Multipath searcher with the hybrid CDMA interference canceller

Abstract

In this paper we consider the multipath searcher in a multiuser CDMA system. The conventional configuration where the searcher uses the received signal as its input is studied and a new configuration in which the searcher uses the hybrid interference canceller (HIC) output is proposed. Due to MAI reduction in the searcher's input signal, a much better performance is obtained in the new configuration. For a medium-loaded system, simulation results show that the new configuration increases the detection probability by about 8 - 40%, and the acquisition-based capacity by 260 - 360% when the targeted acquisition probability is set to 95%.