关键词: 车载通信设备, 电磁兼容性, 预测方法, 干扰余量, 互调干扰, 话音清晰度, 通信距离, 误码率

Abstract:

With the continuous improvement of the level of combat information, it is more and more complicated of vehicle electromagnetic environment, and the prediction of the electromagnetic compatibility of vehicular communication equipment is of great importance. A method for screening and predicting electromagnetic compatibility of vehicular communication equipment is proposed in this study. This method considers the intermodulation of different interference sources and the superposition of the interference quantity when calculating the interference margin. The key indicator is selected to analyze the performance of the communication equipment. The prediction method performs fast screening, amplitude screening, frequency screening, detailed calculation and performance analysis on the vehicle transmitter in order, and gives the interference situation of the vehicle receiver. In the prediction example, the interference margin of the evaluated receiver is 9.4 dB, the speech intelligibility is reduced by 36%, the communication distance is reduced by 43.7%, and the bit error rate is 4.2×10^-3. The disturbed prediction results are in line with the actual situation.

Key words: vehicular communication equipment, EMC, prediction method, interference margin, intermodulation interference, speech intelligibility, communication distance, BER