Patent ID: 8671128
Filing Date: 2014-03-11
Classification: H03H,H04B

Abstract:
1. A system for filtering a communication channel, and comprising: a differencer for differencing a pair of signal inputs and outputting a difference signal corresponding to the difference there between; a pair of adaptive finite impulse response filters (FIR) each having a delay line input and an error signal input and an output and the delay line input of a first of the pair of FIR coupled to the communication channel and the outputs of the pair of FIR coupled to the pair of signal inputs of the difference; a statistical sequence estimator with an input coupled to the differencer to alter the difference signal based on statistics therefore and to output an altered difference signal which includes both altered bits or symbols together with associated confidence or likelihood values; and a blender with an inputs coupled to the differencer and the statistical sequence estimator and the blender responsive to the confidence or likelihood values in the altered difference signal to vary both a blend of different error signal sources forming a resultant error signal coupled to the error signal inputs of the pair of adaptive FIR as well as the blend of different input signal sources forming a resultant input signal coupled to the delay line input of a second of the pair of FIR, to stabilize the adaptive filtering performed by the pair of FIR.