摘要
传统差分网络编码在解码转发方式下编码环节繁杂、中继检测复杂度高。基于此,文中提出复数域符号相乘的差分网络编码,并构建了中继检测方法一和中继检测方法二,能显著降低中继的检测和编解码复杂度。同时,将提出的编码方法拓展到多中继协作方式以获取高阶协作分集增益,并得到随机差分空时网络编码,其能获得的分集增益阶数为解码正确的中继个数。仿真实验和理论分析均验证了提出的复数域符号相乘的差分网络编码方法在单中继和多中继协作方式下的有效性。
Under the decoding and forwarding mode,traditional differential network coding schemes involve complicated procedures of detection and re-coding at relay nodes.To solve this issue,a differential network coding scheme with symbol multiplying in complex field is presented.Consequently,two relay detection methods are proposed,which can reduce the detection and recoding complexity significantly at relay nodes.In order to achieve the high order diversity gain,the proposed differential network coding is extended to multi-relay setting.As a result,a differential random space-time network coding scheme is presented,where the cooperative diversity order that can be achieved is equal to the activated relay number.The analysis and simulation results validate the proposed differential network coding schemes in both single-and multi-relay settings.
作者
李民政
丁健
苗春伟
肖海林
LI Minzheng;DING Jian;MIAO Chunwei;XIAO Hailin(School of Computer and Information Security,Guilin University of Electronic Technology,Guilin 541004,China;Guangxi Information Science Research Centre,Guilin 541004,China;Guangxi Key Lab of Trusted Software,Guilin 541004,China)
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2018年第5期1142-1147,共6页
Systems Engineering and Electronics
基金
国家自然科学基金(61362007)
广西信息实验中心(YB1407)
广西可信软件重点实验室(KX201414)资助课题
关键词
差分网络编码
随机空时编码
协作分集
differential network coding
random space time coding
cooperative diversity