Title :
Selection of Spreading Sequence Subsets for DS-CDMA Systems over Multipath Channels
Author :
Xie, S. ; Gu, Z. ; Rahardja, S. ; Wong, J.C. ; Xin, Y.
Author_Institution :
Inst. for Infocomm Res., Singapore
Abstract :
The performance of a direct-sequence code division multiple access (DS-CDMA) system is largely dependent on the correlation properties of the spreading sequences in use. Given a set of sequences, it is thus important to select an appropriate subset for optimal performance. In this paper, two new selection criteria of sequence subsets are given for synchronous and asynchronous DS-CDMA systems over multipath fading channels respectively when the multipath intensity profiles (MIP) are known. Simulation results show that subsets of sequences based on the proposed selection criteria can provide better bit-error rate (BER) performance than those based on the existing mean-square correlation selection criteria
Keywords :
code division multiple access; correlation theory; error statistics; fading channels; multipath channels; sequences; spread spectrum communication; BER performance; DS-CDMA system; MIP; bit-error rate; correlation property; direct-sequence code division multiple access; multipath fading channel; multipath intensity profile; spreading sequence subset; AWGN; Bit error rate; Fading; Frequency conversion; Frequency division multiaccess; Gold; Multiaccess communication; Multipath channels; Multiple access interference; Time division multiple access;
Conference_Titel :
Information, Communications and Signal Processing, 2005 Fifth International Conference on
Conference_Location :
Bangkok
Print_ISBN :
0-7803-9283-3
DOI :
10.1109/ICICS.2005.1689304
