一种车载通信设备电磁兼容性预测方法

An EMC Prediction Method of Vehicular Communication Equipment

随着作战信息化水平不断提高,车载通信设备越来越多,车内电磁环境愈发复杂,对车载通信设备进行电磁兼容性预测十分重要。文中提出了一种车载通信设备电磁兼容性筛选预测方法,该方法在计算干扰余量时考虑了不同干扰源的互调和干扰量的叠加,选取关键指标对通信设备受扰后的性能进行了分析。该预测方法对车载发射机依次进行快速筛选、幅度筛选、频率筛选、详细计算和性能分析,给出车载接收机的受扰情况。在预测实例中,所评估接收机的干扰余量为9.4 dB,话音清晰度降低了36%,通信距离减小了43.7%,误码率为4.2×10^(-3),受扰预测结果贴合实际情况。

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.The disturbed prediction results are in line with the actual situation.