Robust Max-Min Energy Efficiency for RIS-Aided HetNets With Distortion Noises - Xu, Yongjun; Xie, Hao; Wu, Qingqing; Huang, Chongwen; Yuen, Chau (IEEE transactions on communications, 2022)
Keywords: Algorithms; Array signal processing; Beamforming; Cellular communication; Energy efficiency; Femtocells; Hardware; hardware impairments; Heterogeneous networks; Interference; Mathematical analysis; max-min fairness; Optimization; Phase shift; RIS; robust beamforming; Robustness; Singular value decomposition; System performance; Uncertainty; Wireless communication