Outage Analysis of Adaptive Combining Scheme for Hybrid FSO/RF Communication

Siddharth, Mokkapati; Shah, Suyash; Swaminathan, R

doi:10.1109/ncc48643.2020.9056009

Cited by 14 publications

(11 citation statements)

References 8 publications

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“…• In [16], performance analysis of single-hop hybrid FSO/RF SATCOM and dual-hop space-air-ground integrated hybrid FSO/RF SATCOM with HAPS has been carried for single-threshold-based hard-switching scheme, which involves frequent hardware switching with sub-optimal performance. • In [17] and [18], adaptive-combining-based switching scheme is analysed extensively for single-hop terrestrial and SATCOM scenarios. Moreover, the closed-form expressions are derived only for the outage and not for the average symbol error rate (SER).…”

Section: A Motivationsmentioning

confidence: 99%

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Adaptive-Combining-Based Hybrid FSO/RF Satellite Communication With and Without HAPS

et al. 2021

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In recent years, a growing interest has been witnessed in the usage of free space optics (FSO) link for satellite communication (SATCOM) scenarios, as it offers much higher data rates up to gigabits per second (Gbps) compared to existing radio frequency (RF) link. However, FSO links are sensitive to beam scintillation and pointing errors. In this paper, we consider a hybrid FSO/RF communication between ground station (GS) and satellite, where the RF link will act as a backup link to improve the reliability of FSO communication. In addition, we also consider high-altitude platform station (HAPS), which will act as a relay station, between GS and satellite to improve the end-to-end system performance. This has led to the development of space-air-ground integrated hybrid FSO/RF SATCOM networks. We analyse the performance of the proposed hybrid network considering an adaptive-combining-based switching scheme for both uplink and downlink scenarios with and without using HAPS as a relay station. In case of adaptivecombining-based switching scheme, the data is continuously transmitted over the FSO link, while maximalratio-combining (MRC) of RF and FSO links is performed when the quality of FSO link deteriorates. The performance analysis of adaptive-combining-based switching scheme in terms of outage and average symbol error rate (SER) is carried out and the same is compared with the single-link FSO SATCOM and single-threshold-based switching scheme proposed in the literature for hybrid FSO/RF SATCOM. In addition, the performance gain obtained by the proposed adaptive combining scheme over single-link FSO system for different channel conditions is also reported. Further, the asymptotic analysis is also carried out to obtain the diversity gain of the proposed system.INDEX TERMS Adaptive combining, free space optics, high-altitude platform station (HAPS), hybrid FSO/RF, performance analysis.

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Section: A Motivationsmentioning

confidence: 99%

“…Further, maximal-ratio-combining (MRC) of FSO and RF links is performed at the receiver when RF link is active. Recently, we investigated the outage performance of adaptive combining scheme in [18] for both terrestrial and SATCOM scenarios.…”

Section: Introductionmentioning

confidence: 99%

Adaptive-Combining-Based Hybrid FSO/RF Satellite Communication With and Without HAPS

et al. 2021

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“…In both [18], [19], the single-threshold-based scheme was used to switch between RF and FSO links. The adaptive-combining-based switching scheme was used for integrated satellite-HAP-ground with hybrid FSO/RF system in both cases of uplink and downlink [20], [21]. The maximal-ratio-combining of FSO and RF links was implemented at the receiver when the RF link was transmitted simultaneously with the FSO link.…”

Section: Introductionmentioning

confidence: 99%

On the Design of Rate Adaptation for Relay-Assisted Satellite Hybrid FSO/RF Systems

Le¹,

Nguyen²

2021

Preprint

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<p>This paper addresses the design of hybrid free-space optical/radio frequency (FSO/RF) systems for a high-altitude platform (HAP)-aided relaying satellite communication for mobile networks supported by unmanned aerial vehicle (UAV). While prior work primarily focused on fixed-rate design, which frequently switches between FSO and RF lead to reduce the system performance, we propose a rate adaptation design that gradually adjusts the data rate in each link when its channel state fluctuates. The proposed design's downlink performance is analyzed, taking into account many challenging issues, including beam spreading loss, cloud attenuation, statistical behaviors of the atmospheric turbulence in the dual-hop channel, and pointing misalignment due to the UAV hovering. Different performance metrics are analytically derived based on channel modelings, such as outage probability, average transmission rate, achievable spectrum efficiency, and average transmission rate. The numerical results quantitatively confirm the effectiveness of our proposed system under the impact of UAV hovering misalignment and atmospheric-related issues like clouds and turbulence. Finally, Monte-Carlo simulations validate the accuracy of theoretical results.</p>

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“…In commerce, RF link used as a standby backup for the FSO link in order to obtain a hybrid solution, so that when the FSO channel is out of service, the RF link operates [5,6]. A coding scheme for the hybrid channel has been presented by Vangala and Pishro-Nik [7,8].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis for Hybrid Massive MIMO FSO/RF Links Based on Efficient Channel Codes

2021

IJIES

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Outage Analysis of Adaptive Combining Scheme for Hybrid FSO/RF Communication

Cited by 14 publications

References 8 publications

Adaptive-Combining-Based Hybrid FSO/RF Satellite Communication With and Without HAPS

Adaptive-Combining-Based Hybrid FSO/RF Satellite Communication With and Without HAPS

On the Design of Rate Adaptation for Relay-Assisted Satellite Hybrid FSO/RF Systems

Performance Analysis for Hybrid Massive MIMO FSO/RF Links Based on Efficient Channel Codes

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