【摘要】：自1964年子午儀系統(tǒng)正式建立以來,衛(wèi)星導航系統(tǒng)經(jīng)歷了五十年的飛速發(fā)展. GPS系統(tǒng)于20世紀80年代末進入中國，在交通運輸，大地測量，軍事定位等領(lǐng)域得到了廣泛應(yīng)用。經(jīng)過多年的發(fā)展，我國的導航事業(yè)已經(jīng)進入高速發(fā)展的時期。當前，導航系統(tǒng)接收機有多種類型，如定位型、測地型、集成型等等。衛(wèi)星導航系統(tǒng)已經(jīng)成為一個高精度、實時和全球性的無線電導航授時多功能系統(tǒng)。 北斗全稱為北斗衛(wèi)星導航系統(tǒng),它是繼美國全球定位系統(tǒng)GPS、俄羅斯的GLONASS、歐洲的伽利略Galileo之后,我國自主設(shè)計開發(fā)的主動式衛(wèi)星導航系統(tǒng)（BeiDou Navigation Satellite System）。北斗二代衛(wèi)星定位系統(tǒng)是一個雙頻段軍民兩用的測距系統(tǒng)，與GPS系統(tǒng)相比，具有更多的衛(wèi)星數(shù)量和雙向簡報文通信功能。近年來，隨著北斗衛(wèi)星數(shù)的逐漸增多，北斗二代接收機逐漸成為研制的熱點。本文針對北斗衛(wèi)星導航系統(tǒng)的前端電路提出了一套設(shè)計方案，最終產(chǎn)生出符合標準的待解碼信號。 本文首先介紹了北斗衛(wèi)星導航系統(tǒng)研制和發(fā)展的意義以及相關(guān)知識，并介紹了射頻技術(shù)在衛(wèi)星通信領(lǐng)域中的應(yīng)用與發(fā)展。并對本文中射頻接收機原理進行了闡述。接著，詳細分析和比較了四種射頻接收機結(jié)構(gòu)和各種射頻技術(shù)指標，在此基礎(chǔ)之上，確定了本文選用超外差式系統(tǒng)結(jié)構(gòu)，并將查閱到的射頻指標分配到各模塊。第四章創(chuàng)新性的引入了體聲波濾波器對帶外噪聲進行抑制，可以有效提升系統(tǒng)的信噪比。第五章、第六章對射頻模塊進行設(shè)計，并利用Altium Designer09軟件進行原理圖和PCB繪制。最后給出了本文射頻接收機系統(tǒng)實物圖，，對整機進行測試調(diào)試，給出測試結(jié)果與分析。并做出總結(jié)和展望。
[Abstract]:Since the establishment of meridian system in 1964, satellite navigation system has experienced rapid development for 50 years. GPS system entered China in the late 1980s and has been widely used in transportation, geodesy, military positioning and other fields. After years of development, China's navigation industry has entered a period of rapid development. At present, there are many types of navigation system receivers, such as positioning type, geodesic type, integrated type and so on. Satellite navigation system has become a high-precision, real-time and global radio navigation time-serving multifunctional system. Beidou is known as Beidou satellite navigation system. It is an active satellite navigation system (BeiDou Navigation Satellite System).) designed and developed by our country after GPS, GLONASS of Russia and Galileo Galileo of Europe. Beidou second generation satellite positioning system is a dual-band ranging system with dual-band military and civilian. Compared with GPS system, it has more satellite number and bi-directional briefing communication function. In recent years, with the increasing number of Beidou satellites, the Beidou second generation receiver has gradually become a hot spot. In this paper, a design scheme for the front-end circuit of Beidou Satellite Navigation system is proposed, which can produce the standard signal to be decoded. This paper first introduces the significance and knowledge of the research and development of Beidou satellite navigation system, and introduces the application and development of radio frequency technology in the field of satellite communication. The principle of RF receiver in this paper is described. Then, four kinds of radio frequency receiver structures and various radio frequency technical indexes are analyzed and compared in detail. On the basis of this, the superheterodyne system structure is selected, and the radio frequency indexes are allocated to each module. In chapter 4, the volume acoustic filter is introduced to suppress the out-of-band noise, which can effectively improve the signal-to-noise ratio (SNR) of the system. In chapter 5, chapter 6, RF module is designed, and schematic diagram and PCB are drawn by Altium Designer09 software. Finally, the physical diagram of the RF receiver system is given, and the test results and analysis are given. And make a summary and prospect.
【學位授予單位】：中國海洋大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN965.5

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