《计算机应用研究》|Application Research of Computers

基于并行干扰抵消的UFMC系统信道均衡

UFMC system channel equalization based on parallel interference cancellation

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作者 余翔,高燕妮,段思睿
机构 重庆邮电大学,重庆 400065
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文章编号 1001-3695(2019)08-054-2496-04
DOI 10.19734/j.issn.1001-3695.2018.03.0112
摘要 通用滤波多载波(UFMC)技术作为5G的一种候选波形,传输中不加循环冗余(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)。针对该问题,提出一种基于并行干扰抵消的均衡算法。首先,根据分析得到多径信道下UFMC系统干扰数学表达式;其次,在采用迫零均衡后,对可靠区间外的数据,根据剩余干扰表达式,近似重构相邻载波及符号间干扰;最后,对各载波并行地进行迭代干扰抵消。通过仿真实验表明,在多径信道下,该算法能够在一定程度上降低误码率,提高UFMC系统性能。
关键词 通用滤波多载波; 符号间干扰; 载波间干扰; 迫零均衡; 并行干扰抵消
基金项目 国家科技重大专项资助项目(2017ZX03001004-004)
本文URL http://www.arocmag.com/article/01-2019-08-054.html
英文标题 UFMC system channel equalization based on parallel interference cancellation
作者英文名 Yu Xiang, Gao Yanni, Duan Sirui
机构英文名 Chongqing University of Posts & Telecommunications,Chongqing 400065,China
英文摘要 Universal filtered multi-carrier(UFMC) technology is a candidate for 5G, without cyclic redundancy(CP) in transmission and inter-symbol interference(ISI) and inter-carrier interference(ICI) will occur under multi-path fading channels. To solve this problem, this paper proposed an equalization algorithm based on parallel interference cancellation. Firstly, according to the analysis, it obtained the mathematical expression of UFMC system interference under multi-path channel. Secondly, after using zero-forcing equalization, it used the data outside the reliable interval to approximate the reconstruction of adjacent carriers and inter-symbol interference according to the residual interference expression. Finally, it applied iterative interference cancellation to each carrier in parallel. Simulation experiments show that under multipath channel, the algorithm can reduce the bit error rate to a certain extent and improve the UFMC system performance.
英文关键词 UFMC; inter-symbol interference; inter-carrier interference; zero-forcing equalization; parallel interference cancellation
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收稿日期 2018/3/6
修回日期 2018/4/17
页码 2496-2499,2503
中图分类号 TN919
文献标志码 A