基于计算-转发策略的双向中继通信方案  

New Scheme of Two-way Relay Communication Based on Compute-and-Forward

作　　者：王海龙[1] 王钢[1] 闫泽涛 WANG Hailong WANG Gang YAN Zetao(Communication Research Center, Harbin Institute of Technology, Harbin Heilongjiang 150001, China Shenzhen Academy of Aerospace Technology, Shenzhen Guangdong 518057, China)

机构地区：[1]哈尔滨工业大学通信技术研究所,黑龙江哈尔滨150001 [2]深圳航天科技创新研究院,广东深圳518057

出　　处：《无线电通信技术》2016年第6期33-36,44,共5页Radio Communications Technology

基　　金：国家重点基础研究发展计划(2013CB329003)

摘　　要：针对双向中继通信中物理层网络编码的应用,采用基于计算-转发的中继策略,研究并推导了在AWGN信道和衰落信道下的可达速率。为了在衰落信道下获得更高的传输速率,提出了一种采用信道反转预编码的新型传输方案。对比可知,采用这一预编码方案可使通信性能获得较大提升。在两种信道条件下,基于计算-转发的双向中继通信方案都能获得最大自由度,表明计算-转发策略是当前最适于双向中继通信的中继策略。Compute-and-forward-based physical layer network coding （ PNC） scheme is investigated for wireless two-way relay channel.The achievable rates are derived both for AWGN channel and fading channel.To achieve a higher transmission rate for fading channel,a new transmission scheme using channel inversion precoding is proposed.It is revealed that,with the proposed channel-aware precoding scheme, the communication performance can be improved enormously. For two-way relay channel, the scheme based on compute-and-forward can achieve the maximum degree of freedom, which indicates that compute-and-forward is the most suitable relaying scheme for two-way relay channel.

关 键 词：计算-转发 双向中继 物理层网络编码 格码 预编码 

分 类 号：TN919.23[电子电信—通信与信息系统]