基于阵列信号处理的新型虚拟暗室测试方法  

Innovative virtual chamber test method based on array signal processing technology

作　　者：卢中昊[1] 林铭团[1] 刘继斌[1] 刘培国[1] 

机构地区：[1]国防科学技术大学电子科学与工程学院,湖南长沙410073

出　　处：《系统工程与电子技术》2013年第10期2021-2026,共6页Systems Engineering and Electronics

基　　金：国家重点基础研究发展计划(973计划)(613138)资助课题

摘　　要：在复杂电磁环境中,如何对电子设备产生的电磁辐射进行准确测量一直是亟待解决的典型工程问题。提出了一种具有环境干扰抑制效果的外场辐射发射测试新方法,不同于传统的基于自适应噪声抵消方式的虚拟暗室测试方法,其采用空间谱估计和自适应宽带波束形成等阵列信号处理方式以实现对环境干扰的空域滤除。计算机仿真以及试验结果证明,所提方法在保证受试设备辐射特性无失真的情况下,能同时有效滤除被测信号中混迭的同频、宽带等不同体制的环境干扰,弥补了虚拟暗室测试技术的不足,提高了外场电磁辐射测量的速度和精度。In the complicated electromagnetic environment, it is still a typical engineering problem deman ding prompt solution to accurately measure the electromagnetic radiation of electrical equipment. A new meas urement method suppressing ambient interference for insitu tests is proposed. Different from the traditional vir tual microwave chamber method based on adaptive noise cancellation technology, in the proposed method, tech nologies in array signal processing, such as spatial spectral estimation and adaptive beam forming are adopted to filter the electromagnetic interference in space domain. Simulation and experimental test simultaneously prove that this measurement method could effectively filter the cochannel interferences and broadband interferences, guaranteeing the distortionfree of radiation characteristic of testing equipment at the same time. This novel method has made up the shortages in virtual chamber technology. The speed and accuracy are significantly im proved for initu electromagnetic radiation tests.

关 键 词：电磁兼容 现场辐射发射测试 环境干扰抑制 阵列信号处理 空域滤波 

分 类 号：TM931[电气工程—电力电子与电力传动]