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Rate-Splitting Multiple Access for Joint Radar-Communications with Low-Resolution DACs

Dizdar, O; Kaushik, A; Clerckx, B; Masouros, C; (2021) Rate-Splitting Multiple Access for Joint Radar-Communications with Low-Resolution DACs. In: Proceedings of the 2021 IEEE International Conference on Communications Workshops (ICC Workshops). IEEE: Montreal, Canada. Green open access

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Abstract

In this paper, we introduce the design of a multi-antenna Joint Radar-Communication (JRC) system with Rate Splitting Multiple Access (RSMA) and low resolution Digital-to-Analog Converter (DAC) units. Using RSMA, the communication messages are split into private and common parts, then precoded and quantized before transmission. We use a problem formulation to design the JRC system with RSMA and low resolution DACs by maximizing communication sum-rate and the proximity of the resulting JRC waveform to an optimal radar beampattern under an average transmit power constraint. We solve the joint sum-rate maximization and beampattern error minimization problem using Alternating Direction Method of Multipliers (ADMM) method. The numerical results show that RSMA achieves a significantly higher sum-rate compared to Space Division Multiple Access (SDMA) while providing the same Normalized Mean Square Error (NMSE) for the designed radar beampattern.

Type: Proceedings paper
Title: Rate-Splitting Multiple Access for Joint Radar-Communications with Low-Resolution DACs
Event: 2021 IEEE International Conference on Communications Workshops (ICC Workshops)
Location: Montreal, Canada
ISBN-13: 978-1-7281-9441-7
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/ICCWorkshops50388.2021.9473742
Publisher version: https://doi.org/10.1109/ICCWorkshops50388.2021.947...
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Rate splitting multiple access, joint radar-communication, radar beampattern, low resolution DACs
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10125196
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