Performance Analysis of Wireless Optical Adaptive Subcarrier MDPSK Modulation System

CHEN Dan; LEI Yu; KE Xi-zheng

doi:10.3969/j.issn.0372-2112.2018.07.030

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Performance Analysis of Wireless Optical Adaptive Subcarrier MDPSK Modulation System

更新时间：2025-07-16

- Performance Analysis of Wireless Optical Adaptive Subcarrier MDPSK Modulation System
- Acta Electronica Sinica Vol. 46, Issue 7, Pages: 1748-1753(2018)
- 作者机构：
  
  西安理工大学自动化与信息工程学院,陕西,西安,710048
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China (No.61671375);Industrial Science and Technology Research and Development Project of Shaanxi Province (No.2016GY-082);Key Industry Innovation Program of Shaanxi Province (Np.2017ZDCXL-GY-06-01)
- DOI：10.3969/j.issn.0372-2112.2018.07.030
  CLC： TN929.1
- Published Online：25 July 2018，
  
  Published：2018
- 稿件说明：
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CHEN Dan, LEI Yu, KE Xi-zheng. Performance Analysis of Wireless Optical Adaptive Subcarrier MDPSK Modulation System[J]. Acta Electronica Sinica, 2018, 46(7): 1748-1753.
DOI：

CHEN Dan, LEI Yu, KE Xi-zheng. Performance Analysis of Wireless Optical Adaptive Subcarrier MDPSK Modulation System[J]. Acta Electronica Sinica, 2018, 46(7): 1748-1753. DOI： 10.3969/j.issn.0372-2112.2018.07.030.

摘要

无线光通信中的自适应传输技术可有效抑制大气湍流引起的信道衰落.根据接收信噪比和预定目标误比特率要求，本文对通过瞬时湍流特性改变调制阶数的无线光自适应传输的通信系统进行了研究.给出采用Malaga分布湍流模型分别描述Gamma-Gamma、对数正态以及K分布湍流信道的相关参数设置；推导了Malaga湍流信道下无线光自适应多进制差分相移键控（MDPSK，M-ary Differential Phase Shift Keying）调制系统的平均误比特率、频谱效率以及中断概率表达式，以及基于MeijerG函数的渐近表达式.MDPSK自适应和非自适应两种调制系统特性分析结果表明：自适应调制系统不但在相同电信噪比下可获得更低的平均误比特率，还可以大大提高频谱效率，而不需要增加额外传输功率或牺牲误比特率.

Abstract

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

-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.

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