面向高速移动场景的F-OFDM并行干扰消除技术  

Parallel Interference Cancellation Technology for F-OFDM under High-Speed Mobility Scenario

作　　者：秦伟 胡春静 彭木根[1] 刘喜庆 QIN Wei;HU Chun-jing;PENG Mu-gen;LIU Xi-qing(School of Information and Communication Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China)

机构地区：[1]北京邮电大学信息与通信工程学院,北京100876

出　　处：《北京邮电大学学报》2021年第4期12-18,共7页Journal of Beijing University of Posts and Telecommunications

基　　金：国家青年自然科学基金项目(61901315)。

摘　　要：针对第5代移动通信系统(5G)中复杂的传播环境和高速移动引起的多普勒扩展问题,提出了一种基于滤波正交频分复用(F-OFDM)系统的增强并行干扰消除(PIC)方案,以抑制多普勒扩展导致的严重子载波间干扰。在发送端将数据流分成2个分支,分别经过逆快速傅里叶变换和快速傅里叶变换信号处理模块,在接收端采用等增益合并算法组合两路分支信号,以提高信干比。仿真结果表明,在5G频段的高速移动场景中,所提出的PIC-F-OFDM方案与现有方案相比具有更低的误码率,并能充分利用子带间灵活载波参数配置的优势,满足不同类型业务的通信需求。The complex propagation environment and high-speed mobility of transceivers in the fifth generation of mobile communications system(5G)can cause severe Doppler spread problem.To suppress the severe inter-carrier interference caused by the Doppler spread,an enhanced parallel interference cancellation scheme based on the filtered orthogonal frequency division multiplex(PIC-F-OFDM)system isproposed.In PIC-F-OFDM,the transmitting data stream is splitted into two brancheswhich are then separately fed into the inverse fast Fourier transform and fast Fourier transform modules.The two branches are then combined by the equal gain combining algorithm at the receiver to improve the signal-to-interference ratio.The simulation results show that PIC-F-OFDM achieves a lower bit error rate than the existing schemes in high-speed mobility scenarios under the 5G radio band.Besides,the proposed PIC-F-OFDM scheme can configure the parameters flexibly for each sub-band,which helps to meet the communication requirements of various service.

关 键 词：高速列车通信 多普勒扩展 子载波间干扰 并行干扰消除 

分 类 号：TN911.25[电子电信—通信与信息系统]