Patent ID: 6081566
Filing Date: 2000-06-27
Classification: H04B,H04L,H04W

Abstract:
A method for reducing the effects of signal fading, time dispersion, and interference in a radio communications system, comprising the steps of:(a) receiving a radio signal on at least one antenna element representing a transmitted symbol sequence;(b) processing said radio signal to produce received signal samples for said at least one antenna;(c) estimating a channel tap for said at least one antenna to a produce a channel tap estimate;(d) estimating scalar impairment correlation properties among the received signal samples to produce an estimate of scalar impairment correlation properties;(e) forming scalar branch metrics in a scalar branch metric processor using said received signal samples, said channel tap estimate, and said scalar estimate of impairment correlation properties; and(f) employing said scalar branch metrics in a sequence estimation algorithm to estimate said transmitted symbol sequence.