Title :
Asymptotic Analysis of TWR Assisted FSO Links With Partial Dual-Relay Selection
Author :
Puri, Parul ; Garg, Parul ; Aggarwal, Mona
Author_Institution :
Div. of Electron. & Commun. Eng., Netaji Subhas Inst. of Technol., New Delhi, India
Abstract :
In this letter, a partial-dual relay selection (P-DRS) scheme is proposed for amplify-and-forward protocol based two-way relay (TWR) assisted free space optical (FSO) communication systems. Closed form asymptotic expression is developed for the moment generating function (mgf) of the equivalent signal-to-noise ratio of the system, considering an optical channel that is modeled by the Gamma-Gamma distribution and affected by path losses and pointing errors. Expressions for the outage probability and average error probability are calculated based on the mgf. Finally, the mathematical analysis is accompanied with simulations to demonstrate the effectiveness of the proposed P-DRS scheme.
Keywords :
amplify and forward communication; error statistics; gamma distribution; optical communication; protocols; relay networks (telecommunication); space communication links; telecommunication network reliability; wireless channels; Gamma-Gamma distribution; P-DRS scheme; TWR assisted FSO link asymptotic analysis; amplify and forward protocol; average error probability; closed form asymptotic expression; equivalent signal-to-noise ratio; free space optical communication system; mgf; moment generating function; optical channel; outage probability; partial dual-relay selection; two-way relay system; Adaptive optics; Error probability; Optical feedback; Optical modulation; Optical receivers; Relays; Signal to noise ratio; Amplify-and-forward; Gamma-Gamma distribution; Meijer’s G-function; Meijer´s G-function; amplify-and-forward; free space optical systems; partial relay selection; pointing error; two-way relay;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2015.2414922
