Patent ID: 6754253
Filing Date: 2004-06-22
Classification: H04B,H04L

Abstract:
A diversity method implemented by a CDMA receiver, said method comprising:receiving a combined received signal during first and second symbol periods, said combined received signal representing first and second transmit symbols encoded according to a space-time code and transmitted from first and second transmit antennas; selecting a first set of multipath echoes associated with said first symbol period and a second set of multipath echoes associated with said second symbol period; computing a first value based on said first set of said multipath echoes and a plurality of channel estimates corresponding to a first set of multipath propagation channels associated with said first antenna; computing a second value based on said second set of said multipath echoes and a plurality of channel estimates corresponding to said first set of multipath propagation channels associated with said first antenna; computing a third value based on said first set of said multipath echoes and a plurality of channel estimates corresponding to a second set of multipath propagation channels associated with said second antenna; computing a fourth value based on said second set of said multipath echoes and a plurality of channel estimates corresponding to said second set multipath propagation channels associated with said second antenna; thereafter, selectively combining said first, second, third and fourth values to generate estimates of said first and second transmit symbols.