Concatenation-Assisted Symbol-Level Combining Scheme for MIMO Systems with Hybrid ARQ

This paper proposes a new receiver scheme for multiple-input multiple-output (MIMO) systems with hybrid automatic-repeat-request (HARQ). The proposed scheme is proved to have the optimal decoding performance in a sense that all the relevant information is fully used for decoding. Furthermore, it is shown that the proposed scheme has reduced complexity compared to the other optimal receiver scheme. Simulation results under IEEE 802.16e setting with UMTS channel model verify that the proposed receiver scheme achieves the same decoding performance with the other optimal receiver scheme and performs better than other suboptimal receiver schemes.