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1.发明公开公开(公告)号：US20240364451A1
公开(公告)日：2024-10-31
申请号：US18770877
申请日：2024-07-12
Applicant: NVIDIA Corporation
Inventor： Pervez Mirza Aziz , Vishnu Balan , Rohit Rathi
CPC classification number: H04L1/0045 , H04L1/203
Abstract: 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.
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公开(公告)号：US20230109793A1
公开(公告)日：2023-04-13
申请号：US17499300
申请日：2021-10-12
Applicant: NVIDIA Corporation
Inventor： Vishnu Balan , Mohammad Mobin , Akshay Shyam Pavagada Raghavendra , Pervez Mirza Aziz
Abstract: A receiving link device includes a receiver (RX) to receive a data signal from a transmitting link device, the receiver including an equalizer to detect RX tap values and a processing device coupled to the receiver, the processing device to perform operations including: programming the receiver with information related to target RX tap values that are associated RX pre-cursors or RX post-cursors; detecting, using the equalizer, that an RX pre-cursor value is greater or less than a target RX tap value; generating, based on the detecting, a tap message including an up or a down command to decrease or increase a corresponding transmitter (TX) pre-cursor value of the transmitting link device; and causing the tap message to be provided to a local transmitter to be transmitted to a remote receiver of the transmitting link device, which causes the transmitting link device to adjust the corresponding TX pre-cursor value.
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3.发明授权公开(公告)号：US11665029B2
公开(公告)日：2023-05-30
申请号：US17365620
申请日：2021-07-01
Applicant: NVIDIA Corporation
Inventor： Vishnu Balan , Pervez Mirza Aziz , Guo Hau Gau
CPC classification number: H04L25/062 , H03M1/0626 , H03M1/186 , H04L25/03006 , H04L25/025 , H04L25/0258 , H04L2025/0349
Abstract: A feed forward equalizer including a first set of filter taps having a first set of filter tap coefficients to be adapted and a second set of one or more filter taps having one or more filter tap coefficients to be constrained. The feed forward equalizer includes an adaptation component to determine a set of adapted filter tap coefficient values corresponding to the first set of filter tap coefficients and a constraint function component to determine a constrained filter tap coefficient value for the second set of the one or more filter taps having the one or more filter tap coefficients to be constrained using a constraint function based on at least a portion of the set of adapted filter tap coefficient values. The feed forward equalizer generates, based at least in part on the constrained filter tap coefficient value, an equalized signal including a set of estimated symbol values.
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4.发明授权公开(公告)号：US12267210B2
公开(公告)日：2025-04-01
申请号：US18112406
申请日：2023-02-21
Applicant: NVIDIA Corporation
Inventor： Pervez Mirza Aziz , Vishnu Balan , Rohit Rathi
IPC: H04L41/0823 , H03M13/35 , H04L1/00 , H04L1/20
Abstract: 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 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.
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5.发明公开公开(公告)号：US20240214134A1
公开(公告)日：2024-06-27
申请号：US18112406
申请日：2023-02-21
Applicant: NVIDIA Corporation
Inventor： Pervez Mirza Aziz , Vishnu Balan , Rohit Rathi
CPC classification number: H04L1/203 , H04L1/0045 , H04L1/0071
Abstract: 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.
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Patent Agency Ranking
公开(公告)号：US20230239132A1
公开(公告)日：2023-07-27
申请号：US18194355
申请日：2023-03-31
Applicant: NVIDIA Corporation
Inventor： Vishnu Balan , Mohammad Mobin , Akshay Shyam Pavagada Raghavendra , Pervez Mirza Aziz
CPC classification number: H04L7/0058 , H04L7/0079 , H04L25/03878 , H04L7/0091 , H04L25/03006 , H04L7/06 , H04L2025/03611
Abstract: An integrated circuit for a receiving link device includes a processing device to detect, using an equalizer of the receiving link device, that a receiver (RX) pre-cursor value is outside of a threshold value based on a target RX tap value. The processing device further generates, based on the detecting, a plurality of tap messages having a plurality of up or down commands to one of decrease or increase a corresponding transmitter (TX) pre-cursor value of a transmitting link device. The processing device further causes the plurality of tap messages to be provided to a local transmitter to be transmitted to the transmitting link device. The plurality of tap messages is to cause the transmitting link device to adjust the corresponding TX pre-cursor value.
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公开(公告)号：US11985220B2
公开(公告)日：2024-05-14
申请号：US18194355
申请日：2023-03-31
Applicant: NVIDIA Corporation
Inventor： Vishnu Balan , Mohammad Mobin , Akshay Shyam Pavagada Raghavendra , Pervez Mirza Aziz
CPC classification number: H04L7/0058 , H04L7/0079 , H04L7/0091 , H04L7/06 , H04L25/03006 , H04L25/03878 , H04L2025/03611
Abstract: An integrated circuit for a receiving link device includes a processing device to detect, using an equalizer of the receiving link device, that a receiver (RX) pre-cursor value is outside of a threshold value based on a target RX tap value. The processing device further generates, based on the detecting, a plurality of tap messages having a plurality of up or down commands to one of decrease or increase a corresponding transmitter (TX) pre-cursor value of a transmitting link device. The processing device further causes the plurality of tap messages to be provided to a local transmitter to be transmitted to the transmitting link device. The plurality of tap messages is to cause the transmitting link device to adjust the corresponding TX pre-cursor value.
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公开(公告)号：US11611458B1
公开(公告)日：2023-03-21
申请号：US17392178
申请日：2021-08-02
Applicant: NVIDIA Corporation
Inventor： Vishnu Balan , Viswanath Annampedu , Pervez Mirza Aziz
IPC: H04L25/03
Abstract: A receiver includes a decision feed forward equalization (DFFE) system coupled to a partial response (PR) system. The partial response system generates, based on a digital signal that includes pre-cursor intersymbol interference (ISI) and post-cursor ISI introduced by a communication channel, a detected signal including a set of detected symbol values. The detected signal is equalized to a partial response. The DFFE system includes a PR inverter to generate a set of estimated transmitted symbol values based on the set of detected symbol values and DFFE circuitry to cancel the pre-cursor ISI and the post-cursor ISI from the detected signal using the set of estimated transmitted symbols and a set of tap coefficients to obtain a compensated signal and a set of compensated symbol values.
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9.发明申请公开(公告)号：US20230006867A1
公开(公告)日：2023-01-05
申请号：US17365620
申请日：2021-07-01
Applicant: NVIDIA Corporation
Inventor： Vishnu Balan , Pervez Mirza Aziz , Guo Hau Gau
Abstract: A feed forward equalizer including a first set of filter taps having a first set of filter tap coefficients to be adapted and a second set of one or more filter taps having one or more filter tap coefficients to be constrained. The feed forward equalizer includes an adaptation component to determine a set of adapted filter tap coefficient values corresponding to the first set of filter tap coefficients and a constraint function component to determine a constrained filter tap coefficient value for the second set of the one or more filter taps having the one or more filter tap coefficients to be constrained using a constraint function based on at least a portion of the set of adapted filter tap coefficient values. The feed forward equalizer generates, based at least in part on the constrained filter tap coefficient value, an equalized signal including a set of estimated symbol values.
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公开(公告)号：US11646863B2
公开(公告)日：2023-05-09
申请号：US17499300
申请日：2021-10-12
Applicant: NVIDIA Corporation
Inventor： Vishnu Balan , Mohammad Mobin , Akshay Shyam Pavagada Raghavendra , Pervez Mirza Aziz
CPC classification number: H04L7/0058 , H04L7/0079 , H04L7/0091 , H04L7/06 , H04L25/03006 , H04L25/03878 , H04L2025/03611
Abstract: A receiving link device includes a receiver (RX) to receive a data signal from a transmitting link device, the receiver including an equalizer to detect RX tap values and a processing device coupled to the receiver, the processing device to perform operations including: programming the receiver with information related to target RX tap values that are associated RX pre-cursors or RX post-cursors; detecting, using the equalizer, that an RX pre-cursor value is greater or less than a target RX tap value; generating, based on the detecting, a tap message including an up or a down command to decrease or increase a corresponding transmitter (TX) pre-cursor value of the transmitting link device; and causing the tap message to be provided to a local transmitter to be transmitted to a remote receiver of the transmitting link device, which causes the transmitting link device to adjust the corresponding TX pre-cursor value.
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