编码收发空间调制系统的接收端联合优化算法

doi:10.19665/j.issn1001-2400.2020.06.016

摘要/Abstract

摘要：

为实现通信系统频谱效率和能量效率的折中、误码性能和计算复杂度的折中,设计了基于收发两端天线选择的编码空间调制方案,并在接收端设计了一种联合检测、解映射的分层优化算法,利用天线及信号的备选集来降低计算复杂度,且参数可调。信道编码则采用分组马尔可夫叠加传输编码,根据频谱利用率需求灵活编码,预测下界。分析了计算复杂度并进行了蒙特卡罗仿真,将结果与最优算法相比表明,提出的联合优化算法在误比特率为10^-5、备选集大小L为 6、L' 为 4时,系统有约0.5 dB的性能损失,但计算复杂度却大幅降低。

关键词: 空间调制, 多进多出系统, 信道编码, 软输入软输出, 解映射

Abstract:

In order to make the trade-off between spectral efficiency and energy efficiency and the trade-off between bit error rate performance and computational complexity, a coded transceive spatial modulation system is designed. In addition, we propose a layered suboptimal joint optimization algorithm, which can reduce the complexity of both the detection and demapping algorithm. The candidate set of antennas and signals is used to reduce computational complexity with the parameters adjustable. We use the BMST channel coding scheme, which can be easily designed according to the spectral efficiency requirement and can predict the lower bound performance. The computational complexity is analyzed and the Monte Carlo simulation is performed, with the results showing that, at the bit error rate (BER) of 10^-5, the candidate set L = 6, L' = 4, the system has about 0.5dB performance loss compared with the optimal algorithm. However, the computational complexity can be greatly reduced.

Key words: spatial modulation, multiple input multiple output systems, channel coding, soft in soft out, demapping

中图分类号:

TN911.3

王磊军,陈荣军,赵慧民. 编码收发空间调制系统的接收端联合优化算法[J]. 西安电子科技大学学报, 2020, 47(6): 106-112.

WANG Leijun,CHEN Rongjun,ZHAO Huimin. Receiver joint optimization algorithm for the coded transceiver spatial modulation[J]. Journal of Xidian University, 2020, 47(6): 106-112.

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算法类型	检测所需实数乘	解映射一次迭代所需实数乘
最优算法	8 704	16 384
联合优化算法(L = L' = 2)	3 448	4 864
联合优化算法(L = 6,L' = 4)	6 032	9 728