Uncoordinated Cooperative OFDM Multi-Hop UAV Relay Networks Using Virtual Channels Based on All-Pass Filters
Noura Sellami, Mohamed Siala

TL;DR
This paper introduces a virtual channel approach using all-pass filters for multi-hop UAV relay networks, improving cooperative diversity and transmission reliability in uncoordinated OFDM systems.
Contribution
It presents a novel virtual channel method with all-pass filters and integrates it with distributed space-time coding to enhance UAV relay network performance.
Findings
Significant performance improvement over phase dithering schemes
Effective mitigation of destructive interference in uncoordinated UAV relays
Enhanced cooperative diversity through virtual channels
Abstract
In this paper, we propose an efficient transmission scheme for autonomous cooperative Orthogonal Frequency Division Multiplexing (OFDM) based multi-hop Unmanned Aerial Vehicle (UAV) relay networks. These systems often suffer from destructive interference at the destination node due to uncoordinated transmissions of common packets by cooperating UAVs. To address this issue, we introduce the concept of virtual transmit channels at each UAV, implemented using truncated all-pass filters (APFs). This approach ensures that all subcarriers benefit from comparable transmit powers, guaranteeing excellent performance when a single UAV is transmitting. In scenarios where multiple UAVs cooperate without coordination, the inherent randomness of the generated virtual channels facilitates cooperative diversity, effectively mitigating destructive interference. We further integrate this method with the…
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Taxonomy
TopicsCooperative Communication and Network Coding · UAV Applications and Optimization · Advanced Wireless Communication Technologies
