Nakagami-m信道下多播中继系统网络编码性能分析  

Performance analysis of network coding for multicast relay system over Nakagami-m fading channels

作　　者：赵睿[1,2] 杨绿溪[1] 黄永明[1] 

机构地区：[1]东南大学信息科学与工程学院,南京210096 [2]华侨大学信息科学与工程学院,厦门361021

出　　处：《中国科学：信息科学》2011年第12期1483-1494,共12页Scientia Sinica(Informationis)

基　　金：国家重点基础研究发展计划(批准号:2007CB310603);国家自然科学基金(批准号:60902012;61071113);国家科技重大专项(批准号:2011ZX03003-001;2011ZX03003-003);教育部博士点基金(批准号:20090092120013;20100092110010);华侨大学自然科学基金(批准号:10BS208);福建省科技重大专项(批准号:2009HZ0008)资助项目

摘　　要：在Nakagami-m衰落信道下,分析多播中继系统中网络编码的中断概率性能.分别采用复数域网络编码(complex fiel dnetwork coding,CFNC)和放大转发网络编码(amplify-and-forward network coding,AFNC)两种传输策略,推导了高信噪比时的中断概率近似表达式,得到两种传输策略下的系统分集增益均为2m,并通过仿真结果加以验证.仿真结果还表明,CFNC在系统中断概率、和速率和误符号率性能上均优于AFNC和无中继直接传输策略.The outage probability performance of network coding for multicast relay system is analyzed in Nakagami-m fading channels. Two transmission strategies, i.e., complex field network coding （CFNC） and amplify-and-forward network coding （AFNC）, are applied in the system, and the approximate expressions of outage probability are derived at high SNR and the conclusion is reached that the system diversity gains of two transmission strategies are both 2m, as is verified by numerical simulations. Simulation results also show that CFNC can outperform both AFNC and direct transmission without relay in the performances of system outage probability, sum rate and symbol error ratio.

关 键 词：多播中继系统 网络编码 中断概率 分集增益 

分 类 号：TN925[电子电信—通信与信息系统]