本文選題：GPS　切入點：捕獲　出處：《電子科技大學(xué)》2014年碩士論文

【摘要】：隨著GPS在軍事和社會生活各個領(lǐng)域的應(yīng)用越來越廣泛,GPS接收機(jī)的抗干擾性能越來越受到關(guān)注,已成為近幾年導(dǎo)航領(lǐng)域技術(shù)研究的一個熱點問題。但是,目前的研究大多是對接收機(jī)正常跟蹤狀態(tài)下的抗干擾性能進(jìn)行分析,很少涉及捕獲狀態(tài)下的抗干擾性能,分析方法通常是采用對擴(kuò)頻通信抗干擾性能分析的理論進(jìn)行基于誤碼率的分析,沒有考慮GPS系統(tǒng)與常規(guī)擴(kuò)頻通信的差異,并且很少考慮一些影響接收機(jī)抗干擾性能的關(guān)鍵設(shè)計參數(shù)的影響。本文根據(jù)GPS系統(tǒng)的特點,針對GPS接收機(jī)的抗壓制干擾性能做了深入研究。首先對GPS接收機(jī)捕獲狀態(tài)的抗干擾性能進(jìn)行了分析,提出了通過分析擴(kuò)頻碼與干擾信號相關(guān)性研究捕獲狀態(tài)抗干擾性能的方法。在分析跟蹤狀態(tài)抗干擾性能時,首先討論了GPS系統(tǒng)區(qū)別于常規(guī)直擴(kuò)系統(tǒng)的特性,然后提出了一種基于載波跟蹤相位顫動門限、抗干擾門限載噪比和抗干擾門限干信比的抗干擾性能分析方法,詳細(xì)論述了該方法的理論原理和推導(dǎo)過程,該方法同時考慮干擾信號樣式、衛(wèi)星導(dǎo)航信號體制、接收機(jī)預(yù)檢測積分時間、載波環(huán)路帶寬等因素對抗干擾性能的影響,并可以進(jìn)行精確的分析計算,實體GPS接收機(jī)抗干擾性能測試結(jié)果很好的驗證了該方法的正確性。
[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.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：P228.4

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相關(guān)期刊論文 前2條

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2 梁高波;陳軍;王大明;;GPS/SINS組合的抗干擾性能分析[J];無線電工程;2006年10期

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本文編號：1693743