Analysis and Evaluation of Uncertainty of Electromagnetic Anti-Interference System in Virtual Dark Chamber

In order to extract the radiation signal of the equipment to be measured more accurately in the field test of electromagnetic radiation, in this paper, the virtual dark chamber electromagnetic radiation anti-interference test system based on MVDR (Minimum Variance Distortionless Response) wide beamforming technology and airspace weighted cancellation principle is adopted to deal with the environmental interference. This paper analyzes the detection principle of the system, determining the source of uncertainty in the detection process, classifying and establishing the analysis model of the uncertainty of the system method, and provides a good theoretical basis for determining and reasonably compensating environment and the electromagnetic radiation test to obtain more accurate test results, and optimizes the test process and algorithm model.