Digital Design of Electromagnetic Compatibility Test Receiver Based on MATLAB Modeling
With the rapid development of virtual instruments,this paper studies how to apply the advantages of cus-tomization,scalability and low cost of virtual instruments to the receiver of electromagnetic compatibility testing.By partially or even completely replacing traditional instruments with digital virtual instruments,it has become the focus of future electromagnetic compatibility technology innovation.A receiver model is built based on MATLAB software,and the digital design of the receiver is realized.The filter window function of the IF filter adopts Gaussian func-tion,and the bandwidth is fitted by the correction coefficient.The geophone is transformed by Fourier transform to re-alize the spectrum calculation and envelope drawing of the signal.The model can achieve peak and average detection effects through the change of frequency selection signal.The error between the actual test results and the model sim-ulation results is less than 10%,which meets the testing requirements of enterprises.The model has strong scalability and compatibility,and can monitor the electromagnetic compatibility problems of the whole vehicle and high and low voltage parts to a certain extent.The design experience is of great significance for the overall digital development of the subsequent electromagnetic compatibility testing process.
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