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为了提高增强型放大转发协同通信系统的性能,对协同中继协议进行了研究,提出了基于竞争策略和自动请求重传机制的增强型放大转发协议.该协议在3节点协同通信系统的基础上通过目的节点的反馈信息对信道进行估计,当直传不成功时,利用源节点与中继节点的竞争来确定转发方式.详细推导了该协议的中断概率闭式结果,给出了高信噪比时的中断概率近似表达,并在此基础上给出了分集复用折中和协同增益.理论分析和数值仿真结果表明,所提出的放大转发协议选择最优的转发方式,能有效改善系统的中断性能.
In order to improve the performance of enhanced amplification and forwarding cooperative communication system, the cooperative relay protocol is studied, and an enhanced amplification and forwarding protocol based on competitive strategy and automatic request retransmission mechanism is proposed.This protocol is based on the 3-node cooperative communication system The channel is estimated by the feedback information of the destination node, and when the direct pass is unsuccessful, the forwarding mode is determined by the competition between the source node and the relay node.The closed probability of the protocol is deduced in detail, and the high SNR The approximate expression of the outage probability is given, and then the diversity multiplexing compromise and the collaborative gain are given. The theoretical analysis and numerical simulation results show that the proposed forwarding protocol of amplification and forwarding protocol can effectively improve the performance of the system Interrupt performance.