NDLI: Performance evaluation of decode-and-forward-based asymmetric SIMO-RF/FSO system with misalignment errors

Content Provider	IET Digital Library
Author	Singhal, Neha Bansal, Ankur Kumar, Ashwni
Abstract	The authors analyse a dual-hop mixed radio frequency/free space optical (RF/FSO) communication system comprising of single-input multiple-output (SIMO) RF hop and a single FSO hop. The RF source is connected to an optical destination through a decode-and-forward relay having RF/FSO capabilities. Each link in SIMO-RF hop is assumed to experience independent and identically distributed (i.i.d.) Nakagami-m fading. For FSO hop, a unified novel expression for the probability density function (PDF) of irradiance has been derived which unifies Gamma–Gamma and generalised-K ( K G ) distributions with misalignment error. Moreover, we obtain a unified PDF of instantaneous signal-to-noise ratio (SNR) by unifying the heterodyne detection and intensity modulation/direct detection schemes. Utilising the unified PDF, we derive novel unified closed-form expressions for average symbol error probability (for different RF modulation techniques), outage probability, and ergodic capacity for the system under consideration. We have also analysed the considered system for high SNR conditions and have analytically obtained the unified diversity order of the same. The derived results clearly show the impact of misalignment error, severe atmospheric conditions, type of detection scheme, and number of RF links on the system performance. All the analytical results are validated through simulations.
Starting Page	2244
Ending Page	2252
Page Count	9
ISSN	17518628
Volume Number	11
e-ISSN	17518636
Issue Number	Issue 14, Sep (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/11/14
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2017.0439
Journal	IET Communications
Publisher Date	2017-07-28
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Decode And Forward Communication Decode-and-forward Relay Decode-and-forward-based Asymmetric SIMO-RF/FSO System Dual-hop Mixed Radio Frequency/free Space Optical Communication System Ergodic Capacity Free Space Optical Communication Free Space Optical Link Heterodyne Detection Intensity Modulation/direct Detection Scheme Misalignment Error Nakagami Channel Nakagami-m Fading Optical Destination Outage Probability PDF Performance Evaluation Probability Probability Density Function Relay Network RF Modulation Technique RF/FSO Communication System Statistics Symbol Error Probability Telecommunication
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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