GPS接收机抗压制干扰性能研究

发布时间：2018-04-01 03:21

本文选题：GPS　切入点：捕获　出处：《电子科技大学》2014年硕士论文

【摘要】：随着GPS在军事和社会生活各个领域的应用越来越广泛,GPS接收机的抗干扰性能越来越受到关注,已成为近几年导航领域技术研究的一个热点问题。但是,目前的研究大多是对接收机正常跟踪状态下的抗干扰性能进行分析,很少涉及捕获状态下的抗干扰性能,分析方法通常是采用对扩频通信抗干扰性能分析的理论进行基于误码率的分析,没有考虑GPS系统与常规扩频通信的差异,并且很少考虑一些影响接收机抗干扰性能的关键设计参数的影响。本文根据GPS系统的特点,针对GPS接收机的抗压制干扰性能做了深入研究。首先对GPS接收机捕获状态的抗干扰性能进行了分析,提出了通过分析扩频码与干扰信号相关性研究捕获状态抗干扰性能的方法。在分析跟踪状态抗干扰性能时,首先讨论了GPS系统区别于常规直扩系统的特性,然后提出了一种基于载波跟踪相位颤动门限、抗干扰门限载噪比和抗干扰门限干信比的抗干扰性能分析方法,详细论述了该方法的理论原理和推导过程,该方法同时考虑干扰信号样式、卫星导航信号体制、接收机预检测积分时间、载波环路带宽等因素对抗干扰性能的影响,并可以进行精确的分析计算,实体GPS接收机抗干扰性能测试结果很好的验证了该方法的正确性。
[Abstract]:With the application of GPS in various fields of military and social life, more and more attention has been paid to the anti-jamming performance of GPS receiver, which has become a hot issue in the field of navigation technology in recent years. At present, most of the research is to analyze the anti-jamming performance of the receiver in the normal tracking state, and rarely involves the anti-jamming performance in the acquisition state. The analysis method usually adopts the theory of anti-jamming performance analysis of spread spectrum communication based on bit error rate, and does not consider the difference between GPS system and conventional spread spectrum communication. And the influence of some key design parameters which affect the anti-jamming performance of the receiver is seldom considered. According to the characteristics of GPS system, The anti-suppression jamming performance of GPS receiver is deeply studied. Firstly, the anti-jamming performance of GPS receiver acquisition state is analyzed. This paper presents a method to study the performance of acquisition state anti-jamming by analyzing the correlation between spread spectrum code and interference signal. When analyzing the anti-jamming performance of tracking state, the characteristics of GPS system are discussed, which are different from those of conventional direct spread spectrum (DSSS) system. Then, a method for analyzing the anti-jamming performance based on carrier tracking phase tremor threshold, anti-jamming threshold carrier noise ratio and anti-interference threshold dry signal ratio is proposed. The theoretical principle and derivation process of this method are discussed in detail. This method also takes into account the interference signal pattern, satellite navigation signal system, receiver pre-detection integration time, carrier loop bandwidth and other factors on the anti-jamming performance, and can be accurately analyzed and calculated. The anti-jamming performance test results of solid GPS receiver verify the correctness of the method.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P228.4

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