Performance evaluation of DS-CDMA systems on multipath propagation channels with multilevel spreading sequences and Rake receivers

被引：12
|
作者：
Mazzini, G [1 ]
Tralli, V [1 ]
机构：
[1] Univ Bologna, CNR, CSITE, I-40136 Bologna, Italy
来源：
IEEE TRANSACTIONS ON COMMUNICATIONS | 1998年 / 46卷 / 02期
关键词：
CDMA systems; multipath channels; RAKE receivers; spreading sequences;
D O I：
10.1109/26.659483
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Performance of small-cell wireless direct sequence code-division multiple access (DS-CDMA) systems with multilevel spreading sequences is investigated. An analytical methodology to evaluate both outage probability and mean bit error probability is presented, and its results are compared to those obtained with a semianalytical Monte Carlo based approach. Multipath propagation, the exact correlation properties of spreading codes, and both the simple correlator and Rake receivers are taken into account in the analysis, which is oriented to asynchronous and synchronous environments. The spreading sequences investigated include the recently introduced multilevel sequences with complex isomorphic mapping, as well as some well-known two-level sequences. The numerical results show the impact of multilevel sequences on system performance, the improvements found in the absence of multiple access interferences by using them rather than binary sequences, and the agreement between analytical and semianalytical evaluation.
引用
收藏
页码：244 / 257
页数：14
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