Title :
Performance evaluation of the path search process for the W-CDMA system
Author :
Hamada, Hajime ; Nakamura, Michiharu ; Kubo, Tokuro ; Minowa, Morihiko ; Oishi, Yasuyuki
Author_Institution :
Fujitsu Lab. Ltd., Yokosuka, Japan
Abstract :
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 Eb/No for BER=10-3 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
Keywords :
Rayleigh channels; broadband networks; code division multiple access; error statistics; filtering theory; land mobile radio; matched filters; multipath channels; multiuser channels; radio links; radio networks; radio receivers; search problems; signal detection; BER; BER performance; RAKE receiver; W-CDMA system; averaging units; computer simulations; delay profile; hardware experiments; input bit precision; mobile communication system; multipath Rayleigh fading channel; path detection failure probability; path detection unit; path position; path search process; path searcher; performance evaluation; radio link parameters; selector-type code matched filter; simulation results; Bit error rate; Circuits; Delay estimation; Fading; Matched filters; Multiaccess communication; Multipath channels; Performance evaluation; Position measurement; Wideband;
Conference_Titel :
Vehicular Technology Conference, 1999 IEEE 49th
Conference_Location :
Houston, TX
Print_ISBN :
0-7803-5565-2
DOI :
10.1109/VETEC.1999.780494
