【作者】 王旭东；

【导师】 柳晓鸣；

【作者基本信息】 大连海事大学 ， 通信与信息系统， 2005， 硕士

【摘要】 软件无线电(SDR)是指在简单通用的硬件平台上,通过可升级、可重配置的应用软件实现各种无线电功能。软件无线电使得无线通信系统具有很好的通用性和灵活性,使系统的互联和升级非常方便。因此软件无线电理论的应用前景是非常广阔的。 目前,诸多学者不断探索研究着软件无线电理论在各个领域中的应用,但是对其在VTS(船舶交通管理系统)中的应用研究几乎还是空白。针对这一点,本论文以软件无线电理论为基础,对其在VTS系统的应用进行研究。所作的研究成果如下: 1.根据VTS系统的组成、结构,分析研究了软件无线电理论在VTS雷达子系 统用于数字接收机、数字频率源、数字波形产生和智能天线等中各种系统 的原理、结构及特点。阐述了软件无线电理论应用于VHF子系统中的思想 及优点,从而在VTS系统的宏观结构上论述了软件无线电的在VTS中的应 用。 2.以软件无线电理论为基础,应用MATLAB软件进行仿真实验,对不同带 宽的雷达信号的中频采样的波形及频谱分析比较,在实验中说明了软件无 线电的中频采样理论在雷达中的应用是可行的,并提出了应用条件。 本文的研究结果表明了应用软件无线电理论对雷达信号进行中频采样是可行的,也说明了软件无线电在VTS子系统的应用是可行的,进而证明了软件无线电理论在VTS系统应用是可行的。本文所做的工作对开展软件无线电的应用研究具有一定的参考价值。更多还原

【Abstract】 SDR(Software Defined Radio)defines that on the simple and general hardware platform, varies radio applications can be implemented by using the software which can be updated and reconfigured. SDR can make the wireless communication system have a good flexibility and generality. Also, the interlinkage and update of the system will be very convenient. So the prospect of application of SDR will be glorious.At present, many scholars are exploring the application of SDR in every field. But seldom explores the application in VTS. So this thesis studied the application in VTS based on SDR theory. The main research fruits in this thesis are constituted by several fractions as follow:1. The thesis analyzed and studied the theory, structure and characteristic of all the system about radar digital receiver, digital frequency reference source, digital wave produce and smart antenna where SDR can be applied in radar subsystem of VTS. The thesis expatiated on the idea and advantage when SDR theory is applied in VHF subsystem. Consequently application of SDR in VTS was addressed in macroscopical structure of VTS.2. A mass of simulate experiments were done based on SDR theory. According to analyze and compare vase different wave and spectrum of intermediate frequency sample, the application of intermediate frequency sample of SDR in radar is feasible, put forward application precondition.The results of this thesis reveal that the application of intermediate frequency sample of SDR in radar is feasible, accordingly the application of SDR in VTS is reasonable. It can provide some reference worth to develop the application research of SDR.更多还原