Interleaved Spatial Diversity Transmission with Coordinate Interleaver for MIMO-OFDM Systems

Multiple input multiple output (MIMO) system provides a promising means to increase the spectral efficiency. Orthogonal frequency division multiplexing (OFDM) allows broadband transmission over frequency selective fading channels. Recently, a coordinate interleaver (CI) is considered in order to maximize the diversity gain for MIMO system. In this paper, a new concept of coordinate interleaver for MIMO-OFDM system and an optimum receiver structure are suggested. Using the CI, the real and imaginary components of signals experience different fading channels and it provides additional diversity gains. Simulation results show that the system employing the proposed CI outperforms the conventional V-BLAST architecture.