基于人工神經(jīng)網(wǎng)絡(luò)的GPS衛(wèi)星信號模擬器信號估計方法
GPS satellite simulatior signal estimation based on ANN
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摘要: 多通道全球定位系統(tǒng)(GPS)衛(wèi)星信號模擬器用來為GPS接收機和導航系統(tǒng)提供逼真的測試信號。該文從模擬器設(shè)計的角度對到達GPS接收機天線的衛(wèi)星信號進行了分析，著重討論了因眾多誤差因素影響而不易直接利用經(jīng)驗?zāi)Ｐ痛_定的幾個波形參量的估計問題?；谌斯ど窠?jīng)網(wǎng)絡(luò)(ANN)理論，提出一種利用ANN來模擬信號傳播延遲、載波相位、信號功率等參量的方法。給出了基于ANN的模擬器閉環(huán)測試系統(tǒng)的結(jié)構(gòu)。并對所設(shè)計的ANN進行了訓練和驗證，仿真實驗結(jié)果表明，所設(shè)計的ANN能夠在統(tǒng)計意義上逼真地模擬樣本數(shù)據(jù)，從而使基于ANN的模擬器信號狀態(tài)參量計算能夠滿足設(shè)計要求，可以直接應(yīng)用于多通道GPS信號模擬器的研制。Abstract: Multi-channel GPS satellite signal simulator provides realistic test signals for GPS receivers and navigation systems. In this paper, signals arriving the antenna of GPS receiver are analyzed from the point of view of simulator design. Focus is put on the estimation meth-ods of several signal parameters that are difficult to determine- directly according to existing experiential models due to various error factors. Based on the theory of Artificial Neural Net-work (ANN), an approach to simulate signal propagation delay, carrier phase, power, and other parameters using ANN is proposed. The architecture of the hardware-in-the-loop test system is given. The ANN training and validation process is described. Experimental results demon-strate that the ANN designed can simulate sample data statistically in high fidelity. Therefore the computation of signal state based on this ANN can meet the design requirement, and can be directly applied to the development of multi-channel GPS satellite signal simulator.
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M. Baker, B. Dingman, W. Gregg, High fidelity GPS satellite simulation, Washington, AIAA Modeling and Simulation Technologies Conference, New Orleans, USA, AIAA, 1997, 213-223.[2]M.C. Moreau, M. Wennersten, et al., Test results of the PiVoT receiver in high Earth orbits using a GSS GPS simulator, ION GPS 2001, Salt Lake City, ION, 2001, 2316-2326.[3]I.C. Billing, STR4760 Multi-channel GPS/SBAS simulator product specification, England,Sprirent Communications, Inc., 2000, 1-28.[4]B.W. Parkinson, J. J. Spilker Jr., Global Positioning System: Theory and Applications (Volume I), Washington, AIAA, 1996, 82-93,485-516.[5]E.D. Kaplan, Understanding GPS: Principles and Applications, Boston, Artech House, 1996,chapter 7.[6]S.K. Gupta, M. K. Low, C. W. Tan, A new approach to simulate GPS measurement, IEEE Conference on Position, Location and Navigation, CA, U.S.A., 1998, 236-242.叢爽, 面向 MATLAB 工具箱的神經(jīng)網(wǎng)絡(luò)理論與應(yīng)用, 合肥, 中國科學技術(shù)大學出版社, 1998, 1-15.[7]Lupash Consulting.[J].Matlab GPS Software Toolbox Users Guide And Reference Manual (Version 3.01), Fullerton, USA, Lupash Consulting.2001,:-[8]A. Leick, GPS Satellite Surveying (2nd ed.), New York, Wiley-Interscience, John Wiley Sons,1995, 286-316. -
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