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???org.dspace.app.webui.jsptag.ItemTag.dcfield??? | Value | Language |
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dc.contributor.advisor | 張帆人(Fan-Ren Chang) | |
dc.contributor.author | Chao-Te Lee | en |
dc.contributor.author | 李昭德 | zh_TW |
dc.date.accessioned | 2021-06-13T07:10:00Z | - |
dc.date.available | 2010-07-30 | |
dc.date.copyright | 2005-07-30 | |
dc.date.issued | 2005 | |
dc.date.submitted | 2005-07-26 | |
dc.identifier.citation | 參考文獻
[1] E. D. Kaplan, “Understanding GPS: Principles and Application”, Artech House, London, 1996. [2] J. B. Y. Tsui, “Fundamentals of global positioning system receivers, a software approach” , John Wiley & Sons, Canada, 2000. [3] G. Dimos, T. Upadhyay and T. Jenkins, “Low-cost solution to narrowband GPS interference problem”, Aerospace and Electronics Conference, 1995. NAECON 1995, Proceedings of the IEEE, Vol. 1, pp. 145-153, May 1995. [4] “GP2015 Datasheets: GPS Receiver RF Frond End”, Zarlink [5] “GP2021 Datasheets: GPS 12-Channel Correlator”, Zarlink [6] B. W. Parkinson and J. J. Spilker, “Global positioning system: theory and applications” , AAAI, USA, 1996. [7] 張仲良, “GPS頻段內干擾抑制訊號處理研究”, 國立成功大學電機工程學 系碩士論文, 2004. [8] 莊智清, 黃國興, “電子導航”, 全華科技圖書股份有限公司, 2001. [9] M. Ibankahla, “Application of Neural Networks to digital communications-survey”, National Polytechnic Institude of Toulouse, EMSEEIHT, 2 Rue Camichel, 31071 Toulouse Cedex, France. [10] P. T. Capozza, B. J. Holland, T. M. Hopkinson, and R. L. Landrau, “A single-chip narrow-band frequency-domain excisor for a Global Positioning System (GPS) receiver”, IEEE J. Solid-State circuits, vol.35, pp. 401-411, Mar. 2000. [11] R. Rifkin and J. J. Vaccaro, ”Comparison of narrowband adaptive filter technologies for GPS”, IEEE conference, pp.125-131. 2000. [12] F. J. Harris, “On the use of windows for harmonic analysis with the discrete Fourier transform”, Proc. IEEE, vol. 66, pp. 51–83, Jan. 1978. [13] A. V. Oppenheim and R. W. Schafer, “Discrete-time Signal Processing”, Prentice Hall, 1989. [14] R. E. Ziemer and W. H. Tranter, “Principle of communication: Systems, Modulation, and Noise”, John Wiley & Sons, Inc, 2002. [15] W. L. Mao, “Design of Smart GPS Receivers in Narrowband Interference and Kinematic environments”, NTU, E.E., P.H.D dissertation, 2004 [16] 繆紹剛、黃嘉淵編著, “通訊系統模擬 System View By ELANIX使用入門”, 全華科技圖書股份有限公司, 1999. [17] U. Meyer-Baese: “Digital Signal Processing with Field Programmable Gate Arrays ”, Springer, 2001. [18] L. Wanhammar, “DSP Integrated Circui ”, Academic Press, 1999. [19] 蘇倉弘, “GPS接收機抗窄頻干擾之頻域設計”, 國立台灣大學電機工程研究所碩士論文, 2004. [20] 張書銘, “多模態數位中頻降頻器中數值控制震盪器與FIR濾波器之設計與實現”, 國立東華大學電機工程研究所碩士論文, 2003. [21] 涂世雄, “CSD的共同消去法之實現與應用”, 中原大學電機工程研究所碩士論文, 2003. [22] Taylor and J. Fred, “Digital Filter Design Handbook”, New York, Marcel Dekker, 1983. [23] 李冠儀, “GPS接收機之自動增益控制電路設計”, 國立台灣大學電機工程研究所碩士論文, 2005. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/35785 | - |
dc.description.abstract | 摘 要
全球定位系統(GPS)可在各種導航、時頻同步等工程應用領域提供精確的位置與時間資訊。但在某些場合,GPS接收機受到外界射頻訊號(RF)的干擾,發生GPS定位精確度降低的現象,更甚者使接收機同步功能失鎖而無法接收衛星訊號。有鑑於此,GPS接收機的干擾抑制研究,已成為一重要且實際的課題。 在本論文中,運用重疊快速傅立葉轉換(OFFT)來呈現對GPS窄頻干擾的抑制效果,首先利用快速傅立葉轉換(FFT)將訊號轉換至頻域,找出頻譜上之干擾成分並予以抑制或去除,再將去除干擾後之頻譜施以快速反傅立葉轉換(IFFT)而得時間訊號。除了干擾抑制處理外,為了使信號規格與GP2015和GP2021晶片匹配,加入頻率轉移將訊號中心頻率1.16MHz轉換至1.405MHz,此設計採用移相形成法,以完成單邊帶調變技術。 最後,將本設計應用在Altera Stratix EP1S25F780C模擬板上,並利用Altera QuartusⅡ發展軟體作電路的合成、電路配置與繞線以及時序模擬,並透過Matlab軟體來驗證窄頻干擾抑制與頻率轉移電路之可行性。經過模擬及驗證後可知,窄頻干擾抑制電路針對單頻及多頻干擾有較佳的抑制效果,但所需的硬體成本較高,且運算時間較長。 | zh_TW |
dc.description.abstract | Abstract
GPS is an accurate navigating system and generally used in civilian or military applications. But GPS receiver performance is usually degraded by intentional or unintentional RF interference. The interference may cause the navigation error and even saturate the receiver. In this thesis, we use overlapped fast Fourier transform (OFFT) to simulate the performance of narrowband interference suppression. First, fast Fourier transform (FFT) can translate time sequence after analog to digital converter (ADC) to frequency domain. Then excision processing suppresses interference power in the spectrum. Inverse fast Fourier transform (IFFT) reconstruct the time sequence after interference excision. Besides interference suppression processing, in order to match specifications of the GP2015 and GP2021 chips, we design the frequency translation to transfer the central frequency of the GPS signal from 1.16MHz to 1.405MHz. The utilization of the phase-shifted method completes single sideband modulation. Finally, according to the fixed-point simulation, we choose Altera Stratix EP1S25F780C5 chip to design the hardware circuits. Altera Quartus Ⅱ software is utilized for logic synthesis, circuit place and route and timing simulation. The Matlab software is used to verify the design of the narrowband suppression circuit and the frequency translation circuit. The simulation and the verification can show that overlapped fast Fourier transform is a powerful approach to suppress the single tone and multi-tone narrowband interference. But it costs much latency and needs much hardware cost. | en |
dc.description.provenance | Made available in DSpace on 2021-06-13T07:10:00Z (GMT). No. of bitstreams: 1 ntu-94-R92921003-1.pdf: 1381874 bytes, checksum: c4b22b0d682efe1b2177e929787a60fc (MD5) Previous issue date: 2005 | en |
dc.description.tableofcontents | 目錄
頁次 中文要…………………………………………………………………i 英文摘要………………………………………………………………ii 目錄……………………………………………………………………iii 圖目錄…………………………………………………………………vi 表目錄……………………………………………………………………x 第一章 緒論..............................................................................................1 1.1 研究動機………………………………………………………………..1 1.2 研究方向………………………………………………………………..2 1.2.1 GPS干擾抑制技術………………………………………………2 1.2.2系統架構…………………………………………………………..4 1.3 論文組織………………………………………………………………..6 第二章 全球定位系統接收機...............………………………………...7 2.1 GPS訊號特性...............………………………………………………7 2.2 GPS電碼特性........................................................................................8 2.3 GPS接收機系統架構............................................................................10 第三章 窄頻干擾抑制與頻率轉移…………………………………....13 3.1 前置相關訊號處理…………………………………………………..13 3.1.1 時域處理………………………………………………..13 3.1.2 頻域處理………………………………………………..14 3.2 重疊快速傅立葉轉換………………………………………………..16 3.2.1 窗型化與重疊結構……………………………………………16 3.2.2 快速傅立葉轉換………………………………………………21 3.2.3 干擾抑制處理法則……………………………………………23 3.2.4 快速反傅立葉轉換……………………………………………28 3.3 頻率轉移…………………………………………………………......29 3.3.1 頻率鑑別法……………………………………………………30 3.3.2 移相形成法……………………………………………………32 第四章 軟體模擬………………………………………………………37 4.1 模擬環境之設定……………………………………………………..37 4.2 模擬結果……………………………………………………………..42 4.2.1 單頻干擾之測試………………………………………………43 4.2.2 多頻干擾之測試………………………………………………44 4.2.3 掃頻干擾之測試………………………………………………45 第五章 硬體設計與驗證………………………………………………47 5.1 窄頻干擾抑制電路……………………………………………………47 5.1.1 窗型化電路………………………………………………………48 5.1.2 FFT電路………………………………………………………48 5.1.3 干擾抑制電路……………………………………………………54 5.1.4 IFFT電路……………………………………………………..55 5.1.5 硬體驗證結果……………………………………………………59 5.2 頻率轉移電路…………………………………………………………65 5.2.1 數值控制振盪器…………………………………………………65 5.2.2 希伯特濾波器……………………………………………………69 5.2.3 硬體驗證結果……………………………………………………76 第六章 結論與未來展望………………………………………………81 6.1 結論………………………………………………………………………81 6.2 未來展望…………………………………………………………………83 參考文獻………………………………………………………………85 | |
dc.language.iso | zh-TW | |
dc.title | GPS接收機窄頻干擾抑制與頻率轉移之設計 | zh_TW |
dc.title | Design of Narrowband Suppression and Frequency Translation in GPS Receivers | en |
dc.type | Thesis | |
dc.date.schoolyear | 93-2 | |
dc.description.degree | 碩士 | |
dc.contributor.coadvisor | 曹恆偉(Hen-Wai Tsao) | |
dc.contributor.oralexamcommittee | 王立昇,萬自建,毛偉龍 | |
dc.subject.keyword | 全球定位系統,窄頻干擾抑制, | zh_TW |
dc.subject.keyword | GPS,Narrowband Suppression, | en |
dc.relation.page | 86 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2005-07-27 | |
dc.contributor.author-college | 電機資訊學院 | zh_TW |
dc.contributor.author-dept | 電機工程學研究所 | zh_TW |
Appears in Collections: | 電機工程學系 |
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ntu-94-1.pdf Restricted Access | 1.35 MB | Adobe PDF |
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