基于网络编码和中继选择的无码率协作传输  

Rateless cooperative transmission based on network coding and relay selection

作　　者：祝开艳[1,2] 王洪玉[1] 孙文珠[1] 

机构地区：[1]大连理工大学电子信息与电气工程学部,辽宁大连116024 [2]大连海洋大学信息工程学院,辽宁大连116023

出　　处：《系统工程与电子技术》2013年第11期2439-2444,共6页Systems Engineering and Electronics

基　　金：国家自然科学基金(61172058)资助课题

摘　　要：高频谱利用率的协作中继传输设计,是协作通信领域的一个研究难点。针对这一问题,结合网络编码和中继选择协作,提出了一种新的无码率中继协作传输方案。在传输当前消息块的同时允许传输下个消息块的部分信息,从而减少所需的传输次数,提高频谱效率。将准静态瑞利衰落信道等效成相应的删除信道,分析了目的节点译码所需传输次数的概率质量函数和平均传输次数,并与其他无码率传输方案进行了性能比较。理论分析和仿真结果表明,采用网络编码和中继选择的无率传输系统在传输次数上进一步改善系统性能。Cooperative relay transmission design with high spectral efficiency is a chanllege in the field of co- operative communications. Based on network coding and relay selection cooperation, a transmission strategy of fountain codes over cooperative relay networkds. This technique allows partial information about the upcoming message block to be transmitted during the current block transmission, hence reducing the required number of transmission and improving the spectral efficiency. Converting the quasi static Rayleigh fading channel into its equivalent erasure channel, the probability mass function of the required number of transmission for decoding is analyzed and compared with other rateless transmission schemes. A numerical analysis highlighting the advan rage of the proposed scheme is presented.

关 键 词：协作通信 网络编码 数字喷泉码 中继选择 瑞利衰落信道 

分 类 号：TN925[电子电信—通信与信息系统]