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Optimal Relay Location and Oppοrtunistic User-Scheduling for Stratospheric Communications

Authors:
Emmanouel T. Michailidis
Nikolaos Nomikos
Petros Bithas
Demosthenes Vouyioukas
Athanasios G. Kanatas

Keywords: Generalized Gamma (GG) fading; High-Altitude Platforms (HAPs); Multi-User (MU); oppurtunistic scheduling; outage probability; relay location.

Abstract:
This paper investigates the outage performance of a Decode-and-Forward (DF) Multi-User (MU) stratospheric relay communication system operating over Generalized-Gamma (GG) fading channels. This system consists of multiple users-sources, multiple users-destinations and a High-Altitude Platform (HAP) acting as a relay station in the stratosphere. Geometry-based optimal relay location with fixed power allocation is proposed, in order to minimize the outage probability. Exact and approximated expressions for the End-to-End (E2E) outage probability are derived and opportunistic scheduling is applied, where the Source-Destination (SD) pair with the highest instantaneous E2E Signal-to-Noise Ratio (SNR) is scheduled for communication. The results highlight the gains offered by the opportunistic SD scheduling and the optimization of the relay location on the overall performance.

Pages: 11 to 16

Copyright: Copyright (c) IARIA, 2018

Publication date: April 22, 2018

Published in: conference

ISSN: 2308-4480

ISBN: 978-1-61208-624-8

Location: Athens, Greece

Dates: from April 22, 2018 to April 26, 2018