Problem
Research questions and friction points this paper is trying to address.
Multi-UAV communication
In-band full-duplex
Co-channel interference
Self-interference
UAV wireless links
Geometry-Aware Multi-UAV Full-Duplex Communication: System Design and Experiment
🤖 AI Summary
This study addresses the excessive energy consumption of self-interference cancellation (SIC) in lightweight wireless links for unmanned aerial vehicles (UAVs) by proposing a multi-UAV in-band full-duplex (MU-IBFD) architecture that eliminates the need for dedicated SIC circuitry. The proposed approach leverages high-gain directional antennas and uplink–downlink channel separation techniques to transform self-interference into controllable co-channel interference. Furthermore, a three-dimensional geometry-aware interference model is constructed, and the theoretical reliable operating region is derived. Validated through prototype development and real-world flight tests, the proposed model demonstrates high accuracy and effectiveness. Experimental results show that the downlink capacity significantly surpasses that of conventional time-division duplexing (TDD) schemes while approaching the ideal full-duplex limit, successfully enabling real-time 4K video transmission.
📝 Abstract
The deployment of unmanned aerial vehicle (UAV) systems relies on high-performance yet lightweight wireless links between UAVs and ground stations (GSs). This paper presents a geometry-aware multi-UAV in-band full-duplex (MU-IBFD) communication system that uses high-gain directional antennas and separated uplink/downlink channels to convert self-interference into controllable co-channel interference (CCI) between UAVs, thereby avoiding energy-intensive self-interference cancelers on UAVs. We also derive a geometry-aware CCI model and define a reliable operating region (ROR) in the 3D airspace, within which the SINR requirement is satisfied. A prototype consisting of two UAVs and a GS is developed, and field trials are conducted. The measured CCI as a function of UAV positions agrees well with the theoretically predicted non-ROR region, and the downlink capacity significantly exceeds that of a conventional time-division duplex (TDD) with omni-directional scheme and higher transmit power and approaches that of ideal IBFD in most of the airspace. A proof-of-concept 4K/60p video transmission further demonstrates the practical potential of the proposed MU-IBFD system.
Innovation
Methods, ideas, or system contributions that make the work stand out.
Multi-UAV Full-Duplex
Geometry-Aware CCI Model
Reliable Operating Region
Directional Antennas
In-Band Full-Duplex
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