Abstract: An adaptive interleaving model for MIMO-OFDM systems was proposed. This model can better exploit instantaneous channel variation through rearranging transmitted symbols according to quasi-instantaneous channel SNR of the OFDM frame, which was to break up long burst channel error so that overall bit error probability could be reduced. An upper bound of pairwise error probability (PEP) of the systems was investigated. The code gain and diversity gain of the proposed arithmetic were given. Theoretical results show that the major factor affecting the performance of the proposed scheme is SNR, channel order and the number of receive attenna. Simulations indicate that significant SNR can be obtained and the system performance is better than that of single antenna case. Compared with block interleaving in the case of 2Tx2Rx at a 10-2 BER, this adaptive interleaving scheme offers 5dB increase.

Key words: information processing technology, MIMO-OFDM, adaptive interleaving, block interleaving