Performance analysis of an 8 × 8 STBC coded MIMO system for high rate data transfer

The multiple input multiple output (MIMO) antenna transmission system has proved to be highly spectrally efficient. It has also been shown that the capacity of a MIMO channel increases linearly with the number of antennas. Space Time Block Coded (STBC) systems can obtain high diversity order maintaining the high data throughput with a reduced complexity in transceiver configuration. 2 × 2 (Alamouti codes), 4 × 4 and 3 × 4 systems are available in literature supporting the above advantages. Extrapolating the concept of increased MIMO channel capacity with increased number of antennas we analyse an 8 × 8 STBC coded system in this paper. The decision metric for such a system is derived and the performance is alnaysed by varying the constellation complexity of the data modulation. We also present a performance analysis of 8 × 8 STBC system for different modulation schemes.