Title :
Outage and Error Rate Analysis of Network-Coded Coherent TWR-FSO Systems
Author :
Puri, P. ; Garg, Parul ; Aggarwal, M.
Author_Institution :
Div. of Electron. & Commun. Eng., Netaji Subhas Inst. of Technol., New Dehli, India
Abstract :
This letter investigates a two-way relay assisted coherent free space optical system when the optical beam is subjected to gamma-gamma atmospheric turbulence and misalignment errors (pointing errors). A half-duplex relaying system consisting of two terminal nodes and a bidirectional relay is considered. The relay is based on decode-and-forward protocol and employs linear network coding to establish communication between the two terminal nodes in two time slots. Coherent detection with M-ary phase shift keying is employed. Closed form expressions for system outage and error performance for both binary and nonbinary cases are derived in terms of the well known Meijer´s G-function and are mathematically analyzed.
Keywords :
atmospheric turbulence; binary codes; decode and forward communication; linear codes; mathematical analysis; network coding; optical communication; phase shift keying; protocols; relay networks (telecommunication); M-ary phase shift keying; Meijer G-function; bidirectional relay; closed form expression; coherent detection; decode-and-forward protocol; error rate analysis; gamma-gamma atmospheric turbulence; half-duplex relaying system; linear network coding; mathematical analysis; misalignment error; network-coded coherent TWR-FSO system; optical beam; outage rate analysis; pointing error; two-way relay assisted coherent free space optical system; Adaptive optics; Closed-form solutions; Error analysis; Optical fiber communication; Optical receivers; Relays; Signal to noise ratio; Decode-and-forward; Meijer’s G-function; Meijer??s G-function; decode-and-forward; free space optical systems; gamma-gamma distribution; pointing error; two-way relay;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2333032
