车载超短波电台受扰程度定量分析与评估

doi:10.16180/j.cnki.issn1007-7820.2022.11.001

摘要/Abstract

摘要：

车载电台作为车载通信系统的核心部件之一,易受车内复杂电磁环境干扰,导致通信质量下降或性能丧失。文中采用试验数据,建立可描述车载电台受干扰程度的量化模型与评估方法,研究了车载电台在车内复杂电磁环境中的受干扰程度。通过分析接收机减敏机理,基于某型号超短波电台试验测试数据,建立了接收机减敏量与天线端口干扰电压的量化模型,并利用所建模型,采用层次分析法提出表征受扰车载电台通信效能的评估方法。实测数据验证表明,文中所建模型具有较高精度,超过85%的测试频点量化误差在6 dB限值内,说明所提出的评估方法具备有效性与可行性。

关键词: 超短波电台, 受扰程度, 减敏, 非线性效应, 通信效能, 层次分析法, 评估, 电磁兼容

Abstract:

As one of the core components of the in-vehicle communication system, the vehicle-mounted radio is susceptible to interference from the complex electromagnetic environment in the vehicle, resulting in a decrease in communication quality or loss of performance. This study uses experimental data to establish a quantitative model and evaluation method that can describe the degree of interference of the vehicle-mounted radio station, and studies the degree of interference of the vehicle-mounted radio station in the complex electromagnetic environment of the vehicle. By analyzing the receiver desensitization mechanism, based on the test data of a certain model of ultrashort wave radio, a quantitative model of receiver desensitization and antenna port interference voltage is established. And using the established model, an evaluation method to characterize the communication performance of the disturbed vehicle radio is proposed using analytic hierarchy process. The experimental data verification shows that the proposed model has high accuracy, and the quantization error of more than 85% of the test frequency points is within the 6 dB limit, indicating that the proposed evaluation method is effective and feasible.

Key words: very high frequency radio, disturbance degree, reduction of sensitivity, non-linear effects, communication efficiency, analytic hierarchy process, evaluation, electromagnetic compatibility

中图分类号:

TN911.4

王雯,路宏敏,张光硕,陈冲冲,张世巍. 车载超短波电台受扰程度定量分析与评估[J]. 电子科技, 2022, 35(11): 1-6.

WANG Wen,LU Hongmin,ZHANG Guangshuo,CHEN Chongchong,ZHANG Shiwei. Quantitative Analysis and Evaluation of the Disturbance Degree of Vehicle-Mounted VHF Radio[J]. Electronic Science and Technology, 2022, 35(11): 1-6.

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评估等级	评估量值
优秀	(0.9,1]
良好	(0.6,0.9]
合格	(0.3,0.6]
不合格	[0,0.3]

指标值	干扰电压1	干扰电压2	干扰电压3
干扰电压幅值	-1.0 dBμV	3.7 dBμV	7.7 dBμV
减敏量	0 dB	5 dB	9 dB
信噪比	12 dB	7 dB	3 dB
清晰度指标	0.64	0.50	0.39
误码率	3.43×10^-5	12.59×10^-3	7.89×10^-2
通信距离	25 km	19 km	15 km

指标值	干扰电压1	干扰电压2	干扰电压3
清晰度指标	1	0.78	0.61
误码率	1	0.43	0.25
通信距离	1	0.76	0.60
评估值	1	0.63	0.45