Principal Component Analysis-Based Block Diagonalization Precoding Algorithm for MU-MIMO System

摘要

This paper designs a new paradigm for the performance improvement in block diagonalization (BD)-based precoding algorithms for multiple-user MIMO (MU-MIMO) systems. Even though various linear precoding algorithms have been found, they are complicated in terms of receiver architecture with decoder. In order to simplify the user equipment (UE), it is necessary to design a receiver without decoder. This is consummated using principal component analysis (PCA). The PCA along with QR decomposition and minimum mean squared error (MMSE) channel inversion helps in performance improvement and avoids the decoder at the receiver system. The principal component is calculated using QR decomposition instead of traditional singular value decomposition (SVD) decomposition to reduce the computational complexity. The simulation result shows that PCA-based precoding algorithm in comparison with the existing algorithm achieves comparatively better sum rate, lower bit error rate (BER) using a simplified receiver.