B2a signal acquisition method and device

The invention belongs to the technical field of satellite navigation, and discloses a B2a signal acquisition method and device. The B2a signal acquisition method comprises the steps: the Doppler frequency and code phase of a B1C signal sent by a current satellite are acquired, the code phase search...

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Bibliographische Detailangaben
Hauptverfasser: ZHANG BAIHUA, DONG TINGTING, ZHU YINGNA
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The invention belongs to the technical field of satellite navigation, and discloses a B2a signal acquisition method and device. The B2a signal acquisition method comprises the steps: the Doppler frequency and code phase of a B1C signal sent by a current satellite are acquired, the code phase search range of a B2a signal is determined according to the Doppler frequency and code phase which correspond to the B1C signal, and then the B2a code phase can be acquired and searched within the small code phase search range. The problem that the acquisition sensitivity of an existing acquisition methodis insufficient due to the short B2a signal code period and the not enough integral duration can be solved, the B2a signal can be quickly acquired, the simple and practicable effects are achieved, andthe sensitivity is high. 本发明属于卫星导航技术领域领域,公开了种B2a信号捕获方法及装置。该方法包括:捕获当前卫星发送的B1C信号的多普勒频率和码相位,根据B1C信号对应的多普勒频率和码相位确定B2a信号的码相位搜索范围,进而可以在较小的码相位搜索范围内对B2a码相位进行捕获搜索。本发明能够解决由于B2a信号码周期短、积分时长不够所导致的现有捕获方法捕获灵敏度不足的问题,能够快速捕获B2a信号,且简单易行,灵敏度较高。