Space-Time-Frequency Diversity Hybrid ARQ for MIMO-OFDM Systems

MIMO-OFDM is a promising technology for supporting high data rate communication. Meanwhile, HARQ is known as an effective method to ensure highly reliable communications. The challenges on HARQ for MIMO-OFDM systems lie on coping with multidimensional resource and large feedback. In this paper, one space-time-frequency diversity HARQ is proposed to explore the multidimensional resource efficiently. Moreover, its subcarrier grouping scheme is proposed to reduce the feedback information size. Simulation results demonstrate that compared with the conventional HARQ schemes, the proposed schemes show lower packet error rate and higher throughput on the same condition of feedback information size