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Path selection in parallel multihop uvlc systems over turbulence channels

Title	Path selection in parallel multihop uvlc systems over turbulence channels
Author	Elamassie, Mohammed
Publication Date:	2024-07
Publication Place	- IEEE
Subject	Underwater visible light communications (uvlcs), Relay-assisted transmission, Probability of outage, Weak and moderate/strong turbulence channels, Lth best path selection, Diversity order (do)
Type	Periodical
Language	English
Digital	Yes
Manuscript	No
Library:	Özyeğin University
Library Asset ID	0364-9059
Record ID	3e36ab73-137a-4ef8-8fe4-412e0fea33cc
Library Location	Electrical & Electronics Engineering
Date	2024-07
Sample Text	This article explores an underwater communication system using visible light, featuring multiple parallel relay paths and several decode-and-forward relays per path. In traditional multihop systems, the failure of a single relay can result in the collapse of the entire system, rendering single-path multihop systems unreliable. Therefore, the adoption of parallel paths becomes important to enhance system robustness. In pursuit of reducing hardware complexity, the primary goal is to select one path from these parallel options. However, the challenge lies in choosing the best path, given various factors such as noise affecting channel coefficient estimation and the impact of erroneous feedback channels. In light of these challenges, our investigation delves into a comprehensive evaluation of the $l\mathrm{{th}}$ best path selection in underwater environments. We consider both weak and moderate/strong turbulence conditions, with "weak" and "moderate/strong" turbulence conditions modeled by lognormal (LN) and gamma-gamma (GG) distributions, respectively. Closed-form expressions for the exact, approximate, and asymptotic probability of an outage are derived for both distributions when the lth best path is chosen for transmission. Additionally, we explore the incremental diversity order for LN turbulence channels and investigate the diversity order for GG turbulence channels. This comprehensive approach enables a more robust evaluation of the system's performance under various underwater conditions.
DOI	10.1109/JOE.2024.3360532
Cilt	49

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Özyeğin University

Path selection in parallel multihop uvlc systems over turbulence channels

Author Elamassie, Mohammed

Publication Date 2024-07

Publication Place - IEEE

Subject Underwater visible light communications (uvlcs), Relay-assisted transmission, Probability of outage, Weak and moderate/strong turbulence channels, Lth best path selection, Diversity order (do)

Type Periodical

Language English

Digital Yes

Manuscript No

Library Özyeğin University

Library Asset ID 0364-9059

Record ID 3e36ab73-137a-4ef8-8fe4-412e0fea33cc

Library Location Electrical & Electronics Engineering

Date 2024-07

Sample Text This article explores an underwater communication system using visible light, featuring multiple parallel relay paths and several decode-and-forward relays per path. In traditional multihop systems, the failure of a single relay can result in the collapse of the entire system, rendering single-path multihop systems unreliable. Therefore, the adoption of parallel paths becomes important to enhance system robustness. In pursuit of reducing hardware complexity, the primary goal is to select one path from these parallel options. However, the challenge lies in choosing the best path, given various factors such as noise affecting channel coefficient estimation and the impact of erroneous feedback channels. In light of these challenges, our investigation delves into a comprehensive evaluation of the $l\mathrm{{th}}$ best path selection in underwater environments. We consider both weak and moderate/strong turbulence conditions, with "weak" and "moderate/strong" turbulence conditions modeled by lognormal (LN) and gamma-gamma (GG) distributions, respectively. Closed-form expressions for the exact, approximate, and asymptotic probability of an outage are derived for both distributions when the lth best path is chosen for transmission. Additionally, we explore the incremental diversity order for LN turbulence channels and investigate the diversity order for GG turbulence channels. This comprehensive approach enables a more robust evaluation of the system's performance under various underwater conditions.

DOI 10.1109/JOE.2024.3360532

Cilt 49