【摘要】：全球衛(wèi)星導航系統(tǒng)(GNSS)不僅是關系國家國防安全的技術支撐系統(tǒng),同時也是服務于民生的重要工具。我國自行研制的“北斗”導航定位系統(tǒng)也在逐步發(fā)展中。建設具有全球導航定位能力的北斗衛(wèi)星導航系統(tǒng)對我國經濟建設和國防建設產生著深遠的影響。北斗二代衛(wèi)星系統(tǒng)是我國獨立自主研發(fā)的新一代衛(wèi)星導航系統(tǒng)�；鶐盘柼幚硎菍Ш绞諜C的核心部分之一。本論文首先分析了各國全球衛(wèi)星導航系統(tǒng)的發(fā)展情況,并詳細介紹了北斗二代導航系統(tǒng)的結構、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,對原有接收機捕獲算法進行改進。導航接收機的跟蹤環(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技術的研究。根據研究所得出的關鍵參數對本課題的跟蹤環(huán)路進行設計與改進。接著本文詳細介紹了基于FPGA+DSP架構的“北斗二代”(B1頻點)接收機的實現(xiàn)方法。設計與實現(xiàn)了北斗接收機基帶信號處理的軟件算法,分別對FPGA中的模塊設計和DSP中的軟件控制算法流程進行了詳細的介紹,完成了整個系統(tǒng)的軟件設計。與射頻前端設備及外部天線相連,組成了完整的北斗導航接收機。在靜態(tài)環(huán)境下對接收機定位性能進行測試。定位結果表明,靜態(tài)環(huán)境下本課題所研制的北斗接收機單點定位誤差在10米之內,基本滿足了北斗開放服務(Open Service)的定位精度指標。在該章結尾對產生定位誤差的原因進行了分析。最后在總結與展望中回顧整個論文的研究與實現(xiàn)過程。并對下一步實現(xiàn)高精度的多頻多模式的軟件導航接收機進行展望,期盼我國北斗導航定位領域取得更大的突破。
[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.
【學位授予單位】：桂林電子科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN965.5

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本文編號：2258619