非正交全双工双向中继系统差错性能分析  

Error Performance of Non-Orthogonal Full-Duplex Two-Way Relaying Systems

作　　者：冯文江[1] 刘国岭[1] 孔乾坤 包涛涛 唐冰蓝 应腾达 FENG Wen-jiang;LIU Guo-ling;KONG Qian-kun;BAO Tao-tao;TANG Bing-lan;YING Teng-da(College of Communication Engineering,Chongqing University,Chongqing 400044,China)

机构地区：[1]重庆大学通信工程学院,重庆400044

出　　处：《电子学报》2018年第6期1397-1403,共7页Acta Electronica Sinica

基　　金：重庆市基础科学与前沿技术研究重点项目(No.cstc2017jcyj BX0047)

摘　　要：全双工(FD)通信方式能够将双向中继(TWR)系统的频谱效率提高一倍,但是解码可靠性受到残留自干扰的恶化.本文研究非正交FD-TWR系统的差错性能.在中继节点自干扰消除性能强于用户节点的条件下,分析成对差错概率在高发射功率区间的渐进表达式,进而导出系统分集增益和编码增益.针对系统编码结构,分析分集增益的可达条件.与频谱效率相同的半双工TWR系统相比,充分抑制自干扰和采用满分集预编码的FD-TWR系统在误比特率为10-3时具有20d B的差错性能优势.The combination of full-duplex（ FD） communication and two-way relaying（ TWR） provides higher spectral efficiency,but the decoding reliability is worsen by residual self-interference（ RSI）. The error performance of non-orthogonal FD-TWR is investigated. With the assumption that the relay has more efficient self-interference cancellation than the user nodes,the diversity and coding gains are derived with the help of the approximate expression of pair-wise error probability in the high transmission power region. Based on the coding structure,the achievability of the diversity gain is analyzed. Compared with the half-duplex TWR system with the same spectral efficiency,the FD-TWR system with suppressed RSI and full-diversity precoder has the superiority of 20 dB on the error performance at the bit error rate of 10-（-3）.

关 键 词：全双工通信 双向中继 残留自干扰 成对差错概率 满分集预编码 协作通信 

分 类 号：TN919.3[电子电信—通信与信息系统]