基于MI模型的自适应编码协作通信方案

Adaptive coded cooperation user cooperation scheme based on the mutual information model

针对编码协作通信系统中,中继节点重新编码后转发固定冗余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冗余长度码字的编码协作算法,在满足系统误码率要求的前提下,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,本算法能更加有效的利用无线资源。

A novel coded cooperation （CC） algorithm of adjusting and transmitting the code length adaptively 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 successfially. 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 efficiendy according to the new scheme with the same channel state and the given error rate