Switching-based cooperative decode-and-forward relaying for hybrid FSO/RF networks

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 greate...

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Main Authors: Sharma, Shubha, Madhukumar, A. S., Swaminathan, R.
Other Authors: School of Computer Science and Engineering
Format: Article
Language:English
Published: 2020
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Online Access:https://hdl.handle.net/10356/144831
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1448312020-11-26T03:09:04Z Switching-based cooperative decode-and-forward relaying for hybrid FSO/RF networks Sharma, Shubha Madhukumar, A. S. Swaminathan, R. School of Computer Science and Engineering Engineering::Computer science and engineering Gamma-gamma Distribution Maximal Ratio Combining 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. Accepted version 2020-11-26T03:09:03Z 2020-11-26T03:09:03Z 2019 Journal Article 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 1943-0620 https://hdl.handle.net/10356/144831 10.1364/JOCN.11.000267 6 11 267 281 en IEEE/OSA Journal of Optical Communications and Networking © 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. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Computer science and engineering
Gamma-gamma Distribution
Maximal Ratio Combining
spellingShingle Engineering::Computer science and engineering
Gamma-gamma Distribution
Maximal Ratio Combining
Sharma, Shubha
Madhukumar, A. S.
Swaminathan, R.
Switching-based cooperative decode-and-forward relaying for hybrid FSO/RF networks
description 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.
author2 School of Computer Science and Engineering
author_facet School of Computer Science and Engineering
Sharma, Shubha
Madhukumar, A. S.
Swaminathan, R.
format Article
author Sharma, Shubha
Madhukumar, A. S.
Swaminathan, R.
author_sort Sharma, Shubha
title Switching-based cooperative decode-and-forward relaying for hybrid FSO/RF networks
title_short Switching-based cooperative decode-and-forward relaying for hybrid FSO/RF networks
title_full Switching-based cooperative decode-and-forward relaying for hybrid FSO/RF networks
title_fullStr Switching-based cooperative decode-and-forward relaying for hybrid FSO/RF networks
title_full_unstemmed Switching-based cooperative decode-and-forward relaying for hybrid FSO/RF networks
title_sort switching-based cooperative decode-and-forward relaying for hybrid fso/rf networks
publishDate 2020
url https://hdl.handle.net/10356/144831
_version_ 1688665375602900992