关键词: 无线组播网络，协作通信技术，功率优化分配，再生中继

Abstract: Aiming at all related issues between system performance of wireless regenerative relaying networks and system frame error probability, outage probability, based on the Multi-user Diversity-cooperative Protocol(MDP) of cooperative communication technology, a new type of transmission scheme(MDPTS) was designed, which optimizes the signal transmission process and enhances both signal transmission efficiency and network throughput. On this basis,the minimum SFEP(System Frame Error Probability) was set as target, and the optimal power allocation scheme between the source and the relay was proposed, the optimal solution of system power allocation was obtained by Lagrange multiplier method. Simulation results show that compared with the network using traditional transmission scheme, the network adopting MDPTS possesses higher diversity gain and multiplexing gain, therefore, has better system performance.

Key words: Wireless multicast networks, Cooperative communication technology, Optimal power allocation, Regenerative relaying