Signal detection enhancement in LTE-A downlink physical layer using OSIC-based KK-Best algorithm

In this paper, the performance of LTE-A downlink physical layer with MIMO detection techniques is presented. We propose a scalable and near optimum OSIC-based KK-Best algorithm with higher performance. The proposed OSIC-based KK-Best algorithm is characterized by low complexity by dividing a large MIMO detection problem into small sub-problems. The proposed algorithm is divided into several basic building blocks with small dimension to reduce complexity. This algorithm utilizes the KK-Best algorithm for first data stream with high SINR, and then applies an OSIC-MMSE to detect the other data streams. This paper investigates the performance of the proposed algorithm and compares its performance with the other algorithms. The performance of the proposed algorithm is mathematically illustrated and evaluated by calculating the BER for a certain range of SNRs with different antennas cases. Simulation results show that the proposed algorithm provides a better performance and gives low BER values. Finally, the OSIC-based KK-Best algorithm enhances the performance of the LTE-A downlink physical layer.