User Selection and Decoding Precedence Based on the Anisotropic Orthogonal Procrustes Analysis for Uplink Multi-User MIMO

The advent of multi-user multiple input multiple output (MU-MIMO) technology enables concurrent transmissions between the access point and user stations. In this paper, we address MU-MIMO with zero-forcing successive interference cancellation (ZF-SIC) decoder in the uplink direction. To maximize the throughput gain while reducing the computational complexity, we propose a novel algorithm consisting of two parts-user selection and decoding precedence. The user selection part exploits the anisotropic orthogonal Procrustes analysis (AOPA) and the decoding precedence part is based on signal-to-noise ratio (SNR). Simulation results show that our algorithm is fast and outperforms existing schemes in terms of sum rate.