LDPC编码的自适应放大转发协作通信方案  

Adaptive Amplify and Forward User Cooperation Scheme of LDPC Coding

作　　者：刘焕兵[1] 严晓兰[1] 姜晖[1] 陈翔[1] 

机构地区：[1]解放军电子工程学院信息工程系,安徽合肥230037

出　　处：《电视技术》2012年第15期87-89,119,共4页Video Engineering

基　　金：国家自然科学基金项目(61040007)

摘　　要：针对放大转发协作通信系统中,中继放大功率倍数固定导致系统功率效率较低的问题,提出了一种低密度奇偶校验码(LDPC)编码的自适应调整放大倍数的放大转发算法,在保证一定的误码率要求的前提下,最大化地提高系统功率效率。仿真结果表明,在固定功率放大转发方案和自适应放大转发方案都满足给定误码率的条件下,后者能更加有效地利用系统功率。Because the amplifier gain of relay node is fixed, the efficiency of power is not high for the amplify and forward scheme in user cooperation. An algorithm which can adaptively adjust the gain is presented in this paper. The adaptive scheme improves the utilization ratio of energy in the presence of the reliability requirement. Theoretical analysis and simulation results demonstrate that the adaptive algorithm takes advantage of power more efficiently than the traditional fixed scheme with the given error rate.

关 键 词：用户间协作 放大转发 互信息模型 协作通信 低密度奇偶校验码 

分 类 号：TN911.22[电子电信—通信与信息系统]