Performance of multiuser CDMA system with space-time block coding in MIMO Rayleigh fading channels

被引：0
作者：
XiangBin Yu
Tao Dong
GuangGuo Bi
机构：
[1] Nanjing University of Aeronautics and Astronautics,College of Information Science and Technology
[2] Sun Yat-sen University,School of Information Science and Technology
[3] Southeast University,National Mobile Communications Research Laboratory
来源：
Science in China Series F: Information Sciences | 2009年 / 52卷
关键词：
space-time block coding; code division multiple access (CDMA); full diversity; full rate; multiple input multiple output (MIMO);
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In this paper, by introducing orthogonal space-time coding scheme, the multiuser CDMA systems with different space time codes are given, and corresponding system performance is investigated over Rayleigh fading channel. A low-complexity multiuser receiver scheme is developed for space-time coded CDMA systems. The scheme can make full use of the complex orthogonality of space-time coding to simplify the high decoding complexity of the existing scheme. Compared to the existing scheme with exponential decoding complexity, it has linear decoding complexity. Based on the performance analysis and mathematical calculation, average bit error rate (BER) of the system is derived in detail, and tight closed-form approximation expressions of BER are attained. Simulation results on average BER are in agreement with the theory analysis. The results show that the proposed scheme can achieve almost the same performance as the existing scheme. Moreover, on the condition of same system throughput and concatenation of channel code, the given full-rate space-time coded CDMA system has lower BER than the full-diversity space-time coded CDMA systems.
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页码：2296 / 2307
页数：11
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