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Title: Switching-based cooperative decode-and-forward relaying for hybrid FSO/RF networks
Authors: Sharma, Shubha
Madhukumar, A. S.
Swaminathan, R.
Keywords: Engineering::Computer science and engineering
Issue Date: 2019
Source: Sharma, S., Madhukumar, A. S., & Swaminathan, R. (2019). Switching-based cooperative decode-and-forward relaying for hybrid FSO/RF networks. IEEE/OSA Journal of Optical Communications and Networking, 11(6), 267-281. doi:10.1364/JOCN.11.000267
Journal: IEEE/OSA Journal of Optical Communications and Networking
Abstract: In this paper, we propose a switching scheme for a hybrid free-space optical (FSO)/radio frequency (RF) system with a selective decode-and-forward (DF) relay network. Specifically, the system transmits over FSO channels when the instantaneous signal-to-noise ratio (SNR) at the FSO receiver is greater than the threshold SNR. If the SNR drops below the threshold, the system switches and transmits over RF channels. The exact outage probability and average symbol error rate (SER) expressions are derived for a selective DF relay network with maximal ratio combining (MRC) assumed at the destination. In addition, the asymptotic outage and SER expressions with a lower computational complexity are derived and the diversity order is determined. The optimum value of the threshold SNR, which satisfies the target SER, has been calculated numerically for the proposed switching scheme. The theoretical results, which are validated by Monte Carlo simulations, show that the proposed switching scheme for a cooperative hybrid FSO/RF system drastically improves the performance compared to that of a single-hop (SH) switching-based hybrid FSO/RF and cooperative FSO systems.
ISSN: 1943-0620
DOI: 10.1364/JOCN.11.000267
Rights: © 2019 Optical Society of America. All rights reserved. This paper was published in IEEE/OSA Journal of Optical Communications and Networking and is made available with permission of Optical Society of America.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SCSE Journal Articles

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