Invention Application
- Patent Title: FFE-Aided CDR to Calibrate Phase Offset and Enhance Gain In Baud Rate Sampling Phase Detector
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Application No.: US15651715Application Date: 2017-07-17
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Publication No.: US20170317857A1Publication Date: 2017-11-02
- Inventor: Yuchun Lu , Henry Wong , Davide Tonietto
- Applicant: Huawei Technologies Co., Ltd.
- Main IPC: H04L25/03
- IPC: 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.
Public/Granted literature
- US10003481B2 FFE-aided CDR to calibrate phase offset and enhance gain in baud rate sampling phase detector Public/Granted day:2018-06-19
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