Performance evaluation of the path search process for the W-CDMA system
H. Hamada, M. Nakamura, Tokuro Kubo, M. Minowa, Y. Oishi · 2003
In this paper, we experimentally evaluated BER performances of a wideband CDMA (W-CDMA) system, focusing on a "path searcher", which measures the delay profile of the multipath Rayleigh fading channel and determine the positions of paths that is required in the RAKE receiver. We have proposed a selector-type code matched filter (MF) to decrease the circuit scale of the searcher. The searcher consists of two averaging units to obtain accurate delay profiles and a path detection unit to determine the position of paths. We estimated the required E/sub b//N/sub o/ for BER=10/sup -3/ as a function of averaging periods for delay profile and input bit precisions, and then obtained experimental optimum value of those parameters. We also evaluated the probability of path detection failure of the searcher.