Patent ID: 6765953
Filing Date: 2004-07-20
Classification: H04B

Abstract:
A parallel searcher for use in a wireless communications device, comprising:a pseudonoise code generator for generating at least one pseudonoise sequence having a predetermined chip period; a plurality of slices in said searcher for processing PN spread signals, each slice including: a delay unit for delaying said pseudonoise sequence by a predetermined chip period, a despreader comprising a complex rotator for operating on a data stream as a function of a pseudonoise sequence, which is a delayed pseudonoise sequence from a previous slice when the slice is not a first slice of said plurality, and at least one coherent accumulator for coherently accumulating an output of said despreader; and a non-coherent accumulator that accumulates the output of each slice non-coherently to produce a non-coherent sum for each slice; wherein an output from said pseudonoise generator is coupled to an input of the delay unit of a next slice, except when the current slice is the last slice of said plurality; and wherein each slice has an output from the delay unit coupled to an input of the delay unit of a next slice.