Multi-Beam Massive MIMO Using Robust ICA

Multi-beam massive MIMO configuration has been proposed that utilizes the beam selection with high power in an analog part and blind algorithm such as constant modulus algorithm (CMA) in a digital part. However, when the Least Square-CMA (LS-CMA) is applied to Quadrature Amplitude Modulation (QAM) signal whose amplitude changes, the effect of interference cancellation decreases as higher modulation order [1]. In this paper, the performance in uplink multi-beam massive MIMO is evaluated when applying Robust Independent Component Analysis (Robust ICA) instead of LS-CMA.