Patent ID: 6381272
Filing Date: 2002-04-30
Classification: H03H

Abstract:
A multi-channel adaptive filter system for generating an estimated signal for each channel based on multi-channel signals x1(n)-xJ(n), the filter system comprising:a forward and backward prediction filter generator responsive to said multi-channel signals x1(n)-xJ(n) for generating a single forward prediction filter vector {right arrow over (&ohgr;)}pâˆ’1(n) and corresponding single forward error F(n) for all channels and a single backward prediction filter vector {right arrow over (&ngr;)}pâˆ’1(n) and corresponding single backward error B(n); an error generator for each channel responsive to errors in the estimated signal for multiplying said errors by 1-&mgr;, where &mgr; is an adaptation constant for generating error vectors for each channel; a pre-filter signal generator for each channel coupled to said forward and backward prediction filter generator and said error generator and responsive to said single forward prediction filter vector {right arrow over (&ohgr;)}pâˆ’1(n) and corresponding single forward error F(n) and said single backward prediction filter vector {right arrow over (&ngr;)}pâˆ’1(n) and corresponding single backward error and said error vectors for each channel for generating pre-filtering coefficients; and an adaptive filter output generator coupled to said pre-filter generator and said multi-channel signals x1(n)-xJ(n) for generating an estimate signal for each channel.