A method for differential unitary space-time modulation with high code rate

摘要

As we know, differential unitary space-time modulation suit for the case that there is no channel state information at the receiver. With the increase of the code rate, the production distance between the constellation of the unitary group code decreases rapidly. It will deteriorate the performance of the system. In this article, we introduce the idea of Star-QAM into the conventional unitary space-time modulation, and propose a method for differential unitary space-time modulation with high code rate.