Index modulation aided generalized space-time block coding: A unified MIMO framework

IF 7.5 2区计算机科学 Q1 TELECOMMUNICATIONS Digital Communications and Networks Pub Date : 2024-10-01 DOI:10.1016/j.dcan.2023.02.008

Zhiqin Wang , Hui Liu , Lixia Xiao , Liuke Li , Guochao Song , Tao Jiang

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Abstract

In this paper, Index Modulation (IM) aided Generalized Space-Time Block Coding (GSTBC) is proposed, which intrinsically exploits the benefits of IM concept, diversity gain and spatial multiplexing gain. Specifically, the information bits are partitioned into U groups, with each being modulated by IM symbols (i.e. Spatial Modulation (SM), Quadrature SM (QSM),etc). Next, the structure of GSTBC is invoked for each K IM symbol, and a total of μ = U/K GSTBC codes are transmitted via T time slots. A Block Expectation Propagation (B-EP) detector is designed for the proposed IM-GSTBC structure. Moreover, the theoretical Average Bit Error Probability (ABEP) is derived for our IM-GSTBC system, which is confirmed by the simulation results and helpful for performance evaluation. Simulation results show that our proposed IM-GSTBC system is capable of striking an efficient trade-off between spatial multiplexing gain, spatial diversity gain as well as implementation cost imposed for both small-scale and large-scale MIMO antenna configurations.

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索引调制辅助广义空时分组编码：一种统一的MIMO框架

本文提出了索引调制（IM）辅助广义时空块编码（GSTBC），它从本质上利用了 IM 概念、分集增益和空间复用增益的优点。具体来说，信息比特被分成 U 组，每组由 IM 符号（即空间调制 (SM)、正交 SM (QSM) 等）调制。然后，对每 K 个 IM 符号调用 GSTBC 结构，通过 T 个时隙传输总共 μ = U/K 个 GSTBC 编码。针对所提出的 IM-GSTBC 结构，设计了一个块期望传播（B-EP）检测器。此外，我们还推导出了 IM-GSTBC 系统的理论平均比特误差概率（ABEP），仿真结果证实了这一点，并有助于进行性能评估。仿真结果表明，我们提出的 IM-GSTBC 系统能够在空间复用增益、空间分集增益以及小规模和大规模 MIMO 天线配置的实施成本之间实现有效权衡。

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来源期刊

Digital Communications and Networks Computer Science-Hardware and Architecture

CiteScore

12.80

自引率

5.10%

发文量

915

审稿时长

30 weeks

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