基于主被动波束成形联合优化的双RIS辅助抗干扰通信方法

Double-RIS assisted anti-jamming communication method based on joint active and passive beamforming optimization

针对双可重构智能表面(RIS)辅助的无线通信系统,提出了基于主被动波束成形联合优化的抗干扰通信方法。以接收信干噪比最大化为目标,构建主被动波束成形的联合优化问题。基于交替优化算法,将联合优化问题分解为3个子问题来迭代求解。通过半定松弛算法求解各RIS的近似最优被动反射向量;基于广义瑞利商求解基站的最优主动波束成形向量。仿真结果表明,所提方法优于传统的单RIS辅助抗干扰通信方法。

For double-reconfigurable intelligent surface(RIS)assisted wireless communication system,an anti-jamming communication method based on joint active and passive beamforming optimization was proposed.In order to maximize the received signal-to-interference-and-noise ratio(SINR),a joint active and passive beamforming optimization problem was formulated.By using the alternating optimization(AO)algorithm,the formulated joint optimization problem was di-vided into three subproblems,which were solved iteratively in an alternating manner.Specifically,the quasi-optimal pas-sive beamforming vector of each RIS was obtained by applying the semidefinite relaxation(SDR)algorithm,and the op-timal active beamforming vector of the BS was obtained based on the generalized Rayleigh quotient.Simulation results demonstrate that the proposed method outperforms the traditional single-RIS ant-jamming communication methods.