Near optimal scheme for diversity-multiplexing switched MIMO systems

A novel switched scheme is proposed for diversity-multiplexing switched multiple-input multiple-output (D-M MIMO) system under Raleigh fading based on bit error rate (BER). The proposed scheme is a closed-loop multiple antenna system, and the tradeoff between the diversity and multiplexing gains that can be simultaneously achieved over a low-rate limited feedback channel. Furthermore, based on the optimal decision criterion, a suboptimal algorithm is proposed. Compared with the traditional algorithms, the proposed algorithm has much lower computational complexity, improves the performance of the receivers, achieves good performance close to the optimal algorithm, and is convenient for application. Simulation results demonstrate that the proposed decision algorithm achieves excellent performance.