1results about How to "Reduce time to first fix" patented technology

A method and apparatus for acquisition preprocessing includes: estimating and determining the visible satellites of the navigation receiver within a preset time period based on satellite visibility association information of the navigation receiver; and performing acquisition processing based on the estimated visible satellites of the navigation receiver within the preset time period. Embodiments of the present invention reduce the number of satellites searched during cold start, shorten the initial positioning time during cold start, and improve the acquisition efficiency of the navigation receiver.