LMS ESTIMATION VIA STRUCTURAL DETECTION

We consider the LMS estimation of a channel that may be well approxima ted by an FIR model with only a few nonzero tap coefficients within a given delay horizon or tap length n. When the number of nonzero tap co efficients m is small compared with the delay horizon n, the performan ce of:the LMS estimator is greatly enhanced when this specific structu re is exploited. We propose a consistent algorithm that performs ident ification of nonzero taps only. The results are illustrated via a simu lation study.