In the face of the high power consumption issue caused by the dense deployment of base stations in cell-free net-works,a wideband cell-free network system with sub-connected active reconfigurable intelligent surface(RIS)was proposed.Firstly,based on the constraints of maximum power consumption at the active RIS,amplification factor,and maximum pow-er consumption at the base station,a joint precoding design problem for the base station and RIS was formulated to maxim-ize the energy efficiency.To solve the non-convex problem,advanced techniques including alternating optimization,block coordinate descent,Lagrange dual reconstruction,and multidimensional complex quadratic transformation were applied to transform the original problem into multiple sub-problems.By iteratively solving each sub-problem,the solutions of the original problem was ultimately obtained.The simulation results validate the effectiveness of the proposed scheme.
关键词
有源可重构智能表面/子连接架构,无蜂窝网络/宽带/能效
Key words
active reconfigurable intelligent surface/sub-connected architecture/cell-free network/wideband/energy ef-ficiency
维普
万方数据