研究生: |
劉坤賦 Kun-fu Liu |
---|---|
論文名稱: |
GPS信號品質量測與分析 Measurement and Analysis of GPS Signal Quality |
指導教授: |
高維文
Wei-Wen Kao 陳漢宗 Hann-Tzong Chern |
口試委員: |
卓大靖
Dah-jing Jwo |
學位類別: |
碩士 Master |
系所名稱: |
電資學院 - 電子工程系 Department of Electronic and Computer Engineering |
論文出版年: | 2007 |
畢業學年度: | 95 |
語文別: | 中文 |
論文頁數: | 77 |
中文關鍵詞: | 位置精度 、全球定位系統 、遮蔽效應 、多路徑效應 、信號可信度 |
外文關鍵詞: | GPS, positioning accuracy, shadowing, multipath, reliability and quality of the GPS fixes |
相關次數: | 點閱:317 下載:2 |
分享至: |
查詢本校圖書館目錄 查詢臺灣博碩士論文知識加值系統 勘誤回報 |
近年來由於全球定位系統(GPS)快速的發展與技術的成熟,已廣泛地應用在導航定位系統上。一般大眾在使用定位系統裝置時,從螢幕地圖中可知道身在何處,但卻往往不清楚定位的精度為何。在本論文研究中,利用一般GPS接收器的標準輸出格式-NMEA資料來達成位置精度的判斷,以提供信號品質的資訊給使用者及其它接收端。我們使用加速儀與電子羅盤來分別對GPS計算的載具速度(SOG)、角度(COG)進行比對,並根據環境產生的遮蔽效應與多路徑效應,找出GPS信號的特性。其中較顯著的四項因子:仰角40度以上衛星的C/No平均值、SOG穩定度、COG解出之向心加速度以及PDOP值。最後我們提出利用模糊邏輯法的演算法完成GPS信號可信度的判斷。
With the rapid development and maturity in technology, Global Positioning System (GPS) has been widely used in navigation and positioning systems. One issue in GPS positioning is the lack of positioning accuracy information and people may use the GPS fix without any idea of its quality. In this thesis, the standard GPS NMEA output format is being used to determine the accuracy of the positioning and the information can then be provided to other applications or users. The Speed over Ground (SOG) and Course over Ground (COG) measured by the GPS are compared with the outputs from an accelerometer and a compass respectively. Based on the compared results, the characteristics of the GPS under the influence of the shadowing and multi-path effects of the environment are investigated. Four most important factors, including the average C/No values of the satellites with an elevation angle which is more than 40 degrees, the stability of SOG, the centripetal acceleration derived from COG and Position Dilution of Precision (PDOP) can be used to describe the GPS characteristics in these environments. Finally, a Fuzzy Logic based algorithm is proposed to determine the reliability and quality of the GPS fixes.
【1】SiRF NMEA Reference Manual ,2005
【2】SAMSUNG,“S3C2412 Data Sheet”,2006.
【3】KIONIX,“KXP74-1050 Data Sheet”,2006.
【4】AKM,“AKM-8970N Data Sheet”,2006.
【5】Garin, L. and Rousseau, J.M., “Enhanced Strobe Correlator Mulitipath Rejection for Code & Carrier”,ION GPS’97, Kansas City,1997
【6】L.Weil, “GPS Multipath Mitigation by Means of Correlator Reference Waveform Design”, Proceedings of the Insitute of Navigation National Technical Meeting,UNITED STATES 1997.
【7】M.S.Braasch,A.J.Van Dierendonck, “GPS Receiver Architectures and Measurements”, Proceedings of the IEEE, Vol.87, No.1, January 1999
【8】Robers, G. W., Meng, X.,Dodson,A. H. and Cosser, E., “Multipath Mitigation for Bridge Deformation Monitoring”, Journal of Global Positioning System, Vol.1, No.1,2002
【9】Xin Ma, Salah Sukkarieh, Jong-Hyuk Kim, “Vehicle Model Aided Inertial navigation”, Proceedings of the IEEE, Vol.2, pp 1004-1009, October 2003.
【10】G.Dissanayake, S.Sukkarieh, E.Nebot, H.Durrant-Whytr,“The Aiding of a Low-Cost Strapdown Inertial Measurement Unit Using Vehicle Model Constraints for Land Vehicle Applications”, IEEE Transactions on Robotics and Automotor, Vol.17, No.5, October 2001.
【11】W.W. Kao, C.L. Tsai,“Adaptive and Learning Calibration of Magnetic Compass”,Journal of Measurement Science and Mathematics and Computation.,Vol.17, No11, pp. 3073-3082, November 2006
【12】高維文(1995),地面車輛定位及導航系統,行政院國科會專題研究計劃,台灣工業技術學院機械系,台北。
【13】姜嘉瑞(1997),GPS與INS整合之三為定位系統研究,碩士論文,台灣工業技術學院機械工程技術研究所,台北。
【14】曾清涼、儲慶美(1999),GPS衛星測量原理與應用,國立成功大學衛星資訊研究中心。
【15】朱明亮(2000),應用GPS觀測雜訊比指標作基線向量品質管制,碩士論文,國防大學中正理工學院軍事工程研究所,桃園。
【16】黃俊凱(2005),微機電感測器於地面車輛定位系統之應用,碩士論文,台灣科技大學機械工程研究所,台北。
【17】黃良吉(2006),GPS與感測器整合於三維地面車輛定位之應用,碩士論文,台灣科技大學機械工程研究所,台北。
【18】安守中,GPS全球衛星定位系統入門,全華科技圖書,ISBN 957-21-3701-8,台北,2003。
【19】莊智清、黃國興,e-navigation電子導航,全華科技圖書,ISBN 957-21-3154-0,台北,2003。
【20】研勤科技股份有限公司,“PaPaGo電子地圖”,2006