Link Adaptation for MIMO OFDM Visible Light Communication Systems

被引：32
|
作者：
Narmanlioglu, Omer [1 ]
Kizilirmak, Refik Caglar [2 ]
Baykas, Tuncer [3 ]
Uysal, Murat [1 ]
机构：
[1] Ozyegin Univ, Dept Elect & Elect Engn, TR-34794 Istanbul, Turkey
[2] Nazarbayev Univ, Dept Elect & Elect Engn, Astana 010000, Kazakhstan
[3] Istanbul Medipol Univ, Dept Comp Engn, TR-34810 Istanbul, Turkey
来源：
IEEE ACCESS | 2017年 / 5卷
关键词：
Visible light communication; OFDM; adaptive transmission; bit loading; MIMO mode switching; MODULATION SCHEMES; OPTICAL OFDM; VLC SYSTEMS;
D O I：
10.1109/ACCESS.2017.2771333
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 paper, we investigate link adaptation for an orthogonal frequency division multiplexing (OFDM)-based multiple-input multiple-output (MIMO) visible light communication (VLC) system. The proposed adaptive OFDM VLC system supports both repetition coding (RC) and spatial multiplexing (SM) as MIMO modes and allows spatial mode switching based on channel conditions. Regarding to the instantaneous signal-to-noise ratio for both RC and SM modes, the maximum constellation size that can be supported for each MIMO mode on each subcarrier is determined. The MIMO mode that gives the highest spectral efficiency (SE) is then selected. The proposed joint MIMO mode selection and bit loading scheme maximizes the SE while satisfying a target bit error rate. Our numerical results reveal that a peak data rate up to 18.3 Gb/sec can be achieved in a 16 x 16 MIMO setting using light emitting diodes with cut-off frequency of 10 MHz in typical indoor environments.
引用
收藏
页码：26006 / 26014
页数：9
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