Multi-relay cooperative communication method and system based on incremental amplification forwarding

The invention relates to a multi-relay cooperative communication method and system based on incremental amplification forwarding. The method comprises the steps of channel estimation and information broadcasting; counting channel state information as an input parameter, and executing calculation according to an optimal relay cooperation set selection method to obtain an optimal relay cooperation set with the minimum system outage probability; the optimal relay cooperation set serves as an input parameter, calculation is executed according to a multi-relay improved power distribution method, and a power distribution result approximately minimizing the system outage probability is obtained; taking the power distribution result as an input parameter, judging whether a relay is required to participate in cooperation, and obtaining a judgment result; receiving destination node information; and estimating an information sequence. According to the method, the optimal relay node set is selected under the condition of