一种车载通信设备电磁兼容性预测方法

doi:10.16180/j.cnki.issn1007-7820.2021.05.002

Abstract

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

CLC Number:

TN97

SONG Bingxin,LU Hongmin,LI Minyue,MENG Xiaojiao,WAN Jianpeng. An EMC Prediction Method of Vehicular Communication Equipment[J].Electronic Science and Technology, 2021, 34(5): 7-12.

Figures/Tables 10

Figure 1.

Table 1

Table 2

BER formula"

调制方式	误码率
2ASK	$12$ erfc( $SNR 4$ )
2FSK	$12$ erfc( $SNR 2$ )
2PSK	$12$ erfc( $SNR$ )
2DPSK	$12$ erfc( $SNR$ )

Table 2

Figure 2.

Table 3

Figure 3.

Figure 4.

Figure 5.

Figure 6.

Figure 7.

References 16

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发射机频率/MHz	A	B
<30	-70	-20
30~300	-80	-30
>300	-60	-40

车载设备	工作频率 /MHz	带宽 /MHz	功率/灵敏度 dBm
发射机A	40	10	40
发射机B	25	10	40
接收机C	120	10	-107
接收机D	200	20	-93

An EMC Prediction Method of Vehicular Communication Equipment

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