Optimal Power Allocation in SM-OFDM System Based on Visible Light Communications

被引：0
|
作者：
Fu, Hongshuang
Zhu, Yijun
Cai, Wenbing
机构：
来源：
APPLIED SCIENCE, MATERIALS SCIENCE AND INFORMATION TECHNOLOGIES IN INDUSTRY | 2014年 / 513-517卷
关键词：
Visible Light Communication; Spatial Multiplexing; SM-OFDM; Power Allocation; Symbol Error Rate;
D O I：
10.4028/www.scientific.net/AMM.513-517.3429
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Spatial Modulation is a kind of spatial multiplexing schemes conveying information by the location of transmit antennas and spatial modulation (SM) along with OFDM can be applied to visible light communications for higher data rates. The closed form of symbol error rate (SER) in optical SM-OFDM communication system is derived in this paper. SER is a convex function of power allocation coefficients, therefore there exist optimal allocation coefficients minimizing SER. The optimal allocation coefficients are derived for different channels and numbers of transmit antennas. Analytical results are validated by Monte Carlo simulation results and these results show that a significant SER improvement is obtained by using the power allocation. In addition, the optimal allocation coefficients are affected by the channel and number of transmitters.
引用
收藏
页码：3429 / 3433
页数：5
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