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频率选择性衰落CDMA系统中空时分组编码技术的研究

Study of Space-Time Block Code Technology in Frequency Selective Fading CDMA System
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摘要 发送分集技术给系统带来发送分集增益。首先探讨频率选择性衰落信道下采用频域均衡技术的空时分组编码技术(STBC-FE),然后结合用户多址问题将传统的发送分集技术从时分复用(TD-MA)扩展到码分复用(CDMA)系统。与传统的采用SISO(单输入单输出)天线结构的CDMA系统相比,单用户情况两者性能接近,6用户情况下STBC-FE算法优于SISO系统约1.5 dB。此外算法性能受用户数的影响不明显。 Transmit diversity technologies bring up diversity gain. This paper first discusses the combination of frequency-domain equalization with space-time block coding（STBC-FE） with two antennas at the transmitter in frequency selective fading channel. Then under the conditions of multiple access, it extends the conventional transmit diversity technology from TDMA to CDMA system. Compared with the SISO-scheme CDMA system, the one with two transmit antennas has almost the same performance in the case of single user and 1.5 dB better performance in the case of six users. Besides, the scheme is insensitive to user number.
作者 曹卫锋
机构地区 中国网络通信集团江苏省分公司
出处 《南京邮电大学学报（自然科学版）》 EI 2006年第4期30-33,39,共5页 Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition
关键词 频率选择性衰落 空时分组编码 频域均衡 CDMA系统 Frequency selective fading Space-time block code Frequency-domain equalization CDMA system
分类号 TN911.7 [电子电信—通信与信息系统]
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参考文献11

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二级参考文献10

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共引文献2

南京邮电大学学报（自然科学版）
2006年 第4期

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