Performance Analysis of Non-Identically Distributed FSO Systems with Dual- and Triple- Branch Based on MRC over Gamma-Gamma Fading Channels  

作　　者：Tao Liu Hailin Zhang Jiaoying Wang Huihua Fu Ping Wang Jing Li 

机构地区：[1]State Key Laboratory of Integrated Service Networks, School of Telecommunications Engineering, Xidian University, Xi'an, 710071, China [2]Xi'an Institute of Applied Optics, Xi'an 71007 l, China

出　　处：《China Communications》2018年第1期45-51,共7页中国通信（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 61671347);the Fundamental ResearchFunds for the Central Universities (Grant No. 20106151859 & 20106161859);supported by 111 Project of China (B08038)

摘　　要：In this work, the performance of free-space optical(FSO) communication system based on maximal ratio combining using binary phase shift keying subcarrier intensity modulation over Gamma-Gamma fading channels has been studied systematically. Under identically or non-identically distributed branches, the analytical expressions for the bit error rate function of signal-to-noise are derived by expressing the modified Bessel function of second kind with Meijer G-function for dualand triple-branch systems, respectively. In terms of H-fox function, the new expressions have more general forms and are more efficient for computation. It is found that the dual-and triple-branch systems significantly outperform the direct link system under weak, moderate and strong turbulence conditions. Monte Carlo simulation is also provided to confirm the accuracy of the proposed model.In this work, the performance of free-space optical(FSO) communication system based on maximal ratio combining using binary phase shift keying subcarrier intensity modulation over Gamma-Gamma fading channels has been studied systematically. Under identically or non-identically distributed branches, the analytical expressions for the bit error rate function of signal-to-noise are derived by expressing the modified Bessel function of second kind with Meijer G-function for dualand triple-branch systems, respectively. In terms of H-fox function, the new expressions have more general forms and are more efficient for computation. It is found that the dual-and triple-branch systems significantly outperform the direct link system under weak, moderate and strong turbulence conditions. Monte Carlo simulation is also provided to confirm the accuracy of the proposed model.

关 键 词：bit error rate dual-and triple-branch free-space optical systems Gamma-Gamma fading maximal ratio combining(MRC) 

分 类 号：TN929.1[电子电信—通信与信息系统]