【作者】 刘磊；

【导师】 田锦；

【作者基本信息】 西安电子科技大学 ， 机械电子工程， 2010， 硕士

【摘要】 随着车载通信技术及无线电技术的发展,通信车上安装的电台及天线的数量越来越多,天线间的电磁干扰也就愈加严重,由此带来的电磁兼容和频率管理问题越来越突出。本文首先建立了车载通信系统的共址干扰模型,提取干扰功率电平、干扰带宽两类电磁干扰仿真参数,并详细分析了实际系统中影响共址干扰特性的主要因素；针对车载定频系统平台级频率管理的特性与需求,建立了综合平台天线布局因素、收／发信机特性、环境噪声等多个因素影响的共址安全带宽信纳德分析模型,借助于平台特性、收／发信机特性等数据库的支持,形成了共址干扰安全带宽特性曲线族；最终结合车载系统电磁兼容性能和频率管理的特点,实现了频率域(频率间隔)、空间域(耦合度)、能量域(干扰容限)三类参数的关联分析,为平台级频率管理提供了理论依据和为数据库的建立提供了数据支持。最后,利用VC 6.0编写了计算安全带宽的仿真软件,提高了原有计算的准确性。并且利用ACCESS 2003建立了用于共址通信系统频率管理的数据库,为后续的分析和计算提供了数据来源。更多还原

【Abstract】 As the development of the vehicle communication technology and radio technology,a large number of communications equipment is installated in the same vehicle.Because of the increasing number of the effects of electromagnetic interference between antennas and Radio is more severe,and the problem between electromagnetic compatibility and frequency management become increasingly evident.In this paper,firstly on-board system,the electromagnetic interference between the antenna is predicted and evaluated,respectively,in two sizes of the frequency analysis and power predict.Interference conditions for electromagnetic compatibility algorithm is advised,forward the characteristics of information.Further,as the theoretical basis of frequency management,co-site communications interference is studied.frequency management methods is proposed for vehicle communication system,and Sinad mold is established for evaluating systems electromagnetic compatibility,and new formula is derived used to calculate security bandwidth in co-site communication systems.Finally,under the guidance of the above-mentioned theory,simulation software is made to calculate security bandwidth,using VC 6.0 and improving the accuracy of the original calculation.Database is established with the use of ACCESS 2003 in order to evaluat systems electromagnetic compatibility and providing a source of data for subsequent analysis and calculations.更多还原