A Novel Precoding Selection Algorithm in MIMO Systems

MIMO (Multiple-Input Multiple-out) has drawn most attentions during development of LTE (Long Term Evolution) and LTE-Advanced systems. Precoding is a key technology in MIMO systems and can effectively eliminate the impact of channel correlation. In order to get better throughput and lower complexity in MIMO systems, this paper proposes a precoding selection algorithm based on capacity. Compared with conventional MMSE matrix selection algorithm, proposed selection algorithm reduces the complexity and the amount of cycles in DSP implementation. Simulation results show that the proposed precoding matrix selection algorithm performance is superior to conventional ZF algorithm in different channel environment. It can achieve a good tradeoff between system complexity and performance gain. The authors conclude that the proposed algorithm is the most competitive candidate for MIMO systems.