【作者】 刘王亮；

【导师】 田锦；

【作者基本信息】 西安电子科技大学 ， 机械电子工程， 2009， 硕士

【摘要】 当今各国军队为了适应现代战争的战场环境,力图使其通信系统向集成化、标准化、通用化等方面发展,对于车载通信系统而言更是如此,但是由此带来的电磁兼容(EMC)问题,严重影响了系统的正常工作。因此对车载无线设备间共址干扰进行分析、仿真,对于制定相应的抑制技术具有重要的意义。本文针对车载通信系统最常用的两种工作模式:普通定频,直序扩频(DS)分别进行分析建模。在建立耦合干扰模型的基础上,提出基于测试数据分析车载通信系统共址干扰的方法。在获得了测试数据的基础上,对原始信号进行了预处理。利用小波变换原理对原始信号进行消噪处理,然后借鉴其他学科领域中曲线包络思想提取了发射机特性曲线。最后基于以上分析方法编制了共址干扰耦合分析软件,仿真结果表明该方法更接近实测结果。在本文最后通过分析仿真结果提出了一些抑制共址干扰的措施,对于技术人员、管理者、操作者,以及无线系统的使用者都具有重要的工程应用价值。更多还原

【Abstract】 Nowadays,to adapt to modern battlefield circumstances, army of various countries tries hard to develop its communications system to aspects integration, standardization, universalization and so on ,even to the vehicular communications system. However, the problem which electromagnetic compatibility (EMC) cause influences system work normally. Therefore the analysis and the simulation about altogether site disturbance of the radios that vehicular communications system carry on, have the vital significance to formulate the technology of suppresses.The article explains the two kind of working pattern that commonly used in the vehicular communications system: fixed-frequency, Direct Sequence Spread Spectrum (DSSS). On the foundation of carrying on the analysis models, it establishes analysis about disturbance and coupling of vehicular communication system based on testing. After obtain the testing data, it pretreated the primary signal. Using the theory of wavelet transformation reduce the noise of signal. Then profited from other discipline domain curvature withdraw the characteristic curve of transmitter. Based on above analysis models, compiled the co-site disturbance coupling analysis software. It showed that the simulation results is close to the actual result.Finally, by analyzing the results of simulation, the article gives some suppress measures to reduce the co-site disturbance. So,it provides engineering guidance for technical personnel, the superintendent, the operator, as well as the users of wireless更多还原