Generalized Spatial Modulation for Multi-User in Visible Light Communication

2019 28th Wireless and Optical Communications Conference (WOCC) Pub Date : 2019-05-01 DOI:10.1109/WOCC.2019.8770618

M. Jha, Navin Kumar, Y. Lakshmi

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引用次数: 4

Abstract

In this paper, we analyzed the generalized spatial modulation (generalized SM) transmission technique for multi user indoor visible light communication (VLC) system. In generalized SM, number of bits conveyed per transmitter includes modulation symbol bits and active transmitter indices bits. Block diagonalization (BD) precoding technique is used to avoid multi user interference (MUI) in the transmitter without interference between photodiodes of the same user resulting in the noise reduction. A comparison is performed between the generalized SM with conventional Multiple Input Multiple Output (MIMO), spatial multiplexing (SMP) MIMO and spatial modulation MIMO transmission technique for multi user VLC system with regard to bit error rate (BER) performance using simulation. Simulation results show that generalized SM MIMO technique offers better signal to noise ratio (SNR) than SM MIMO by 2 dB, SMP MIMO by 5 dB and conventional MIMO technique by 8.5 dB to achieve the same BER of 10−6. We also analyzed the influence of field of view (FOV) at an optical receiver on SNR performance with respect to single light emitting diode (LED) power.

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可见光通信中多用户的广义空间调制

本文分析了多用户室内可见光通信(VLC)系统的广义空间调制(广义SM)传输技术。在广义SM中，每个发射机传输的比特数包括调制符号比特和主动发射机索引比特。块对角化(BD)预编码技术用于避免发射机中的多用户干扰(MUI)，而不会导致同一用户的光电二极管之间的干扰，从而降低噪声。通过仿真比较了多用户VLC系统中广义SM与传统多输入多输出(MIMO)、空间复用(SMP) MIMO和空间调制MIMO传输技术在误码率(BER)方面的性能。仿真结果表明，广义SM MIMO技术的信噪比(SNR)比SM MIMO提高了2 dB，比SMP MIMO提高了5 dB，比传统MIMO提高了8.5 dB，达到10−6的误码率。我们还分析了光接收器的视场(FOV)对单个发光二极管(LED)功率的信噪比性能的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2019 28th Wireless and Optical Communications Conference (WOCC)

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