Rapid frame synchronization method for GPS navigation message

The invention discloses a rapid frame synchronization method for a GPS navigation message, and belongs to the technical field of satellite navigation. The method comprises the steps of receiving and collecting the GPS navigation message, calculating the intra-week seconds and subframe numbers of the navigation message which should be received currently, reconstructing the conversion words in eachsubframe, calculating a currently predicted page number by using a local clock, reproducing the navigation message locally, searching in a neighborhood range of the local clock counting when a navigation signal is unlocked, and the like. According to the method, the frame synchronization processing of the navigation signals can be quickly realized by using the local time count and the previously received navigation message, and the positioning speed of the navigation receiver is accelerated. 本发明公开了一种GPS导航电文的快速帧同步方法，属于卫星导航技术领域。其包括接收并收集GPS导航电文，计算当前应接收导航电文的周内秒和子帧号，对各子帧中的转换字进行重构，利用本地时钟计算当前预测的页号，在本地复现导航电文，当导航信号失锁时在本地时钟计数的邻