Patent ID: 6549151
Filing Date: 2003-04-15
Classification: G01S,H03M

Abstract:
A method for acquiring a coded signal having a bandwidth, comprising:(a) providing a received coded signal having a bandwidth; (b) decomposing the received coded signal into a plurality of subband signals, each of the subband signals having an associated bandwidth less than the coded signal bandwidth; (c) forming a plurality of subband correlation signals corresponding to the plurality of subband signals; (d) combining the plurality of subband correlation signals to form a correlation function corresponding to the received coded signal, the correlation function defining a plurality of peaks; (e) determining, based on the correlation function, an estimated transmit time and frequency of at least part of the coded signal; and (f) determining, based on the estimated transmit time and frequency, a replicated code corresponding to the at least part of the received coded signal.