Systematic design of complex orthogonal space-time block codes with high rates
In this paper, we develop a systematic design method to generate high-rate space-time block codes (STBCs) from complex orthogonal designs for any number of transmit antennas. The resulting complex orthogonal STBCs have the best known rates, which are conjectured "optimal". Two constructions with rates 2/3 and 5/8 are further illustrated for 6 and 7 transmit antennas, respectively.