虚拟暗室系统实验研究
Test Research on the Visual Anechoic Chamber
摘要 讨论了虚拟暗室系统的组成和应用,在此基础上设计了实验在实际中对其背景滤除模式和干扰源定位模式进行了使用,对结果的分析表明:实验中的平均背景滤除强度为 ,随着背景天线与设备天线之间距离的减小,滤除效果变差;当背景中含有强度与设备产生信号强度相当的分量时,背景滤除的效果不理想。因此,背景滤除实质是一种平均滤除,在一些局部分量上会得不到满意的效果。同时,两个天线性能参数等的一致性等因素也会影响到背景滤除的效果。干扰源定位模式可区分同频但不同源的信号,通过比较前后两次相关的结果,不仅可确定设备产生的频谱分量,还可定位干扰源。
关键词 虚拟暗室;测试;背景滤除;干扰源定位
Abstract The application and the parts of the visual anechoic chamber were discussed
A test was designed to make the modes of ambient noise filtering and interference
localization. The results were shown that: the average filtered amplitude in test was
and the effects were influenced by the distance between the device antenna and the
ambient antenna,and may be influenced by the level of their coherence. When
background noise amplitudes were close to that of the signal we concerned, the
filtering effect was not good. The signals generated by different devices but the
frequency is same could be distinguished by through the mode of source localization.
By comparing the correlative result with the former one, the spectrum component of
the device could be achieved and the interference source could be localized.
Keywords visual anechoic chamber, test, ambient cancelled, source localization.
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