Performance Analysis of Full Duplex Modulating Retro-Reflector Free-Space Optical Communications Over Single and Double Gamma-Gamma Fading Channels

被引：30

作者：

Yang, Guowei ^{[1
,2
]}

Li, Changying ^{[1
,2
]}

Li, Jing ^{[2
]}

Geng, Hujun ^{[2
]}

Bi, Meihua ^{[1
]}

Fan, Bing ^{[1
]}

Wang, Tianshu ^{[3
]}

机构：

[1] Hangzhou Dianzi Univ, Coll Commun Engn, Hangzhou 310018, Zhejiang, Peoples R China

[2] CETC Key Lab Aerosp Informat Applicat, Shijiazhuang 050081, Hebei, Peoples R China

[3] Changchun Univ Sci & Technol, Natl & Local Joint Engn Res Ctr Space Optoelect T, Changchun 130022, Jilin, Peoples R China

来源：

IEEE TRANSACTIONS ON COMMUNICATIONS | 2018年 / 66卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Free-space optics; modulating retro-reflector; channel model; full duplex; performance analysis; PROBABILITY DENSITY; LASERCOM SYSTEMS; RETROREFLECTOR; MODEL; SUM; APPROXIMATION; PROPAGATION; SIMULATION; PASS;

D O I：

10.1109/TCOMM.2018.2819671

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper initially presents the channel modeling for full duplex (FDX) modulating retro-reflector (MRR) free-space optical (FSO) systems under weak-to-strong turbulence conditions. The uplink channel in the MRR FSO communication is a conventional FSO channel that is typically modeled by a Gamma-Gamma (Gamma Gamma) distribution. The downlink channel is jointly affected by the turbulence-induced fading in two opposite passes as well as the reflection effect of the MRR, and its normalized channel fading can be described as the product of two correlated Gamma Gamma random variables (RVs). The channel model of the downlink is approximated by a single alpha-mu distribution via moment matching method. Then, we propose an effective signal modulation and detection scheme to achieve the FDX communication. The bit error rates of the MRR FSO systems are calculated by the analytical formulas that are derived based on the channel models of the two links, and also evaluated by the Monte-Carlo simulations to validate the derived formulas. The effect of system configurations and propagation conditions on the system performance is investigated, and the optimal designs to make a trade-off between the uplink and downlink performance are discussed.

引用

页码：3597 / 3609

页数：13

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