多径信道下UFMC系统的信道估计  

Channel estimation of UFMC system in multipath channel

作　　者：余翔[1] 高燕妮 段思睿[1] YU Xiang;GAO Yanni;DUAN Sirui(Chongqing University of Posts and Telecommunications, Chongqing 400065, Chin)

机构地区：[1]重庆邮电大学,重庆400065

出　　处：《电信科学》2018年第4期22-30,共9页Telecommunications Science

基　　金：国家科技重大专项基金资助项目(No.2017ZX03001004-004)~~

摘　　要：通用滤波多载波(UFMC)技术作为5G的一种候选波形,能够抑制带外辐射、实现宽松同步并且很好地支持物联网中短的突发分组传输。但在UFMC传输中不加循环前缀(CP),多径衰落信道下会产生符号间干扰(ISI)以及子载波间干扰(ICI),在信道估计时会影响估计精度。首先分析了多径信道下UFMC系统接收端的干扰情况,在采用反馈均衡抑制ISI后,根据相邻载波间干扰相近的特性,采用自消除算法抑制ICI,并且根据UFMC系统设计导频系数。最后仿真对比了不同多径时延下UFMC系统与CP-OFDM系统信道估计以及误码率性能,通过仿真验证,提出的导频设计方法应用到UFMC中能够很好地抑制干扰,提高估计精度,降低误码率。As a candidate waveform of 5 G, universal filter multi-carrier（UFMC） technology could inhibit out-of-band radiation, achieve loose synchronization and well support the short bursts of things in the transmission. However, in the UFMC transmission without cyclic prefix（CP）, inter-symbol interference（ISI） and subcarrier interference（ICI） are generated in the multipath fading channel, which will affect the estimation accuracy in channel estimation. The interference of the UFMC system in multipath channel was firstly analyzed. After using the feedback equalization suppression ISI, the self-elimination algorithm was used to suppress the ICI according to the similarity between adjacent carriers, and the pilot coefficients were designed according to the UFMC system. Finally, the simulation results show that the proposed method applied to the UFMC can suppress the interference, improve the accuracy and reduce the bit error rate.

关 键 词：通用滤波多载波 符号间干扰 载波间干扰 导频设计 信道估计 

分 类 号：TN919[电子电信—通信与信息系统]