Performance Analysis of RF-FSO Multi-Hop Networks

Behrooz Makki, Tommy Svensson, Maite Brandt-Pearce, Mohamed-Slim Alouini

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

7 Scopus citations

Abstract

We study the performance of multi-hop networks composed of millimeter wave (MMW)-based radio frequency (RF) and free-space optical (FSO) links. The results are obtained in the cases with and without hybrid automatic repeat request (HARQ). Taking the MMW characteristics of the RF links into account, we derive closed-form expressions for the network outage probability. We also evaluate the effect of various parameters such as power amplifiers efficiency, number of antennas as well as different coherence times of the RF and the FSO links on the system performance. Finally, we present mappings between the performance of RF- FSO multi-hop networks and the ones using only the RF- or the FSO-based communication, in the sense that with appropriate parameter settings the same outage probability is achieved in these setups. The results show the efficiency of the RF-FSO setups in different conditions. Moreover, the HARQ can effectively improve the outage probability/energy efficiency, and compensate the effect of hardware impairments in RF-FSO networks. For common parameter settings of the RF-FSO dual- hop networks, outage probability 10^{-4} and code rate 3 nats-per-channel-use, the implementation of HARQ with a maximum of 2 and 3 retransmissions reduces the required power, compared to the cases with no HARQ, by 13 and 17 dB, respectively.
Original languageEnglish (US)
Title of host publication2017 IEEE Wireless Communications and Networking Conference (WCNC)
PublisherIEEE
DOIs
StatePublished - May 12 2017
Event2017 IEEE Wireless Communications and Networking Conference, WCNC 2017 - San Francisco, CA, USA
Duration: Mar 19 2017Mar 22 2017

Conference

Conference2017 IEEE Wireless Communications and Networking Conference, WCNC 2017
Period03/19/1703/22/17

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