Differential space-time block code modulation for DS-CDMA systems

被引：1
|
作者：
Liu, JH [1 ]
Li, J [1 ]
Larsson, EG [1 ]
机构：
[1] Univ Florida, Dept Elect & Comp Engn, Gainesville, FL 32611 USA
来源：
EURASIP JOURNAL ON APPLIED SIGNAL PROCESSING | 2002年 / 2002卷 / 03期
关键词：
wireless communications; space-time coding; smart antennas; spread spectrum; DS-CDMA; Rake receiver;
D O I：
10.1155/S1110865702000598
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：
A differential space-time block code (DSTBC) modulation scheme is used to improve the performance of DS-CDMA systems in fast time-dispersive fading channels. The resulting scheme is referred to as the differential space-time block code modulation for DS-CDMA (DSTBC-CDMA) systems. The new modulation and demodulation schemes are especially studied for the down-link transmission of DS-CDMA systems. We present three demodulation schemes, referred to as the differential space-time block code Rake (D-Rake) receiver, differential space-time block code deterministic (D-Det) receiver, and differential space-time block code deterministic de-prefix (D-Det-DP) receiver, respectively. The D-Det receiver exploits the known information of the spreading sequences and their delayed paths deterministically besides the Rake type combination; consequently, it can outperform the D-Rake receiver, which employs the Rake type combination only. The D-Det-DP receiver avoids the effect of intersymbol interference and hence can offer better performance than the D-Det receiver.
引用
收藏
页码：289 / 296
页数：8
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