Joint Transmit Waveform and Passive Beamforming Design for RIS-Aided DFRC Systems

Reconfigurable intelligent surface (RIS) is a promising technology for 6 G networks owing to its superior ability to enhance the capacity and coverage of wireless communications by smartly creating a favorable propagation environment. In this paper, we investigate the potential of employing RIS in d...

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Bibliographic Details
Published in:IEEE journal of selected topics in signal processing Vol. 16; no. 5; pp. 995 - 1010
Main Authors: Liu, Rang, Li, Ming, Liu, Yang, Wu, Qingqing, Liu, Qian
Format: Journal Article
Language:English
Published: New York IEEE 01.08.2022
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Algorithms
Array signal processing
Beamforming
Clutter
Communication
Computational geometry
Convexity
dual-functional radar-communication (DFRC)
multi-input multi-output (MIMO) radar
multi-user multi-input single-output (MU-MISO)
Optimization
Quality of service
Radar
Reconfigurable intelligent surface (RIS)
Sensors
Signal processing
Signal to noise ratio
space-time adaptive processing (STAP)
Waveforms
Wireless communication
Wireless communications
ISSN:1932-4553, 1941-0484
Online Access:Get full text
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Summary:Reconfigurable intelligent surface (RIS) is a promising technology for 6 G networks owing to its superior ability to enhance the capacity and coverage of wireless communications by smartly creating a favorable propagation environment. In this paper, we investigate the potential of employing RIS in dual-functional radar-communication (DFRC) systems for improving both radar sensing and communication functionalities. In particular, we consider a RIS-assisted DFRC system in which the multi-antenna base station (BS) simultaneously performs both multi-input multi-output (MIMO) radar sensing and multi-user multi-input single-output (MU-MISO) communications using the same hardware platform. We aim to jointly design the dual-functional transmit waveform and the passive beamforming of RIS to maximize the radar output signal-to-interference-plus-noise ratio (SINR) achieved by space-time adaptive processing (STAP), while satisfying the communication quality-of-service (QoS) requirement under one of three metrics, the constant-modulus constraint on the transmit waveform, and the unit-modulus constraint of RIS reflecting coefficients. An efficient algorithm framework based on the alternative direction method of multipliers (ADMM) and majorization-minimization (MM) methods is developed to solve the complicated non-convex optimization problem. Simulation results verify the advancement of the proposed RIS-assisted DRFC scheme and the effectiveness of the developed ADMM-MM-based joint transmit waveform and passive beamforming design algorithm.
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ISSN:1932-4553
1941-0484
DOI:10.1109/JSTSP.2022.3172788