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Title: | Performance Analysis of Relay-Assisted OWC Over Foggy Channel with Pointing Error |
Authors: | Zafaruddin, S.M. |
Keywords: | EEE Foggy channel Optical wireless communication (OWC) |
Issue Date: | Jun-2020 |
Publisher: | ARXIV |
Abstract: | Signal fading due to atmospheric channel impairments and pointing error is a major bottleneck for the performance of optical wireless communication (OWC). In this paper, we consider an amplify-and-forward (AF) optical relaying to enhance the performance of the OWC system with a negligible line-of-sight (LOS) link under the combined effect of fog and pointing error. We analyze the end-to-end performance of the relay-assisted system, which consists of complicated probability distribution functions. We derive analytical expressions of the outage probability, average signal-to-noise ratio (SNR), and ergodic rate in terms of OWC system parameters. We also develop an exact integral-form expression of these performance metrics using the half-harmonic mean of individual SNRs to validate the tightness of the derived analytical expressions. The numerical and simulation analysis shows that the proposed dual-hop relaying has significant performance improvement when comparing to the direct transmission over considered channel impairments. Compared to the direct transmission, the relay-assisted system requires almost 30 times less transmission power to achieve the same outage probability. The considered system also provides a significant gain in the average SNR and ergodic rate for practical scenarios of OWC deployment. |
URI: | https://arxiv.org/abs/2006.07105 http://dspace.bits-pilani.ac.in:8080/xmlui/handle/123456789/10000 |
Appears in Collections: | Department of Electrical and Electronics Engineering |
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