Rate-Splitting Multiple Access for Simultaneous Multi-User Communication and Multi-Target Sensing

Kexin Chen

doi:10.1109/TVT.2024.3383657

Rate-Splitting Multiple Access for Simultaneous Multi-User Communication and Multi-Target Sensing

2024-09-01

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DOI：10.1109/TVT.2024.3383657

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In this paper, we initiate the study of rate-splitting multiple access (RSMA) for a mono-static integrated sensing and communication (ISAC) system, where the dual-functional base station (BS) simultaneously communicates with multiple users and detects multiple moving targets. We aim at optimizing the ISAC waveform to jointly maximize the max-min fairness (MMF) rate of the communication users and minimize the largest eigenvalue of the Cram & eacute;r-Rao bound (CRB) matrix for unbiased estimation. The CRB matrix considered in this work is general as it involves the estimation of the angular direction, the complex reflection coefficient, and the Doppler frequency for multiple moving targets. Simulation results demonstrate that RSMA maintains a larger communication and sensing trade-off than conventional space-division multiple access (SDMA) and it is capable of detecting multiple targets with a high detection accuracy. The finding highlights the potential of RSMA as an effective and powerful strategy for interference management in the general multi-user multi-target ISAC systems.

Keywords:

Sensors

Radar

Measurement

Interference

Doppler effect

Vectors

Estimation

Cram & eacute

r-Rao bound (CRB)

integrated sensing and communications (ISAC)

MIMO radar

rate-splitting multiple access (RSMA)

Rate-Splitting Multiple Access for Simultaneous Multi-User Communication and Multi-Target Sensing

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