乘法运算的模拟网络编码中继方法  

A Multiplication-based Analog Network Coding Relaying Scheme

作　　者：黄学军[1] 朱洪波[1] 

机构地区：[1]南京邮电大学通信与信息工程学院,南京210003

出　　处：《电子与信息学报》2014年第7期1775-1778,共4页Journal of Electronics & Information Technology

基　　金：国家973计划项目(2013CB329005);国家科技重大专项(2012ZX03001008-003;2011ZX03005-004-03);江苏973计划(BK2011027)资助课题

摘　　要：当前无线网络编码中继采用异或运算和叠加运算实现,该文提出一种基于乘法运算的网络编码中继方案。该方案中继节点对接收到的两个源节点信号直接相乘,然后放大转发,从而实现网络编码。与异或运算的网络编码相比,该方案采用模拟技术实现,降低了中继节点网络编码的复杂度;同时该方案将接收信号与本地信号相乘实现网络译码,译码算法比叠加运算的方案简单。理论分析表明该方案的分集增益与未经网络编码的中继系统相同;仿真结果表明,该方案与现有的网络编码中继协作方案性能相当。The current wireless Network Coding Relaying （NCR） is based on XOR operation or superposition operation, this paper proposes an Amplify-and-Forward NCR （AFNCR） cooperative scheme based on the multiplication operation. The relay node realizes the analog network coding by simply mutiplying the two received source signals, then amplifies and forwards it to the destinations. Compared with XOR-based NCR, the scheme is implemented by analog technology, thus the complexity of network coding at relay node is reduced greatly. Moreover, by mutiplying received signals with the local signals to realize the network decoding, its decoding algorithm is simpler than AFNCR. The theoretical analysis shows that its diversity gain is the same as the relay system without network coding. The simulation results show that the scheme gets the comparable performance with the existing NCR.

关 键 词：协作通信 网络编码 双向中继信道 误比特率(BER) 

分 类 号：TN925[电子电信—通信与信息系统]