Dual-mode spatial index modulation for MIMO-OWC

被引：4
|
作者：
Zhong, Xin [1 ]
Chen, Chen [1 ]
Zhao, Yinan [1 ]
Liu, Min [1 ]
He, Cuiwei [2 ]
Haas, Harald [3 ,4 ]
机构：
[1] Chongqing Univ, Sch Microelect & Commun Engn, Chongqing 400044, Peoples R China
[2] Japan Adv Inst Sci & Technol, Sch Informat Sci, Ishikawa 9231211, Japan
[3] Univ Strathclyde, Technol Innovat Ctr, Glasgow G1 1RD, Scotland
[4] Univ Strathclyde, Dept Elect & Elect Engn, Glasgow G1 1RD, Scotland
来源：
OPTICS LETTERS | 2024年 / 49卷 / 02期
基金：
中国国家自然科学基金; 英国工程与自然科学研究理事会;
关键词：
resources; low-cost front -ends; electromagnetic interference; VISIBLE-LIGHT COMMUNICATION; OPTICAL WIRELESS COMMUNICATIONS;
D O I：
10.1364/OL.509658
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this Letter, we propose and demonstrate a dual-mode spatial index modulation (DM-SIM) scheme for spec-tral efficiency enhancement of band-limited multiple-input multiple-output optical wireless communication (MIMO-OWC) systems. By performing dual-mode index modulation in the spatial domain, DM-SIM can transmit both spatial and constellation symbols. Since constellation design plays a vital role in the proposed DM-SIM scheme, we further propose three dual-mode constellation design approaches including phase rotation, amplitude scaling and joint phase rotation and amplitude scaling. Moreover, we also designed a differential log-likelihood ratio (LLR) detector for the pro-posed DM-SIM scheme. Experimental results show that the joint phase rotation and amplitude scaling approach can achieve a remarkable 3.2 dB signal-to-noise ratio (SNR) gain compared with the phase rotation approach in a 2x2 MIMO-OWC system applying DM-SIM. (c) 2024 Optica Publishing Group
引用
收藏
页码：334 / 337
页数：4
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