that is an integer multiple of the symbol rate. Additionally, a DSP reset may be performed when substantial signal degradation is detected based on the channel diagnostics information.Type: ApplicationFiled: December 11, 2017Publication date: April 12, 2018Inventors: Shih Cheng WANG, Seyedmohammadreza MOTAGHIANNEZAM, Matthew C. BASHAW
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Patent number: 9876583Abstract: A timing recovery system generates a sampling clock to synchronize sampling of a receiver to a symbol rate of an incoming signal. The input signal is received over an optical communication channel. The receiver generates a timing matrix representing coefficients of a timing tone detected in the input signal. The timing tone representing frequency and phase of a symbol clock of the input signal and has a non-zero timing tone energy. The receiver computes a rotation control signal based on the timing matrix that represents an amount of accumulated phase shift in the input signal relative to the sampling clock. A numerically controlled oscillator is controlled to adjust at least one of the phase and frequency of the sampling clock based on the rotation control signal.Type: GrantFiled: June 14, 2017Date of Patent: January 23, 2018Assignee: INPHI CORPORATIONInventors: Mario Rafael Hueda, Mauro M. Bruni, Federico Nicolas Paredes, Hugo Santiago Carrer, Diego Ernesto Crivelli, Oscar Ernesto Agazzi, Norman L. Swenson, Seyedmohammadreza Motaghiannezam
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Patent number: 9871583Abstract: A receiver applies a calibration method to compensate for skew between input channels. The receiver skew is estimated by observing the coefficients of an adaptive equalizer which adjusts the coefficients based on time-varying properties of the multi-channel input signal. The receiver skew is compensated by programming the phase of the sampling clocks for the different channels. Furthermore, during real-time operation of the receiver, channel diagnostics is performed to automatically estimate differential group delay and/or other channel characteristics based on the equalizer coefficients using a frequency averaging or polarization averaging approach. Framer information can furthermore be utilized to estimate differential group delay that is an integer multiple of the symbol rate. Additionally, a DSP reset may be performed when substantial signal degradation is detected based on the channel diagnostics information.Type: GrantFiled: March 3, 2017Date of Patent: January 16, 2018Assignee: INPHI CORPORATIONInventors: Shih Cheng Wang, Seyedmohammadreza Motaghiannezam, Matthew C. Bashaw
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Publication number: 20170302385Abstract: A timing recovery system generates a sampling clock to synchronize sampling of a receiver to a symbol rate of an incoming signal. The input signal is received over an optical communication channel. The receiver generates a timing matrix representing coefficients of a timing tone detected in the input signal. The timing tone representing frequency and phase of a symbol clock of the input signal and has a non-zero timing tone energy. The receiver computes a rotation control signal based on the timing matrix that represents an amount of accumulated phase shift in the input signal relative to the sampling clock. A numerically controlled oscillator is controlled to adjust at least one of the phase and frequency of the sampling clock based on the rotation control signal.Type: ApplicationFiled: June 14, 2017Publication date: October 19, 2017Inventors: Mario Rafael HUEDA, Mauro M. BRUNI, Federico Nicolas PAREDES, Hugo Santiago CARRER, Diego Ernesto CRIVELLI, Oscar Ernesto AGAZZI, Norman L. SWENSON, Seyedmohammadreza MOTAGHIANNEZAM
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Patent number: 9712253Abstract: A timing recovery system generates a sampling clock to synchronize sampling of a receiver to a symbol rate of an incoming signal. The input signal is received over an optical communication channel. The receiver generates a timing matrix representing coefficients of a timing tone detected in the input signal. The timing tone representing frequency and phase of a symbol clock of the input signal and has a non-zero timing tone energy. The receiver computes a rotation control signal based on the timing matrix that represents an amount of accumulated phase shift in the input signal relative to the sampling clock. A numerically controlled oscillator is controlled to adjust at least one of the phase and frequency of the sampling clock based on the rotation control signal.Type: GrantFiled: September 29, 2015Date of Patent: July 18, 2017Assignee: INPHI CORPORATIONInventors: Mario Rafael Hueda, Mauro M. Bruni, Federico Nicolas Paredes, Hugo Santiago Carrer, Diego Ernesto Crivelli, Oscar Ernesto Agazzi, Norman L. Swenson, Seyedmohammadreza Motaghiannezam
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Patent number: 9621382Abstract: A receiver applies a calibration method to compensate for skew between input channels. The receiver skew is estimated by observing the coefficients of an adaptive equalizer which adjusts the coefficients based on time-varying properties of the multi-channel input signal. The receiver skew is compensated by programming the phase of the sampling clocks for the different channels. Furthermore, during real-time operation of the receiver, channel diagnostics is performed to automatically estimate differential group delay and/or other channel characteristics based on the equalizer coefficients using a frequency averaging or polarization averaging approach. Framer information can furthermore be utilized to estimate differential group delay that is an integer multiple of the symbol rate. Additionally, a DSP reset may be performed when substantial signal degradation is detected based on the channel diagnostics information.Type: GrantFiled: July 13, 2015Date of Patent: April 11, 2017Assignee: Clariphy Communications, Inc.Inventors: Shih Cheng Wang, Seyedmohammadreza Motaghiannezam, Matthew C. Bashaw
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Patent number: 9178625Abstract: A timing recovery system generates a sampling clock to synchronize sampling of a receiver to a symbol rate of an incoming signal. The input signal is received over an optical communication channel. The receiver generates a timing matrix representing coefficients of a timing tone detected in the input signal. The timing tone representing frequency and phase of a symbol clock of the input signal and has a non-zero timing tone energy. The receiver computes a rotation control signal based on the timing matrix that represents an amount of accumulated phase shift in the input signal relative to the sampling clock. A numerically controlled oscillator is controlled to adjust at least one of the phase and frequency of the sampling clock based on the rotation control signal.Type: GrantFiled: December 3, 2013Date of Patent: November 3, 2015Assignee: ClariPhy Communications Inc.Inventors: Mario Rafael Hueda, Mauro M. Bruni, Federico Nicolas Paredes, Hugo Santiago Carrer, Diego Ernesto Crivelli, Oscar Ernesto Agazzi, Norman L. Swenson, Seyedmohammadreza Motaghiannezam
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Patent number: 9094117Abstract: A receiver applies a calibration method to compensate for skew between input channels. The receiver skew is estimated by observing the coefficients of an adaptive equalizer which adjusts the coefficients based on time-varying properties of the multi-channel input signal. The receiver skew is compensated by programming the phase of the sampling clocks for the different channels. Furthermore, during real-time operation of the receiver, channel diagnostics is performed to automatically estimate differential group delay and/or other channel characteristics based on the equalizer coefficients using a frequency averaging or polarization averaging approach. Framer information can furthermore be utilized to estimate differential group delay that is an integer multiple of the symbol rate. Additionally, a DSP reset may be performed when substantial signal degradation is detected based on the channel diagnostics information.Type: GrantFiled: January 17, 2013Date of Patent: July 28, 2015Assignee: ClariPhy Communications, Inc.Inventors: Shih Cheng Wang, Seyedmohammadreza Motaghiannezam, Matthew C. Bashaw