Patent ID: 7003020
Filing Date: 2006-02-21
Classification: H04B

Abstract:
1. A path selection method comprising the steps of: a) producing a plurality of delay profiles from a plurality of propagation paths of a transmitted radio frequency signal, wherein said radio frequency signal is a spread spectrum signal containing a unique word and step (a) comprises despreading the unique word with a predetermined despread code to produce a sum of autocorrelations corresponding to said propagation paths; b) detecting a delay profile of highest peak amplitude from said delay profiles, this step comprising selecting one of said autocorrelations from said sum of autocorrelations corresponding to the detected delay profile of highest peak amplitude, and Nyquist-filtering the selected autocorrelation to produce a Nyquist response; c) removing the delay profile detected by step (b) from the delay profiles of step (a) by successively subtracting the Nyquist response of step (b) from the sum of autocorrelations produced by step (a); and d) repeating steps (b) and (c).