公开(公告)号：US20240214134A1

公开(公告)日：2024-06-27

申请号：US18112406

申请日：2023-02-21

申请人： NVIDIA Corporation

发明人： Pervez Mirza Aziz ,  Vishnu Balan ,  Rohit Rathi

IPC分类号： H04L1/20 ,  H04L1/00

CPC分类号： H04L1/203 ,  H04L1/0045 ,  H04L1/0071

摘要： Technologies for optimizing post-FEC bit error rate performance of a Forward Error Correction (FEC) system are described. A controller is coupled to an FEC circuit and a receiver circuit. The controller receives FEC symbol error data from the receiver circuit and determines, using the FEC symbol error data, a post-FEC correlated performance metric indicative of an estimated post-FEC BER of the FEC circuit. The controller adjusts, based on the post-FEC correlated performance metric, at least one of a FEC parameter of the FEC circuit or a link parameter of the receiver circuit to decrease the estimated post-FEC BER. This improves the post-FEC BER performance of the FEC circuit.

公开(公告)号：US20240364451A1

公开(公告)日：2024-10-31

申请号：US18770877

申请日：2024-07-12

申请人： NVIDIA Corporation

发明人： Pervez Mirza Aziz ,  Vishnu Balan ,  Rohit Rathi

IPC分类号： H04L1/00 ,  H04L1/20

CPC分类号： H04L1/0045 ,  H04L1/203

摘要： Technologies for optimizing post-FEC bit error rate performance of a Forward Error Correction (FEC) system are described. A controller is coupled to an FEC circuit and a receiver circuit. The controller receives FEC symbol error data from at least the receiver circuit or the FEC circuit and determines, using the FEC symbol error data, a post-FEC correlated performance metric indicative of an estimated post-FEC BER of the FEC circuit. The controller adjusts, based on the post-FEC correlated performance metric, at least one of a FEC parameter of the FEC circuit or a link parameter of the receiver circuit to decrease the estimated post-FEC BER. This improves the post-FEC BER performance of the FEC circuit.

公开(公告)号：US11018909B2

公开(公告)日：2021-05-25

申请号：US16993180

申请日：2020-08-13

申请人： NVIDIA CORPORATION

发明人： Vishnu Balan ,  Mohammed Mobin ,  Rohit Rathi ,  Dai Dai

IPC分类号： H04L27/01

摘要： A receiver receives communications over a communication channel, which may distort an incoming communication signal. In order to counter this distortion, the frequency response of the receiver is manipulated by adjusting several frequency response parameters. Each frequency response parameter controls at least a portion of the frequency response of the receiver. The optimal values for the frequency response parameters are determined by modifying an initial set of values for the frequency response parameters through one or more of stochastic hill climbing operations until a performance metric associated with the receiver reaches a local maximum. The modified values are displaced through one or more mutation operations. The stochastic hill climbing operations may subsequently be performed on the mutated values to generate the final values for the frequency response parameters.

公开(公告)号：US10749720B1

公开(公告)日：2020-08-18

申请号：US16419996

申请日：2019-05-22

申请人： NVIDIA CORPORATION

发明人： Vishnu Balan ,  Mohammad Mobin ,  Rohit Rathi ,  Dai Dai

IPC分类号： H04L27/01

摘要： A receiver receives communications over a communication channel, which may distort an incoming communication signal. In order to counter this distortion, the frequency response of the receiver is manipulated by adjusting several frequency response parameters. Each frequency response parameter controls at least a portion of the frequency response of the receiver. The optimal values for the frequency response parameters are determined by modifying an initial set of values for the frequency response parameters through one or more of stochastic hill climbing operations until a performance metric associated with the receiver reaches a local maximum. The modified values are displaced through one or more mutation operations. The stochastic hill climbing operations may subsequently be performed on the mutated values to generate the final values for the frequency response parameters.

公开(公告)号：US12034576B2

公开(公告)日：2024-07-09

申请号：US17528093

申请日：2021-11-16

申请人： NVIDIA CORPORATION

发明人： Vishnu Balan ,  Mohammad Mobin ,  Dai Dai ,  Raanan Ivry ,  Rohit Rathi

IPC分类号： H04L27/01

CPC分类号： H04L27/01

摘要： A receiver receives communications over a communication channel, which may distort an incoming communication signal. In order to counter this distortion, the frequency response of the receiver is manipulated by adjusting several parameters. Each parameter controls at least a portion of the frequency response of the receiver. The optimal values for the parameters are determined by modifying an initial set of values for the parameters through one or more stochastic hill climbing operations until a performance metric associated with the receiver reaches a local optimum. The modified values are displaced through one or more mutation operations. The stochastic hill climbing operations may subsequently be performed on the mutated values to generate the final values for the parameters.

公开(公告)号：US20200374162A1

公开(公告)日：2020-11-26

申请号：US16993180

申请日：2020-08-13

申请人： NVIDIA CORPORATION

发明人： Vishnu Balan ,  Mohammed Mobin ,  Rohit Rathi ,  Dai Dai

IPC分类号： H04L27/01

摘要： A receiver receives communications over a communication channel, which may distort an incoming communication signal. In order to counter this distortion, the frequency response of the receiver is manipulated by adjusting several frequency response parameters. Each frequency response parameter controls at least a portion of the frequency response of the receiver. The optimal values for the frequency response parameters are determined by modifying an initial set of values for the frequency response parameters through one or more of stochastic hill climbing operations until a performance metric associated with the receiver reaches a local maximum. The modified values are displaced through one or more mutation operations. The stochastic hill climbing operations may subsequently be performed on the mutated values to generate the final values for the frequency response parameters.

公开(公告)号：US11159304B2

公开(公告)日：2021-10-26

申请号：US16409686

申请日：2019-05-10

申请人： NVIDIA CORPORATION

发明人： Pervez Mirza Aziz ,  Rohit Rathi ,  Vishnu Balan

IPC分类号： H04L7/033 ,  H04L25/03 ,  H04L25/02

摘要： A clock data recovery (CDR) mechanism qualifies symbols received from the data detector prior to using those symbols to compute a timing gradient. The disclosed CDR mechanism analyzes one or more recently received symbols to determine whether the current symbol should be used in computing the time gradient. When configured with a Mueller-Muller phase detector, the timing gradient for the received signal is set to zero if the current symbol is a −2 or a +2 and the previous symbol is non-zero. Otherwise, the Mueller-Muller timing gradient is evaluated in the traditional manner. When configured with a minimum mean-squared error phase detector, the timing gradient for the received signal is set to zero if the previous symbol is non-zero. Otherwise, the minimum mean-squared error timing gradient is evaluated in the traditional manner.

公开(公告)号：US11381431B2

公开(公告)日：2022-07-05

申请号：US17326032

申请日：2021-05-20

申请人： NVIDIA CORPORATION

发明人： Vishnu Balan ,  Mohammad Mobin ,  Dai Dai ,  Raanan Ivry ,  Rohit Rathi

IPC分类号： H04L27/01

摘要： A receiver receives communications over a communication channel, which may distort an incoming communication signal. In order to counter this distortion, the frequency response of the receiver is manipulated by adjusting several frequency response parameters. Each frequency response parameter controls at least a portion of the frequency response of the receiver. The optimal values for the frequency response parameters are determined by modifying an initial set of values for the frequency response parameters through one or more of stochastic hill climbing operations until a performance metric associated with the receiver reaches a local maximum. The modified values are displaced through one or more mutation operations. The stochastic hill climbing operations may subsequently be performed on the mutated values to generate the final values for the frequency response parameters.