Achieving Maximum Weighted Sum-Rate in Multicell Downlink MISO Systems

作者：Zhang, Qian^*; He, Chen; Jiang, Lingge

来源：IEEE Communications Letters, 2012, 16(11): 1808-1811.

DOI：10.1109/LCOMM.2012.092812.121644

• Monotonic optimization
• weighted sum-rate maximization
• multicell MISO system
• achievable rate region

This paper considers the maximization of the weighted sum-rate (WSR) in multicell downlink multiple-input single-output (MISO) systems. The problem is non-convex and thus cannot be solved directly via conventional convex optimization methods. To achieve global optimality, we propose a novel monotonic optimization approach where a sensible search scheme first checks the feasibility of a chosen point and then utilizes a sequential partition method at each iteration to reduce the total number of feasibility evaluations. Besides, another relocating procedure also accelerates the convergence. Simulation results verify the improved convergence performance of the proposed approach compared with the previously proposed outer polyblock approximation algorithm and the branch-reduce-and-bound algorithm.

• 出版日期2012-11
• 单位上海交通大学