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1. (WO2018125437) ADAPTIVE CALIBRATION TECHNIQUE FOR CROSS TALK CANCELLATION

Pub. No.:    WO/2018/125437    International Application No.:    PCT/US2017/062677
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Wed Nov 22 00:59:59 CET 2017
IPC: H04L 25/08
H04L 25/03
H04B 3/32
Applicants: INTEL CORPORATION
Inventors: BANDI, Chenchu Punnarao Rao
SRIVASTAVA, Amit Kumar
Title: ADAPTIVE CALIBRATION TECHNIQUE FOR CROSS TALK CANCELLATION
Abstract:
Aspects of the embodiments are directed to calibrating a cross-talk cancellation module. A data eye response for a first data channel can be acquired, and the left-side and right-side maximum transition edges can be determined while adjacent data channels are silent. The adjacent data channels can be activated, first using an even mode waveform. A strobe can be positioned at the left-side maximum boundary in anticipation of a right-shift due to even mode waveform cross talk. A summer circuit can sum the waveform from the first data channel with cross-talk induced voltage pulse having an opposite polarity from the even mode waveforms on the aggressor channels. A left-side edge can be determined by incrementally adjusting gain and detector parameters. These parameters can be locked once a left-side transition edge is located. The process can be repeated for a right-side transition edge with odd-mode aggressor waveforms.