Joint Optimization of Cooperative Beamforming and Relay Assignment in Multi-User Wireless Relay Networks

摘要: This paper considers joint optimization of cooper- ative beamforming and relay assignment for multi-user multi- wireless networks to maximize the minimum received signal-to-interference-plus-noise ratios (SINR). Separated contin- uous binary already pose very challenging programs. Cer- tainly, their optimization, which involves nonconvex objec- tives coupled constraints in continuous variables, is among most problems. Even conventional relaxation by box still computationally intractable because relaxed program highly nonconvex. However, it shown this that programs fit well d.c. (difference two convex functions/sets) framework. Efficient algorithms are then developed both cases orthogonal nonorthogonal transmission multiple users. Simulation results show jointly optimized not only save bandwidth but can also maintain network SINRs.