LACO-OFDM With Index Modulation for Optical Wireless Systems

被引：11
作者：
Azim, Ali Waqar [1 ]
Le Guennec, Yannis [2 ]
Chafii, Marwa [3 ]
Ros, Laurent [2 ]
机构：
[1] CEA Leti, MINATEC, F-38054 Grenoble, France
[2] Univ Grenoble Alpes, CNRS, Inst Engn, Grenoble INP,GIPSA LAB, F-38000 Grenoble, France
[3] CY Cergy Paris Univ, ETIS, ENSEA, CNRS,UMR 8051, F-95000 Cergy, France
来源：
IEEE WIRELESS COMMUNICATIONS LETTERS | 2021年 / 10卷 / 03期
关键词：
Discrete Fourier transform; orthogonal frequency-division multiplexing; index modulation; intensity-modulation and direct-detection; optical wireless systems;
D O I：
10.1109/LWC.2020.3045119
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
In this letter, we propose layered asymmetrically clipped optical-orthogonal frequency-division multiplexing (LACO-OFDM) with index modulation (IM), i.e., LACO-OFDM-IM for optical wireless systems. In classical LACO-OFDM, the spectral leakage because of out-of-band clipping harmonics increases the baseband bandwidth (BB) resulting in lower spectral efficiencies. For LACO-OFDM-IM, we use IM and optimize the BB by filtering the out-of-band clipping harmonics. This amalgamation of IM and BB optimization leads to better spectral efficiency (SE). Simulation results shall affirm that LACO-OFDM-IM achieves higher SE, affords a comprehensive granularity for SE/energy efficiency trade-off, and outperforms classical alternatives in terms of bit-error-rate in both line-of-sight and time-dispersive channels.
引用
收藏
页码：664 / 667
页数：4
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