TY - GEN
T1 - Joint Active and Passive Beamforming for NLOS Target Detection in RIS-Assisted Mono-Static Radar
AU - Zeng, Cengcang
AU - Liang, Yifan
AU - Li, Hongbin
N1 - Publisher Copyright:
© 2024 IEEE.
PY - 2024
Y1 - 2024
N2 - Reconfigurable intelligent surfaces (RIS) have gained widespread application in the field of communications and are gradually extending their utility to the radar domain. This paper focuses on a mono-static RIS-assisted radar system. The problem is to jointly design the active beamformer for the radar and passive beamformer for the RIS. We begin by introducing a general signal model. In order to enhance target illumination and echo reception, we maximize the received signal power through the optimization of both the radar beamformer and the phase-shift matrix for the RIS. We provide a closed-form solution for the resulting optimization problem. The proposed RIS-assisted radar is employed for non-line-of sight (NLOS) target detection, where the radar is obstructed from the target. A statistical analysis of the detection performance is presented. Simulation results underscore the significant impact of RIS size and radar-RIS distance on detection performance. Moreover, we demonstrate that RIS can offer a practical solution for NLOS target detection.
AB - Reconfigurable intelligent surfaces (RIS) have gained widespread application in the field of communications and are gradually extending their utility to the radar domain. This paper focuses on a mono-static RIS-assisted radar system. The problem is to jointly design the active beamformer for the radar and passive beamformer for the RIS. We begin by introducing a general signal model. In order to enhance target illumination and echo reception, we maximize the received signal power through the optimization of both the radar beamformer and the phase-shift matrix for the RIS. We provide a closed-form solution for the resulting optimization problem. The proposed RIS-assisted radar is employed for non-line-of sight (NLOS) target detection, where the radar is obstructed from the target. A statistical analysis of the detection performance is presented. Simulation results underscore the significant impact of RIS size and radar-RIS distance on detection performance. Moreover, we demonstrate that RIS can offer a practical solution for NLOS target detection.
KW - joint active and passive beamforming
KW - Non-line-of-sight (NLOS) target
KW - reconfigurable intelligent surface (RIS)
KW - target detection
UR - https://www.scopus.com/pages/publications/105002689366
UR - https://www.scopus.com/pages/publications/105002689366#tab=citedBy
U2 - 10.1109/IEEECONF60004.2024.10942652
DO - 10.1109/IEEECONF60004.2024.10942652
M3 - Conference contribution
AN - SCOPUS:105002689366
T3 - Conference Record - Asilomar Conference on Signals, Systems and Computers
SP - 1562
EP - 1566
BT - Conference Record of the 58th Asilomar Conference on Signals, Systems and Computers, ACSSC 2024
A2 - Matthews, Michael B.
T2 - 58th Asilomar Conference on Signals, Systems and Computers, ACSSC 2024
Y2 - 27 October 2024 through 30 October 2024
ER -