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1.发明授权公开(公告)号：US10284397B2
公开(公告)日：2019-05-07
申请号：US15992519
申请日：2018-05-30
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yuchun Lu , Henry Wong , Davide Tonietto
Abstract: A system and method for Feed Forward Equalizer (FFE)-Aided Clock Data Recovery (CDR) to calibrate phase offset and enhance gain in baud rate sampling phase detector is provided. In an embodiment, a clock data recovery (CDR) apparatus includes an incremental feed forward equalizer (INC-FFE) in a CDR path and a calibration component in an equalization path, the calibration component connected to the INC-FFE, the calibration component configured to adjust FFE coefficients for the INC-FFE according to a phase code (PC) index in a PC index table and one of a signal-to-noise-ratio (SNR) and a bit error rate (BER) of a sampled signal, wherein the PC index table comprises adjustment values for the FFE coefficients, and wherein the PC index is linearly related to a sampling phase.
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Patent Agency Ranking
2.发明授权公开(公告)号：US10003481B2
公开(公告)日：2018-06-19
申请号：US15651715
申请日：2017-07-17
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yuchun Lu , Henry Wong , Davide Tonietto
CPC classification number: H04L25/03885 , H04L5/006
Abstract: A system and method for Feed Forward Equalizer (FFE)-Aided Clock Data Recovery (CDR) to calibrate phase offset and enhance gain in baud rate sampling phase detector is provided. In an embodiment, a clock data recovery (CDR) apparatus includes an incremental feed forward equalizer (INC-FFE) in a CDR path and a calibration component in an equalization path, the calibration component connected to the INC-FFE, the calibration component configured to adjust FFE coefficients for the INC-FFE according to a phase code (PC) index in a PC index table and one of a signal-to-noise-ratio (SNR) and a bit error rate (BER) of a sampled signal, wherein the PC index table comprises adjustment values for the FFE coefficients, and wherein the PC index is linearly related to a sampling phase.
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3.发明申请公开(公告)号：US20180278444A1
公开(公告)日：2018-09-27
申请号：US15992519
申请日：2018-05-30
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yuchun Lu , Henry Wong , Davide Tonietto
CPC classification number: H04L25/03885 , H04L5/006
Abstract: A system and method for Feed Forward Equalizer (FFE)-Aided Clock Data Recovery (CDR) to calibrate phase offset and enhance gain in baud rate sampling phase detector is provided. In an embodiment, a clock data recovery (CDR) apparatus includes an incremental feed forward equalizer (INC-FFE) in a CDR path and a calibration component in an equalization path, the calibration component connected to the INC-FFE, the calibration component configured to adjust FFE coefficients for the INC-FFE according to a phase code (PC) index in a PC index table and one of a signal-to-noise-ratio (SNR) and a bit error rate (BER) of a sampled signal, wherein the PC index table comprises adjustment values for the FFE coefficients, and wherein the PC index is linearly related to a sampling phase.
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4.发明授权公开(公告)号：US09712349B1
公开(公告)日：2017-07-18
申请号：US15071522
申请日：2016-03-16
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yuchun Lu , Henry Wong , Davide Tonietto
CPC classification number: H04L25/03885 , H04L5/006
Abstract: A system and method for Feed Forward. Equalizer (FFE)-Aided Clock Data Recovery (CDR) to calibrate phase offset and enhance gain in baud rate sampling phase detector is provided. In an embodiment, a clock data recovery (CDR) apparatus includes an incremental feed forward equalizer (INC-FFE) in a CDR path and a calibration component in an equalization path, the calibration component connected to the INC-FFE, the calibration component configured to adjust FFE coefficients for the INC-FFE according to a phase code (PC) index in a PC index table and one of a signal-to-noise-ratio (SNR) and a bit error rate (BER) of a sampled signal, wherein the PC index table comprises adjustment values for the FFE coefficients, and wherein the PC index is linearly related to a sampling phase.
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5.发明申请公开(公告)号：US20170317857A1
公开(公告)日：2017-11-02
申请号：US15651715
申请日：2017-07-17
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yuchun Lu , Henry Wong , Davide Tonietto
CPC classification number: H04L25/03885 , H04L5/006
Abstract: A system and method for Feed Forward Equalizer (FFE)-Aided Clock Data Recovery (CDR) to calibrate phase offset and enhance gain in baud rate sampling phase detector is provided. In an embodiment, a clock data recovery (CDR) apparatus includes an incremental feed forward equalizer (INC-FFE) in a CDR path and a calibration component in an equalization path, the calibration component connected to the INC-FFE, the calibration component configured to adjust FFE coefficients for the INC-FFE according to a phase code (PC) index in a PC index table and one of a signal-to-noise-ratio (SNR) and a bit error rate (BER) of a sampled signal, wherein the PC index table comprises adjustment values for the FFE coefficients, and wherein the PC index is linearly related to a sampling phase.
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公开(公告)号：US10523341B1
公开(公告)日：2019-12-31
申请号：US16289926
申请日：2019-03-01
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Petar Ivanov Krotnev , Davide Tonietto , Marc-Andre LaCroix
IPC: H04L5/16 , H04B15/00 , H04B17/345 , H04B1/40
Abstract: A method includes deactivating transmitters of a first plurality of transceivers that are associated with an endpoint to multi-channel communication fabric. A given transceiver of the first plurality of transceivers includes a receiver. The method includes controlling the given transceiver to cause the given transceiver to couple a reference source of the given transceiver to a first node of the receiver, measure a first value at a second node of the receiver, and determine a gain between the first node and the second node based on the measured first value. The method includes controlling the given receiver to cause the given receiver to isolate the reference source from the first node of the receiver; and measuring, by the given transceiver, a second value at the second node and determining, by the given transceiver, an intrinsic noise based on the measured second value. The method includes activating the deactivated transmitters; measuring, by the given transceiver, a third value at the second node and determining, by the given transceiver, a composite noise based on the measured third value; and determining, by the given transceiver, a crosstalk noise at the first node of the receiver based on the determined gain, the determined intrinsic noise and the determined composite noise.
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