Patent ID: 6665334
Filing Date: 2003-12-16
Classification: H04B

Abstract:
A reception method in a system employing a code division multiple access method, comprising the steps of:receiving a transmission comprising a desired signal and a plurality of interfering signals, which signals are each multiplied by a code of a known plurality codes; digitizing the received transmission; estimating a number of interfering signals; estimating the codes used by the interfering signals; canceling the interfering signals from the desired signals; detecting the desired signal after the interference cancellation; and further characterized in that the number of interfering signals and the codes used by them are estimated by correlating a received transmission by a plurality of matched filters (306) with the codes of a known code set, the results obtained are averaged over a predetermined time window, the averaged outputs are compared with a predetermined threshold value, and the codes whose power exceeds a predetermined threshold value are selected.