Adaptive relay selection in cooperative communication based on space time block code

Wireless cooperative communication technology share resources with each other, can get space diversity gain and improve the system transmission performance, so that in recent years it has received the extensive attention of many scholars in the field of wireless communications. In view of the flat fading channel, adaptive relay node selection and transmission strategy based on space time block code under decode forward mode is put forward and closed expressions of average outage probability and bit error rate are given under the Rayleigh channel. This strategy applies the opportunistic relay scheme in collaborative space-time coding system, which can get diversity gain and coding gain. The experiment results show that the proposed relay transmission scheme has better performance than fixed relay node transmission strategy.