[1]李鹏,周忠元,盛明杰,等.外场辐射发射测量中瞬变环境信号的抑制[J].东南大学学报(自然科学版),2019,49(3):582-588.[doi:10.3969/j.issn.1001-0505.2019.03.025]
 Li Peng,Zhou Zhongyuan,Sheng Mingjie,et al.Transient ambient signals suppressing for in-situ radiated emissions measurement[J].Journal of Southeast University (Natural Science Edition),2019,49(3):582-588.[doi:10.3969/j.issn.1001-0505.2019.03.025]
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外场辐射发射测量中瞬变环境信号的抑制()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
49
期数:
2019年第3期
页码:
582-588
栏目:
电气工程
出版日期:
2019-05-20

文章信息/Info

Title:
Transient ambient signals suppressing for in-situ radiated emissions measurement
作者:
李鹏周忠元盛明杰周祺胡鹏
东南大学机械工程学院, 南京 211189
Author(s):
Li Peng Zhou Zhongyuan Sheng Mingjie Zhou Qi Hu Peng
School of Mechanical Engineering, Southeast University, Nanjing 211189, China
关键词:
外场测量 瞬变信号 自适应干扰抵消 时频分析
Keywords:
in-situ measurement transient signals adaptive noise cancellation time-frequency analysis
分类号:
TM931
DOI:
10.3969/j.issn.1001-0505.2019.03.025
摘要:
为了抑制电子设备辐射发射外场测量时环境中的瞬变信号,提出了一种时域频域相结合的测量方法.首先通过时域方法捕捉瞬变环境信号,并使用重叠窗技术避免瞬变环境信号频谱的丢失.然后对瞬变环境信号进行周期延拓,将其变为周期信号,为自适应算法提供足够的采样点数,保证算法的收敛性.最后采用自适应噪声抵消技术实现对瞬变环境信号的抑制.仿真和试验结果表明,无论受试设备辐射信号是连续周期信号还是瞬变信号,所提方法均能够实现对瞬变环境信号40 dB以上的抑制,有效提取受试设备的辐射发射信号,恢复出的辐射信号与其真实值的误差在3 dB以内.在准确测量受试设备辐射发射的同时,所提方法还能够对辐射信号进行时频分析,为设备电磁兼容问题的诊断与整改提供必要的依据.
Abstract:
To suppress the transient ambient signals in in-situ radiated emission measurement of the electronic equipment, a measurement method combining time domain and frequency domain was proposed. First, the transient ambient signals were captured in the time domain, and the overlapping window technique was adopted to avoid the spectrum loss. Then, the transient ambient signals were cyclically extended to be periodic signals, providing sufficient sampling points for the adaptive filtering algorithm to ensure its convergence. Finally, an adaptive noise cancellation technology was used to suppress the transient ambient signals. Simulation and experimental results show that the proposed method can achieve more than 40 dB suppression of the transient ambient signals and obtain the radiated emissions of the equipment under test, they are radiated signals of the equipment under test regardless of continuous periodic signals or transient signals. The error between the recovered radiated signals and their true value is less than 3 dB. While accurately measuring the radiated emissions of the equipment under test, the proposed method can also perform time-frequency analysis on radiated signals, providing a basis for the diagnosis and the rectification of the electromagnetic compatibility problem of the equipment.

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备注/Memo

备注/Memo:
收稿日期: 2018-09-04.
作者简介: 李鹏(1987—),男,博士生; 周忠元(联系人),男,博士,教授,博士生导师,zyzhou@seu.edu.cn.
引用本文: 李鹏,周忠元,盛明杰,等.外场辐射发射测量中瞬变环境信号的抑制[J].东南大学学报(自然科学版),2019,49(3):582-588. DOI:10.3969/j.issn.1001-0505.2019.03.025.
更新日期/Last Update: 2019-05-20