OFDM-Based Generalized Spatial Modulation for Optical Wireless Communication

被引：2

作者：

Zhong, Xin ^{[1
]}

Chen, Chen ^{[1
]}

Fu, Shu ^{[1
]}

Jian, Xin ^{[1
]}

Liu, Min ^{[1
]}

Deng, Xiong ^{[2
]}

机构：

[1] Chongqing Univ, Sch Microelect & Commun Engn, Chongqing 400044, Peoples R China

[2] Eindhoven Univ Technol TU E, Dept Elect Engn, NL-5600 MB Eindhoven, Netherlands

来源：

PROCEEDINGS OF THE 2021 IEEE 16TH CONFERENCE ON INDUSTRIAL ELECTRONICS AND APPLICATIONS (ICIEA 2021) | 2021年

基金：

中国国家自然科学基金;

关键词：

Optical wireless communication (OWC); multiple-input multiple-output (MIMO); generalized spatial modulation (GSM); MIMO TECHNIQUES;

D O I：

10.1109/ICIEA51954.2021.9516223

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, we propose two orthogonal frequency division multiplexing (OFDM)-based generalized spatial modulation (GSM) techniques, i.e., frequency domain GSM (FD-GSM) and time domain GSM (TD-GSM), for indoor multiple-input multiple-output optical wireless communication (MIMO-OWC) systems. Specifically, FD-GSM selects a subset of parallel OFDM modulators to transmit the same quadrature amplitude modulation (QAM) constellation symbol in the subcarrier level, while TD-GSM selects a subset of light-emitting diode (LED) transmitters to transmit the same time domain sample after OFDM modulation. Compared with the existing OFDM-based spatial modulation (SM) scheme, OFDM-based GSM can provide additional transmit diversity. For both FD-GSM and TD-GSM, maximum-likelihood (ML) detectors are employed to recover the spatial and constellation symbols. Moreover, TD-GSM usually requires a secondary direct current (DC) bias to work properly. The simulation results show that in a typical indoor 4 x 4 MIMO-OWC system, OFDM-based TD-GSM outperforms OFDM-based FD-GSM by adding a proper secondary DC bias.

引用

页码：1311 / 1316

页数：6

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