基于MI模型的自适应译码协作通信方案

针对传统译码转发协作通信系统中,中继节点译码成功后转发固定长度码字导致无线资源利用率较低的问题,本文在准确预知信道状况的基础上,利用互信息模型,提出了一种自适应调节转发码字码长的译码转发算法,在满足系统误码率要求的前提下,本算法能以最短码长转发码字,从而使无线资源的利用率最大化。理论分析和仿真结果表明,在信噪比相同,且满足给定误码率条件下,本算法与传统译码转发算法相比能更加有效的利用无线资源。

Adaptive decode-and-forward user cooperation scheme based on the mutual information model

A novel decode-and-forward(DF) algorithm of adjusting and transmitting the code length adaptively based on the mutual information model is proposed to deal with the problem that the utilization ratio of the wireless resources is poor in the DF user cooperation system,of which is resulted by transmitting the fixed code length after the relay node decoded successfully.The new algorithm can maximize the efficiency of wireless resources on the premise of contenting the error rate require of the system.Simulation results verify that the wireless resources are used more efficiently according to the new scheme with the same channel state and the given error rate.