UFMC系统中基于MMSE-DFE的均衡器设计  

Design of equalizer based on MMSE-DFE in UFMC system

作　　者：高燕妮 Zhang Qinqin Leng Wei Gao Yanni;Zhang Qinqin;Leng Wei(Sichuan Vocational and Technical College of Posts and Telecommunications,Chengdu 610067,China)

机构地区：[1]四川邮电职业技术学院,四川成都610067

出　　处：《无线互联科技》2023年第14期8-11,共4页Wireless Internet Technology

摘　　要：通用滤波多载波(Universal Filtered Multi-carrier Technique, UFMC)作为一种新型多载波技术,采用子带滤波的方式抑制带外辐射、实现宽松同步,能够更好地适应机器通信中短小数据包的传输。UFMC系统未引入循环前缀(Cyclic Prefix, CP),在多径衰落信道中会产生符号间干扰(Inter Symbol Interference, ISI)和子载波间干扰(Inter-Carrier Interference, ICI),必须设计相应的均衡器来抑制干扰。文章在分析多径信道下UFMC系统干扰的基础上,通过采用判决反馈(Decision Feedback, DF)抑制时域ISI,根据最小均方误差(Minimum Mean Squared Error, MMSE)准则减小ICI以及噪声的影响。仿真验证证明文章研究方法在UFMC中的应用能够很好地抑制干扰,降低误码率。As a new multicarrier technology,the Universal filtered multi carrier(UFMC)technique can reduce out of band radiation,achieve loose synchronization by sub-band filtering,it more efficiently support short burst packet transmission in the machine type communication.The UFMC system does not introduce cyclic prefix(CP),which will generate inter symbol interference(ISI)and inter-carrier interference(ICI)in multipath fading channels.The corresponding balancer must be designed to suppress the interference.On the basis of analyzing the UFMC system interference in multipath fading channels,this article uses decision feedback(DF)to suppress time domain ISI,and reduce the impact of ICI and noise according to the minimum mean squared error(MMSE)criterion.The simulation results show that this method can be applied to UFMC to suppress interference and reduce bit error rate.

关 键 词：通用滤波多载波 符号间干扰 载波间干扰 判决反馈均衡 最小均方误差 

分 类 号：TN929.5[电子电信—通信与信息系统]