Performance Analysis of Wireless Optical Adaptive Subcarrier MDPSK Modulation System

被引：0
作者：
Chen D. [1 ]
Lei Y. [1 ]
Ke X.-Z. [1 ]
机构：
[1] School of Automation and Information Engineering, Xi'an University of Technology, Xi'an, 710048, Shaanxi
来源：
| 1748年 / Chinese Institute of Electronics卷 / 46期
关键词：
Adaptive transmission; Average bit error; Malaga turbulence distribution; Spectrum efficiency; Subcarrier modulation; Wireless optical communication;
D O I：
10.3969/j.issn.0372-2112.2018.07.030
中图分类号：
学科分类号：
摘要：
Adaptive transmission technology can effectively inhibit channel fading caused by atmospheric turbulence in wireless optical communications. Under the predefined bit error rate and received signal-to-noise ratio requirement, this paper researched a wireless optical adaptive transmission system due to changing the modulation order through the instantaneous nature of turbulence. Malaga distribution turbulence model is used to describe the distribution of the Gamma-Gamma, Lognormal and K distribution turbulence channel separately, and the related parameters setting methods are given. Analytical expressions of spectrum efficiency, average bit error rate and outage probability under Malaga channel are derived in the adaptive subcarrier M-ary differential phase shift keying (MDPSK) system. Closed form expressions are also derived based MeijerG function. With the comparison between the performance of adaptive modulation and non-adaptive modulation system, the results show that the adaptive system can acquire lower BER performance under the same telecom noise ratio, and also improve the spectrum efficiency without additional transmission power or sacrifice bit error rate. © 2018, Chinese Institute of Electronics. All right reserved.
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页码：1748 / 1753
页数：5
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