FFE-AIDED CDR TO CALIBRATE PHASE OFFSET AND ENHANCE GAIN IN A BAUD RATE SAMPLING PHASE DETECTOR

Title:

FFE-AIDED CDR TO CALIBRATE PHASE OFFSET AND ENHANCE GAIN IN A BAUD RATE SAMPLING PHASE DETECTOR

Document Type and Number:

WIPO Patent Application WO/2017/143509

Kind Code:

A1

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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Inventors:

LU YUCHUN (CN)
WONG HENRY (CA)
TONIETTO DAVIDE (CA)

Application Number:

PCT/CN2016/074324

Publication Date:

August 31, 2017

Filing Date:

February 23, 2016

Export Citation:

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Assignee:

HUAWEI TECH CO LTD (CN)

International Classes:

H04L25/03

Foreign References:

US20120257652A1	2012-10-11
US8934594B1	2015-01-13
US20050135510A1	2005-06-23

Other References:

ABE J ET AL.: "Experimental Investigation of Adaptive Electrical Dispersion Compensation Using Eye Monitoring LSI in 43 Gbit/s RZ-DPSK signal", ECOC2008, ECOC, BRUSSELS, 21-25 SEP 2008, ECOC, BRUSSELS EXPO, BELGIUM, 21 September 2008 (2008-09-21)
NOGUCHI H ET AL.: "SOLID-STATE CIRCUITS CONFERENCE, 2008. ISSCC 2008. DIGEST OF TECHNICAL PAPERS. IEEE INTERNATIONAL", 3 February 2008, IEEE, article "A 40Gb/s CDR with Adaptive Decision-Point Control Using Eye-Opening-Monitor Feedback", pages: 228 - 609

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