GPS芯片开发及授时性能分析

GPS Chip Development and Timing Performance Analysis

GPS接收机的核心器件即为GPS OEM板(即GPS芯片),对其直接进行开发,在使用上具有灵活方便、经济实用、便于融合等优点。本文以Motorola M12MT+TIMING ONCORE型GPS OEM板为例,论述了GPS OEM板的具体开发使用过程和相关注意事项,并对其授时性能、1pps(秒脉冲)输出的特点等进行了研究,提供了用其实现精确授时的方法,并对授时精度进行了分析,对于测量中精确数字授时的实现具有一定的实际意义。

As the kernel component of GPS receiver, the direct development of the GPS OEM board has some advantages in application, such as feasibility, convenience, economy and modulization, etc. In the paper, the detailed development as well as some related items of the GPS OEM board are discussed, and the timing performance and the lpps output are also researched with the Motorola M12MT＋ TIMING ONCORE as an example. As a result, the method of accurate timing using GPS OEM board is presented, and an accuracy analysis is provided, which is helpful for the accurate timing in surveying.