Patent ID: 6961390
Filing Date: 2005-11-01
Classification: H04L

Abstract:
1. A non-causal channel equalization communication system, the system comprising: a multi-threshold decision circuit having an input to accept a non-return to zero (NRZ) data stream, an input to accept threshold values, and outputs to provide bit estimates responsive to a plurality of voltage threshold levels; a non-causal circuit having inputs to accept bit estimates from the multi-threshold decision circuit, the non-causal circuit comparing a current bit estimate to bit value decisions made across a plurality of clock cycles, the non-causal circuit having an output to supply a bit value for the current bit estimate determined in response to the non-causal bit value comparisons; a threshold circuit having an input to accept bit values from the non-causal circuit, an input to accept the NRZ data stream, and outputs to supply threshold values to the multi-threshold circuit that are adjusted in response to asymmetric noise in the NRZ data stream; and, wherein the non-causal circuit includes: