面向能量收集的编码协作系统性能与码的设计研究  

Performance analysis and codes design of coded cooperation with energy harvesting

作　　者：张顺外[1] 仰枫帆[2] 宋荣方[1] 

机构地区：[1]南京邮电大学通信与信息工程学院,江苏南京210003 [2]南京航空航天大学电子信息工程学院,江苏南京210016

出　　处：《系统工程与电子技术》2016年第12期2863-2868,共6页Systems Engineering and Electronics

基　　金：国家自然科学基金(61271234;61501256);江苏省自然科学基金(BK20150857);中国博士后科学基金(2014M561694);南京邮电大学引进人才科研启动基金(214007)资助课题

摘　　要：为解决编码协作系统中继节点的能量受限问题,研究了面向能量收集的编码协作系统。首先,提出了面向能量收集的重复积累(repeat-accumulate,RA)编码协作方案,分析了系统的中断概率;其次,推导出了对应于信源节点与协作中继采用的RA码的联合校验矩阵,并通过联合设计,消除了该矩阵中所有两种类型的girth-4环。理论分析与仿真结果表明,与传统非能量收集的点对点系统比,所提方案大大降低了系统中断概率。与采用随机低密度奇偶检验码(low density parity-check,LDPC)码的编码协作方案相比,采用联合设计RA码的系统误码性能更为优越。In order to break through the energy limitation of the relay in the coded cooperation system, a co- ded cooperation scheme with the energy harvesting is investigated. Firstly, a repeat-accumulate （RA）-coded co- operation with energy harvesting is proposed, and the outage probability of the system is further analyzed. Then, the joint parity-check matrix corresponding to the RA codes employed by the source and relay is deduced. By jointly design the joint parity-check matrix, all the two types of girth-4 cycles in it are cancelled. Theoretical analysis and numerical simulations show that the proposed scheme sharply lowers the outage probability com- pared with the traditional point to point system under the same power condition. Furthermore, the bit error rate of the system employing jointly the designed RA codes is better than that of random LDPC codes.

关 键 词：编码协作 能量收集 RA码 联合校验矩阵 girth-4环 

分 类 号：TN911[电子电信—通信与信息系统]