【摘要】：高精度的時差頻差定位方法是衛(wèi)星定位研究領域的關鍵技術,隨著國內衛(wèi)星導航與定位應用技術的迅速發(fā)展,它在民用和軍事領域中受到了越來越廣泛的應用。因此,對高精度的時差頻差定位方法的研究具有重要的理論意義和應用價值。本文在雙星定位的研究背景下,深入研究了基于雙通道的頻差測量方法和基于頻差時差的聯(lián)合定位的技術。論文主要內容如下： 1在單通道多普勒測頻的基礎上研究了一種新的高精度多普勒頻差測量方法。該方法通過兩通道數據相關和接收信號的包絡斜率測量分別獲得了多普勒頻率的基帶頻差和模糊數差。并根據基頻差和模糊數差獲得基于雙通道的高精度多普勒頻差測量結果。 2利用基于雙通道的高精度多普勒頻差測量方法對常見的單頻信號、線性調頻信號、二相編碼信號、四相編碼信號進行仿真測試和分析,驗證了該方法的有效性。并針對信號抖動、不同信噪比和所需脈沖數等條件進行了算法適用性仿真。 3分別介紹了時差定位原理、頻差定位原理和空間坐標系轉換公式,為時差頻差聯(lián)合定位方法的研究提供理論基礎。 4詳細介紹了時差頻差定位原理,并在獲得精確的頻差和時差參數的基礎上研究了雙星時差頻差聯(lián)合定位方法。該方法是用頻差定位來彌補時差定位的缺陷,從而有效地提高了時差定位的定位精度。
[Abstract]:With the rapid development of the domestic satellite navigation and positioning technology, the high-precision time-difference frequency difference positioning method is the key technology in the field of satellite positioning. With the rapid development of the domestic satellite navigation and positioning technology, it has been more and more widely used in civil and military fields. Therefore, the research of high precision time difference frequency difference location method has important theoretical significance and application value. In this paper, under the background of dual satellite positioning, the frequency difference measurement method based on two channels and the joint location technology based on frequency difference time difference are deeply studied. The main contents of this paper are as follows: 1 based on the single channel Doppler frequency measurement, a new high precision Doppler frequency difference measurement method is studied. The base-band frequency difference and the ambiguity number difference of the Doppler frequency are obtained by measuring the envelope slope of the two-channel data correlation and the received signal, respectively. According to the fundamental frequency difference and the ambiguity number difference, the high precision Doppler frequency difference measurement results based on two channels are obtained. 2 the high precision Doppler frequency difference measurement method based on two channels is used to simulate and analyze the common single frequency signal, linear frequency modulation signal, two phase coded signal and four phase coded signal, and the validity of the method is verified. The applicability of the algorithm is simulated for signal jitter, different signal-to-noise ratio (SNR) and pulse number. (3) the principle of time-difference location, the principle of frequency-difference positioning and the transformation formula of spatial coordinate system are introduced respectively, and the theoretical basis is provided for the study of the joint location method of time-difference frequency difference. 4. The principle of TDOA location is introduced in detail, and on the basis of obtaining accurate frequency difference and time difference parameters, the combined TDOA positioning method is studied. In this method, frequency difference positioning is used to make up for the defect of time difference location, and the precision of time difference location is improved effectively.
【學位授予單位】：西安電子科技大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：P228.4

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