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

IPC: H04L25/03 ,  H04L5/00

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.

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

IPC: H03K5/159 ,  H04L25/03 ,  H04L5/00

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.

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

IPC: H04L27/18 ,  H04L25/03 ,  H04L5/00

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.

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

IPC: H04L25/03 ,  H04L5/00

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.

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

IPC: H03K5/159 ,  H04L25/03 ,  H04L5/00

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.