Patent ID: 9094117
Filing Date: 2015-07-28
Classification: H04B,H04J,H04L,H04N

Abstract:
1. A system for generating channel diagnostics information in an optical communication system, comprising: a digital signal processor including an adaptive equalizer to equalize a digital signal vector, the adaptive equalizer to adaptively update equalizer coefficients based on characteristics of the digital signal vector and to generate an equalized signal vector; a demodulator to demodulate the equalized signal vector to generate a demodulated signal; a decoder to decode the demodulated signal to generate a decoded signal; a framer to format the decoded signal for interfacing to a host interface, the framer to detect equalizer-induced differential group delay in the decoded signal introduced by the adaptive equalizer; a channel diagnostics block to obtain the equalizer coefficients of the adaptive equalizer to determine the equalizer-induced differential group delay based on a signal from the framer, and to determine a compensated differential group delay in the digital signal vector based on the coefficients and the equalizer-induced differential group delay.