NetISAC: Design and performance analysis of network-level ISAC: More than Integration

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Radar and communications technologies have developed independently for decades, resulting in the widespread mutual occupationof the spectrum. Smart cities bring high-reliability sensing and communication (S&C) requirements, with the number of connecteddevices expected to jump to 27 billion by 2025. The independent development of S&C systems is no longer sustainable and leads tounprecedented spectrum and hardware demands. Integrated sensing and communications (ISAC) aim to share wirelessinfrastructures for S&C in hardware-, energy-, spectrum-, and cost-efficient ways. Network-level ISAC is to enable next-generationcommunication, remote sensing, and incident detection. This proposal aims to develop novel performance analysis and signalprocessing techniques to enable promising ISAC networks via interdisciplinary studies, to handle several critical challenges: 1)Complex natures of interference from S&C operations require new signal processing tools, 2) Network design for ISAC cannot betreated as an extension of multi-cell communications, 3) The limited range of terrestrial ISAC necessitates its integration withnonterrestrial nodes, 4) Dynamic natures of ISAC channels necessitate new modelling frameworks. To address these, NetISAC willwork across multiple domains, from fundamental limits to ISAC network topology to network-level interference management. Toenlarge S&C coverage, the applicant will apply his experience in drones to ISAC networks. Finally, proof of concept experiments willbe conducted to test the proposed approaches. Supervised by Prof. Christos Masouros, an expert in signal processing and wirelesscommunications, the applicant will acquire new theoretical and experimental knowledge in ISAC networks. The track record of theapplication's expertise in beamforming, trajectory optimization, and S&C collaboration, with the leading expertise of the host groupin link-level interference exploitation and ISAC, guarantees the success of this project.