Active RIS-Aided ISAC Systems: Beamforming Design and Performance Analysis

This paper considers an active reconfigurable intelligent surface (RIS)-aided integrated sensing and communication (ISAC) system. We aim to maximize radar signal-to-interference-plus-noise-ratio (SINR) by jointly optimizing the beamforming matrix at a dual-function radar-communication (DFRC) base station (BS) and the reflecting coefficients at an active RIS subject to the quality of service (QoS) constraints of communication user equipments (UEs) and the transmit power constraints of active RIS and DFRC BS. To tackle the optimization problem, the majorization-minimization (MM) algorithm is applied to address the nonconvex radar SINR objective function, and the resulting quartic problem is solved by developing…

• AV
  Alexander von Humboldt-Stiftung
• NN
  National Natural Science Foundation of China

  Awards: 62331023, 62201137, 62101128
• JS
  Jiangsu Science and Technology Department

  Award: BK20210205
• FR
  Fundamental Research Funds for the Central Universities