车载通信电台间干扰概率预测研究

发布时间：2018-03-31 01:20

本文选题：电磁兼容　切入点：车载通信电台　出处：《西安电子科技大学》2014年硕士论文

【摘要】：随着现代通信技术的发展,车载通信系统上装的电子设备,尤其是无线通信电台的数量日益增加,这就使得电台间的产生的干扰程度越发严重。因此,如何在系统设计阶段,评估预测车载通信电台间的干扰程度,对系统的用频计划及上装设备规模有较为明确的把握成为亟待解决的问题。本文根据车载通信系统电磁兼容研究的需求及通信系统的性能特点,结合电台间的通信原理,针对车载通信系统中电台间的干扰,建立了干扰概率计算模型。首先,在已有车载通信电台间电磁干扰研究的基础上,对共址通信系统与多车车际间通信系统,进行了分析总结。并在基于信纳德(SINAD)模型计算干扰带宽的方法上提出了等效干扰带宽的概念,为电台间干扰概率的计算提供依据。然后,分析了电台间的邻道干扰与谐波干扰的特点,将其从频域上分为同频段干扰与不同频段干扰两种情况,建立了邻道干扰概率模型与谐波干扰概率模型。随后从数学计算的角度出发,分析了邻道与谐波干扰概率计算模型之间的联系,综合考虑两种干扰类型的影响,建立了综合干扰概率计算模型。在各电台的工作状态相互独立且工作频率等概率分布于各自频段内这一假设条件下,将一对一综合干扰概率计算方法扩展至多对一干扰的情况,建立了多对一综合干扰概率模型。并在此基础上,以HF电台与VHF电台间的干扰情况为例进行了仿真分析。最后,在上述分析的基础上,编制了车载通信电台间干扰概率预测分析软件的部分模块,并对软件的总体设计和界面进行了介绍。
[Abstract]:With the development of modern communication technology, the number of electronic equipment installed on vehicle communication system, especially wireless communication stations, is increasing day by day, which makes the interference between stations become more and more serious. To assess and predict the degree of interference between vehicular communication stations, It is an urgent problem to grasp the frequency plan of the system and the scale of the upper equipment. According to the requirements of the electromagnetic compatibility research of the vehicle communication system and the characteristics of the communication system, this paper combines the communication principle between the stations. The interference probability calculation model is established for the interference between the stations in the vehicle communication system. Firstly, on the basis of the research on the electromagnetic interference between the existing vehicle communication stations, the co-address communication system and the multi-vehicle inter-vehicle communication system are studied. The concept of equivalent interference bandwidth is put forward on the basis of the method of calculating interference bandwidth based on SINADM model, which provides the basis for the calculation of interference probability between stations. The characteristics of adjacent channel interference and harmonic interference between radio stations are analyzed, which are divided into two kinds of interference in frequency domain: the same frequency band interference and the different frequency band interference. The probability model of adjacent channel interference and the probability model of harmonic interference are established. Then, from the point of view of mathematical calculation, the relationship between adjacent channel and harmonic interference probability model is analyzed, and the influence of two kinds of interference types is considered synthetically. Under the assumption that the working state of each radio station is independent and the working frequency is distributed in its own frequency band, the one-to-one comprehensive interference probability calculation method is extended to the case of many-to-one interference. A many-to-one comprehensive interference probability model is established. On this basis, the interference between HF radio station and VHF radio station is simulated and analyzed. Finally, based on the above analysis, the interference between HF radio station and VHF radio station is simulated and analyzed. Some modules of the software for prediction and analysis of interference probability between vehicle communication stations are developed, and the overall design and interface of the software are introduced.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN911.4

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