北斗二代軟件接收機(jī)關(guān)鍵技術(shù)研究
[Abstract]:Beidou Satellite Navigation system, abbreviated as BDSs, is short for Beidou system. Beidou system is a global positioning communication system developed by our country. This system not only provides accurate and reliable positioning, navigation and time service for all kinds of users, but also has the function of short message communication. Beidou second generation software receiver has the advantage that the hardware receiver can not compare, can give full play to the flexibility of the software, and has laid the foundation for promoting the research of Beidou navigation algorithm and speeding up the development of Beidou system. In this paper, the key technology of the software receiver of Beidou second generation B1-frequency signal is studied. The main contents include the acquisition and tracking of satellite signal and the subsequent decoding processing. In the part of acquisition and tracking, several acquisition algorithms are compared and analyzed, and the method of code phase parallel acquisition and fine capture is used to realize the acquisition of Beidou actual signal, and then the principle of signal tracking is introduced. The setting of signal tracking parameters is explored and the most appropriate parameters are selected to track the actual Beidou signal. In the decoding part, NH code demodulation and BCH check are carried out, and two different checking methods are proposed. On the basis of ensuring the correctness of the navigation message, the contents of sub-frames are extracted, the ephemeris parameters are solved, and the location results are obtained. By comparing the location results with the actual position, the error is within the allowable range, and the feasibility of the algorithm is verified.
【學(xué)位授予單位】:西安電子科技大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:TN965.5
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