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arXiv 2007.14027eess.SP
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非平稳大规模多输入多输出信道模型下空间调制系统的BER性能

BER Performance of Spatial Modulation Systems Under a Non-Stationary Massive MIMO Channel Model

Yu Fu, Cheng-Xiang Wang, Xuming Fang, Li Yan, Stephen McLaughlin

摘要:

在基于非平稳Kronecker的大规模多输入多输出(MIMO)信道模型下,对多用户(MU)环境下空间调制(SM)系统的误比特率(BER)性能进行了理论分析和仿真研究。针对不同的系统设置,本文考虑了同时使用时分多址接入(TDMA)方案和基于块对角化(BD)的预编码方案的大规模多输入多输出SM系统。它们的性能进行了比较,垂直贝尔实验室分层空时(V-BLAST)架构为基础的系统和传统的信道反演系统。由于子信道之间的相关性较低,因此较高的簇演化因子可以使SM系统具有更好的BER性能。与BD-SM系统相比,使用TDMA方案的SM系统获得了更好的BER性能,但系统总数据速率要低得多。BD-MU-SM系统在所有考虑的系统中实现了数据速率和BER性能之间的最佳折衷。当与V-BLAST系统和信道反转系统相比时,SM方法为MU大规模多输入多输出系统提供了性能优势。

英文摘要:

In this paper, the bit error rate (BER) performance of spatial modulation (SM) systems is investigated both theoretically and by simulation in a non-stationary Kronecker-based massive multiple-input-multiple-output (MIMO) channel model in multi-user (MU) scenarios. Massive MIMO SM systems are considered in this paper using both a time-division multiple access (TDMA) scheme and a block diagonalization (BD) based precoding scheme, for different system settings. Their performance is compared with a vertical Bell labs layered space-time (V-BLAST) architecture based system and a conventional channel inversion system. It is observed that a higher cluster evolution factor can result in better BER performance of SM systems due to the low correlation among sub-channels. Compared with the BD-SM system, the SM system using the TDMA scheme obtains a better BER performance but with a much lower total system data rate. The BD-MU-SM system achieves the best trade-off between the data rate and the BER performance among all of the systems considered. When compared with the V-BLAST system and the channel inversion system, SM approaches offer advantages in performance for MU massive MIMO systems.

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