Research And Realization Of Beidou Common-view Time Service Method

The Beidou navigation positioning system is a regional satellite navigational system, This article on the basis of the Beidou time service system, proposed the Beidou common-view time service theory, we has done the thorough research of Beidou common-view time service principle and the method, and carried on Beidou Common-view time service machine to be software and hardware design.Because the Beidou common-view time service technology is for realize the high accuracy time synchronization, the key of achieved this goal is needs to eliminate the atmosphere lagging error, therefore in this article, the spatial electromagnetic wave dissemination atmospheric detention theory has conducted the research to the Earth nearby in the first, and has produced the general expression and several kind of classical detentions models which the ionized layer and the troposphere atmosphere retards, finishes the preparation for the following chapter.Next, this article introduced the Beidou time service system working process and the time service pattern, and in this foundation we proposed the Beidou common-view time service theory, produced Beidou common-view time service principle,the mathematical formula of difference with two atomic clock , the computation process and the error analysis, the system simulation and the applied plan of Beidou Common-view time service technology .In order to apply the Beidou common-view time service technology in the practise,we design the Beidou common-view time service machine in the last, It has used the DSP+FPGA signal processing hardware platform, involved on basie of FPGA the capture track design and on basie of DSP time service software design, and has produced the whole circuit diagram and on basie of VC++ the common-view time service data processing software .