车载通信系统电磁干扰余量评估

doi:10.16180/j.cnki.issn1007-7820.2022.04.001

Abstract

Abstract:

With the development of science and technology, the electromagnetic interference in the vehicular communication system becomes more and more obvious. In view of the interference margin assessment of the vehicular communication system, this study proposes a novel evaluation method of electromagnetic interference margin of the vehicular communication system based on four-level screening method. The working conditions, frequency, signal power and communication performance of the vehicular receiver are evaluated respectively to display the disturbed situation and interference margin of the vehicular receiver quantitatively. Aiming at the influence of interference source on receiver sensitivity, the communication distance, signal-to-noise ratio and bit error rate are selected to evaluate the performance of vehicular communication system by this method. The results show that compared with the traditional four-level screening method, this method can more comprehensively reflect the performance changes of communication system with interference.

Key words: electromagnetic interference, vehicular communication system, interference margin, communication performance, receiver sensitivity, communication distance, SNR, BER

CLC Number:

TN97

Jianpeng WAN,Hongmin LU,Guohua LIU,Min LI. EMI Margin Assessment of Vehicular Communication System[J].Electronic Science and Technology, 2022, 35(4): 1-7.

Figures/Tables 12

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References 19

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工作频率/MHz	a/dB	b/dB	标准偏差/dB
<30	-70	-20	10
30~300	-80	-30	15
>300	-60	-40	20

车载通信设备	工作频率 /MHz	带宽 /MHz	灵敏度/dBm	功率 /W
VHF1(发)	33	2	-	30
VHF2(收)	33	2	-116	-
HF3(发)	11	2	-	30
VHF4(发)	65	2	-	30

	传统方法	本文方法
干扰余量	RIM 10.7 dB SIM -90.4 dB	10.7 dB
兼容情况	受到干扰信噪比为7.2 dB	通信距离减小了45.6%,信噪比为7.2 dB,受扰后的误码率为6.1×10^-3
适用性	模拟系统	模拟系统、数字系统

EMI Margin Assessment of Vehicular Communication System

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