文档介绍：本科毕业设计
(2013届)
题目
转发式GPS欺骗干扰机的仿真建模与实现
学院
通信工程学院
专业
信息对抗技术
班级
09083511
学号
09083132
学生姓名
张喜合
指导教师
孙闽红
完成日期
2012年12月
摘要
随着科学技术的进步,GPS系统得到了广泛的应用。有效地利用GPS干扰技术破坏对方的导航系统并实现对己方的有效隐蔽和保护,是GPS技术在军事领域的一个新应用。在众多干扰技术中,转发式干扰有着发射功率低,不需要了解GPS信号伪码结构,实现简单等优点。
本文主要研究GPS转发式干扰原理。在分析了GPS定位原理的基础上,对转发式干扰进行了可行性分析,完成了转发式干扰原理样机的设计与实现,并着重对干扰机的射频电路进行了研究。转发式干扰主要是利用信号的自然延时来实施干扰。因此,干扰信号与导航信号完全相同,只是延迟时间有所不同。另外转发式干扰信号经过功率放大,信号的幅度大于导航信号的幅度,GPS接收机完全有可能捕获到转发后的信号。从而使GPS接收机获得错误的伪距,达不到精确的定位。
本文在第一章和第二章中不仅详细叙述了GPS的发展历程和发展现状,还对它的发展前景做了大致的估计,并简要概括了GPS信号的基本组成。在第三章,主要对干扰机的各部分功能进行细化和进一步的模块化设计,将总体模型分为三个单元,包括:信号接收单元、干扰信号生成单元、干扰信号发送单元。第四章则着重于对仿真的结果进行简要分析和比较,验证理论依据的真实性。
关键字:全球定位系统;转发式干扰;模块化设计,仿真
Abstract
With the development of the technology, The Global Position System has been used new application of GPS technology in the military field is how to destroy enemy Navigation system and enshroud effectively ourselves utilizing the GPS counter the GPS interference technology, the retransmitted jamming has the advantages of low sending power, unawareness of the PRN code structure of GPS signal and simple implementation.
The retransmitted jamming principle is studied in this on the analysis of the GPS position theory, the effect of jamming prototype is studied and every part of the jamming prototype is design and implementation of jamming prototype have been done retransmitted jamming method mainly makes use of signal’s natural delay, so the jamming signal pletely the same as navigating signal,except for the differently delay ,the power of retransmitted jamming signal is greater than the navigation signal,SO GPS receiver will probably receive the jamming signal,which results in it’s getting the false pseudo range and not being position precisely.
At the first and the second chapter ,I not only explain the development history and the developing situation of GPS in detail, but also estimate roughly its development directi