Rf receiver with nlms channel estimator and method therefor

Abstract

An RF receiver () includes a channel estimator (). The channel estimator () includes a channel estimation filter (), error signal generator (), and normalized Least-Mean-Square (NLMS) filter-definition generator. The filter (), error generator () and NLMS filter-definition generator () function together as an adaptive estimator. An error signal () is formed with a received signal (). The filter () filters an estimated transmit signal () constructed from lower confidence decision data () and higher confidence known preamble data (). An adaptive filter definition () is formed in a feedback, loop which minimizes correlation between the estimated transmit signal () and the error signal (). A convergence signal () is modulated in synchronism with the changes between lower and higher confidence data in the estimated transmit signal ().