基于近场测量的循环平稳电磁干扰源定位

A. Gorbunova, A. Baev, M. Konovalyuk, Y. Kuznetsov
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引用次数: 10

摘要

数字电子设备辐射的随机场近场测量可用于被测设备表面随机电磁干扰源的定位。广义循环平稳(WSCS)随机场在观测平面上的空间分布特征可以通过参考点与所有剩余节点之间的互相关来完成。本文提出的Tikhonov正则化算法与l -曲线方法相结合,对目标平面上的多偶极子模型分布进行了稳定的逆重构。基于模型阶数选择和二维矩阵铅笔算法的参数辨识过程,通过最小二乘拟合给出了WSCS源的几何构型。仿真和测量实验验证了所提出的信号处理干扰源定位算法的选择。
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Localization of cyclostationary EMI sources based on near-field measurements
The near-field measurements of the stochastic fields radiating by digital electronic devices can be used for the localization of the stochastic electromagnetic interference (EMI) sources on the surface of device under test. The characterization of the space distribution for the wide sense cyclostationary (WSCS) stochastic field in the observation plane can be accomplished by a cross correlation between the reference and all remaining knots. The proposed Tikhonov regularization algorithm in conjunction with L-curve method provides a stable inverse reconstruction of the multi-dipole model distribution in the object plane. Parametric identification procedure based on the model order selection and two-dimensional Matrix Pencil Algorithm with subsequent fitting by Minimum Least Square technique gives the geometrical configuration of the WSCS sources. Implemented simulations and measurement experiments verified the choice of the proposed signal processing EMI sources localization algorithm.
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