Performance analysis for UCHT complex sequences in DS-CDMA downlink systems

被引：0
|
作者：
Xie, SL [1 ]
Rahardja, S [1 ]
Gu, ZH [1 ]
机构：
[1] Inst Infocomm Res, Singapore 119613, Singapore
来源：
VTC2004-FALL: 2004 IEEE 60TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-7: WIRELESS TECHNOLOGIES FOR GLOBAL SECURITY | 2004年
关键词：
D O I：
暂无
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
Performance analysis for orthogonal unified complex Hadamard transform (UCHT) spreading sequences in DS-CDMA downlinks is investigated in this paper. The coherent RAKE receiver is also adopted to reduce the effect of multipath fading. System performance is evaluated by means of signal-to-interference-plus-noise ratio (SINR) at the RAKE receiver. It is shown that the SINR of the system employing UCHT complex sequences is independent of the phase offsets between different paths, while the SINR of the system using Walsh-Hadamard (WH) sequences is related to the squared cosine of path phase offsets. As a result, the bit-error ratio (BER) performance of the DS-CDMA downlink system employing UCHT complex sequences is better than that of the system with WH sequences. Numerical simulations also demonstrate the benefits of the UCHT spreading sequences in the DS-CDMA downlinks with Rayleigh multipath fading.
引用
收藏
页码：724 / 728
页数：5
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