基于NSFC-OFDM的非协作式虚拟MIMO

发布时间：2018-06-13 07:08

本文选题：虚拟多输入输出 + 非协作　；参考：《重庆邮电大学学报(自然科学版)》2017年03期

【摘要】：针对多用户配对虚拟MIMO(multiple input multiple output)安全性差,对信道估计器依赖性强的问题,提出一种基于非相干空频码(non-coherent space frequency code,NSFC)和正交频分复用(orthogonal frequency division multiplexing,OFDM)的非协作式虚拟MIMO。在分析NSFC成对错误概率的基础上,给出能满足全分集阶数和最大编码增益的编码准则。为了获得平行子信道传输效果,利用信道循环矩阵奇异值分解(singular value decomposition,SVD)后得到的酉矩阵分别进行预编码和预解码。基于最优NSFC和OFDM预编解码,提出一种新颖的虚拟MIMO策略。该虚拟MIMO在收发两端均无需信道瞬时信息,以非协作方式在单天线内模拟多天线收发效果。理论和仿真分析结果表明,虚拟MIMO系统能有效逼近实际理想MIMO的系统容量和误比特率性能,显著降低了虚拟MIMO系统的检测门限。
[Abstract]:In view of the poor security of multi user pairing virtual MIMO (multiple input multiple output) and the strong dependence on channel estimator, a non cooperative virtual reality based on non coherent space frequency code (non-coherent space frequency code, NSFC) and orthogonal frequency division multiplexing (orthogonal frequency) is proposed. On the basis of FC pair error probability, the coding criteria that can satisfy the full diversity order and maximum coding gain are given. In order to obtain the parallel subchannel transmission effect, the unitary matrix of the channel cyclic matrix singular value decomposition (singular value decomposition, SVD) is precoded and predeciphed respectively. Based on the optimal NSFC and OFDM precoding. A novel virtual MIMO strategy is proposed. The virtual MIMO does not need the instantaneous channel information at both ends of the transceiver, and simulate the effectiveness of multiple antennas in a single antenna in a non cooperative way. The theoretical and simulation results show that the virtual MIMO system can effectively approximate the system capacity and bit error rate performance of the actual ideal MIMO and significantly reduce the virtual reality. Detection threshold of the quasi MIMO system.
【作者单位】：南华大学电气工程学院;湖南大学电气与信息工程学院;
【基金】：中央高校基本科研项目(2014-004) 国家自然科学基金(61172089) 湖南省教育厅重点项目(16A181) 湖南省科技计划项目(2014WK3001) 衡阳市科技计划发展项目(2015KG48)~~
【分类号】：TN919.3

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