Patent ID: 7133433
Filing Date: 2006-11-07
Classification: H04B,H04J

Abstract:
1. A high data rate spread spectrum receiver comprising: an RF front end for receiving a signal; a generator for generating a set of quasi orthogonal functions (QOF) and a set of Walsh codes; a despreader, which has a plurality of PN despreaders and a plurality of respective, parallel fast Hadamard transformers (FHT) each corresponding to one multipath, for despreading the received signal to form a plurality of despread signals corresponding to the set of quasi orthogonal functions and the set of Walsh codes; a multi-user detection block having a plurality of multi-user detectors for subtracting interference in the plurality of despread signals resulting from use of the quasi orthogonal functions and the set of Walsh codes to form plurality of corrected signals; and a combiner for combining the plurality of corrected signals.