Outage Performance of Mixed RF-FSO Systems Over DGG and Nakagami-m Channels

被引：13

作者：

Ashrafzadeh, Behnam ^{[1
]}

Soleimani-Nasab, Ehsan ^{[2
]}

Zaimbashi, Amir ^{[1
]}

Uysal, Murat ^{[3
]}

机构：

[1] Shahid Bahonar Univ Kerman, Fac Elect & Comp Engn, Kerman 7616914111, Iran

[2] Grad Univ Adv Technol, Dept Elect & Comp Engn, Kerman 7631818356, Iran

[3] Ozyegin Univ, Dept Elect & Elect Engn, TR-34794 Istanbul, Turkey

来源：

IEEE WIRELESS COMMUNICATIONS LETTERS | 2020年 / 9卷 / 12期

基金：

美国国家科学基金会;

关键词：

Double generalized gamma; free space optical communications; Nakagami-m; RF/FSO; MULTIHOP;

D O I：

10.1109/LWC.2020.3014683

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

In mixed RF (radio frequency)-FSO (free space optical) systems, the FSO link is used for backhauling while RF is used for wireless access. In many practical deployment scenarios especially in urban environments, more than one FSO hop is required to avoid blockage and facilitate the line-of-sight connectivity. In this letter, we study the performance of a triple-hop RF-FSO-FSO link. We assume that the RF link is subject to Nakagami-m fading while FSO links are subject to double generalized Gamma (DGG) turbulence in addition to pointing errors. We first derive an exact closed-form expression for outage probability (OP) in terms of bivariate Fox-H function. Then, we carry out an asymptotical analysis to derive achievable diversity gains. We further present simulations to verify the accuracy of the derived expressions and investigate the effect of several system and channel parameters on the performance.

引用

页码：2135 / 2139

页数：5

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