A Simplified Single Correlator Rake Receiver for CDMA Communications

Date Added: Jun 2009
Format: PDF

This paper presents a single correlator RAKE receiver for direct sequence code Division Multiple Access (DS-CDMA) systems. In conventional RAKE receivers, multiple correlators are used to despread the multipath signals and then to align and combine those signals in a later stage before making a bit decision. The simplified receiver structure presented here uses a single correlator and single code sequence generator to recover the multipaths. Modified Walsh-Hadamard codes are used here for data spreading that provides better uncorrelation properties for the multipath signals.