In this paper, the robust transceiver design is investigated for "cell-free" massive MIMO system which is deemed as one of the promising technology for the future mobile communication network. When constructing the optimization problem, different access point (AP) sets are considered for different user equipment (UE) to simulate the true "UE-centric" system. Besides, the idea of interference leakage is used so that the overall optimization problem could be separated into several subproblems that can be carried out in parallel. To make the algorithm more practical, a low complexity robust design is proposed based on alternating direction method of multipliers (ADMM) algorithm. At the end of the paper, it is demonstrated by the simulation that the proposed robust algorithm has better performance than the non-robust design.
Robust Low Complexity Beamforming for Cell-Free Massive MIMO
2020-11-01
830070 byte
Conference paper
Electronic Resource
English