Performance analysis of multiuser MIMO broadcast channel based on LQ decomposition

In this paper, precoder design using LQ decomposition combined with dirty paper coding (DPC) is proposed to improve the throughput of multiuser multiple-input multiple-output (MU-MIMO) broadcast channel. The performance of MU-MIMO broadcast channel of proposed precoder is compared with SVD decomposition method, with the assumption that perfect channel state information (CSI) is available at both the transmitter and receiver. Simulation results are discussed to evaluate the performance of LQ decomposition method, which illustrate that the proposed system outperforms the conventional SVD based decomposition methods.