A Transmitter Model for Performance Improvement and Interference Mitigation of Multi-user STBC-CDMA System in Correlated MISO Channels
A Transmitter Model for Performance Improvement and Interference Mitigation of Multi-user STBC-CDMA System in Correlated MISO Channels
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DOI：
10.1109/ems.2009.91
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发表时间：
2009-11
期刊：
影响因子：
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通讯作者：
M. Rahmati;V. Vakili
中科院分区：
文献类型：
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作者：
M. Rahmati;V. Vakili
本文以多用户空时分组编码（STBC）码分多址（CDMA）系统为研究对象，通过仿真研究了多用户干扰沿着多输入单输出（MISO）信道空间相关性的影响。考虑了MISO信道的相关模型。仿真结果表明，空时码分多址系统的空间相关性降低了系统的性能。另一方面，仿真结果表明，由于多用户干扰的巨大退化。为了提高该系统的性能，本文提出了一种利用两个不同的预编码器的发射机模型。在该模型中使用了反相关预编码器和干扰消除预编码器。仿真结果表明，该模型可以取得令人满意的性能改善。
In this contribution, multi-user Space-Time Block Coding (STBC) Code Division Multiple Access (CDMA) system is simulated to investigate the effect of multi-user interference along with the spatial correlation of Multiple-Input Single-Output (MISO) channels. The correlative model is considered for MISO channel. Simulation results declare that spatial correlation degrades the performance of STBC CDMA system. On the other hand, simulations show a huge degradation due to multi-user interference. In order to improve the performance of this system, a transmitter model that utilizes two distinct precoders is proposed in this paper. An anti-correlation precoder and an interference cancellation precoder are used in this model. Simulation results illustrate that this model could achieve a satisfactory performance improvement.