Fast Capture Analysis of Beidou C_(B2I) Code Based on Segment Folding Algorithm

Satellite navigation technology is widely used in transportation, logistics, agriculture, aerospace, land security, land planning, basic surveying and mapping, geological and earthquake disaster monitoring, etc. Because of its special technical significance, China must vigorously develop Beidou satellite navigation technology in order to avoid being controlled by others and ensure national security. Because the search and acquisition time of satellite signal (SS) determines the performance of GPS / BeiDou receiver, it has always been the primary topic of satellite navigation technology research to acquire SSs quickly and accurately. This paper presents a segmented folding algorithm (SFA) based on Beidou C_ (b2i) code as the research object, the Beidou C_ (b2i) code fast acquisition (FA) analysis. The principle of acquisition system and Beidou C are discussed_ (b2i) code SS acquisition method; The frame flow chart and algorithm formula of the SFA are listed. Finally, the effectiveness of the segmented folding acquisition algorithm proposed in this paper is verified by simulation experiments and performance analysis, which is very helpful to improve the acquisition rate.