【摘要】：全球衛(wèi)星導(dǎo)航系統(tǒng)(GNSS)不僅是關(guān)系國家國防安全的技術(shù)支撐系統(tǒng),同時(shí)也是服務(wù)于民生的重要工具。我國自行研制的“北斗”導(dǎo)航定位系統(tǒng)也在逐步發(fā)展中。建設(shè)具有全球?qū)Ш蕉ㄎ荒芰Φ谋倍沸l(wèi)星導(dǎo)航系統(tǒng)對我國經(jīng)濟(jì)建設(shè)和國防建設(shè)產(chǎn)生著深遠(yuǎn)的影響。北斗二代衛(wèi)星系統(tǒng)是我國獨(dú)立自主研發(fā)的新一代衛(wèi)星導(dǎo)航系統(tǒng)�；鶐盘柼幚硎菍�(dǎo)航收機(jī)的核心部分之一。本論文首先分析了各國全球衛(wèi)星導(dǎo)航系統(tǒng)的發(fā)展情況,并詳細(xì)介紹了北斗二代導(dǎo)航系統(tǒng)的結(jié)構(gòu)、衛(wèi)星信號格式。通過研究多普勒偏移對衛(wèi)星信號接收影響和對常用衛(wèi)星信號捕獲方法的分析,對原有接收機(jī)捕獲算法進(jìn)行改進(jìn)。導(dǎo)航接收機(jī)的跟蹤環(huán)路包括載波跟蹤環(huán)和偽碼跟蹤環(huán)。本文將分別對其進(jìn)行分析與研究。包括載波環(huán)路積分器、載波環(huán)鑒別器、環(huán)路濾波器、以及載波環(huán)的熱噪聲誤差、阿倫方差;碼環(huán)的測量誤差和窄相關(guān)技術(shù)的研究。根據(jù)研究所得出的關(guān)鍵參數(shù)對本課題的跟蹤環(huán)路進(jìn)行設(shè)計(jì)與改進(jìn)。接著本文詳細(xì)介紹了基于FPGA+DSP架構(gòu)的“北斗二代”(B1頻點(diǎn))接收機(jī)的實(shí)現(xiàn)方法。設(shè)計(jì)與實(shí)現(xiàn)了北斗接收機(jī)基帶信號處理的軟件算法,分別對FPGA中的模塊設(shè)計(jì)和DSP中的軟件控制算法流程進(jìn)行了詳細(xì)的介紹,完成了整個(gè)系統(tǒng)的軟件設(shè)計(jì)。與射頻前端設(shè)備及外部天線相連,組成了完整的北斗導(dǎo)航接收機(jī)。在靜態(tài)環(huán)境下對接收機(jī)定位性能進(jìn)行測試。定位結(jié)果表明,靜態(tài)環(huán)境下本課題所研制的北斗接收機(jī)單點(diǎn)定位誤差在10米之內(nèi),基本滿足了北斗開放服務(wù)(Open Service)的定位精度指標(biāo)。在該章結(jié)尾對產(chǎn)生定位誤差的原因進(jìn)行了分析。最后在總結(jié)與展望中回顧整個(gè)論文的研究與實(shí)現(xiàn)過程。并對下一步實(shí)現(xiàn)高精度的多頻多模式的軟件導(dǎo)航接收機(jī)進(jìn)行展望,期盼我國北斗導(dǎo)航定位領(lǐng)域取得更大的突破。
[Abstract]:Global Satellite Navigation system (GNSS) is not only a technical support system related to national defense security, but also an important tool to serve people's livelihood. The Beidou navigation and positioning system developed by our country is also developing step by step. The construction of Beidou satellite navigation system, which has the ability of global navigation and positioning, has a profound influence on China's economic construction and national defense construction. Beidou second generation satellite system is a new generation satellite navigation system independently developed by our country. Baseband signal processing is one of the core parts of navigation receiver. In this paper, the development of global satellite navigation system is analyzed, and the structure of Beidou second generation navigation system and satellite signal format are introduced in detail. By studying the influence of Doppler offset on satellite signal reception and analyzing the common methods of satellite signal acquisition, the original receiver acquisition algorithm is improved. The tracking loop of the navigation receiver includes a carrier tracking loop and a pseudo code tracking loop. This paper will analyze and study it separately. It includes carrier loop integrator, carrier ring discriminator, loop filter, thermal noise error of carrier loop, Aron variance, measurement error of code loop and narrow correlation technique. The tracking loop is designed and improved according to the key parameters. Then this paper introduces the implementation method of "Beidou second Generation" (B1 frequency) receiver based on FPGA DSP architecture. The software algorithm of baseband signal processing in Beidou receiver is designed and implemented. The module design in FPGA and the software control algorithm flow in DSP are introduced in detail, and the software design of the whole system is completed. Connected with RF front end equipment and external antenna, a complete Beidou navigation receiver is formed. The performance of receiver positioning is tested in static environment. The positioning results show that the single point positioning error of the Beidou receiver developed in this paper is less than 10 meters under the static environment, which basically meets the positioning accuracy index of Beidou open service (Open Service). At the end of the chapter, the cause of the positioning error is analyzed. Finally, the research and implementation process of the whole thesis is reviewed in the summary and prospect. The next step is to realize the software navigation receiver with high precision and multi-frequency and multi-mode, in order to make a great breakthrough in the field of Beidou navigation and positioning in China.
【學(xué)位授予單位】：桂林電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN965.5

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本文編號：2258620