A New and Improved Perfect Space-Time Code for 5#x000D7;5 MIMO Channels

摘要

A perfect space-time code can provide the optimal performance in many theoretical and practical aspects. For example, a perfect space-time code can utilize the full coding rate to achieve the maximum throughput of a MIMO channel. The property of non-vanishing determinant provides the optimal tradeoff between spatial diversity and multiplexing. On the practical side, each information symbol can be encoded without the necessity of extra energy. The RF power amplifier can also be simplified based on the uniform average power of transmission over all transmit antennas and time slots. This paper proposes a new perfect space-time code for 5×5 MIMO channels. The new design can yield an improved minimum determinant over QAM.