The older phone triangulates a user's position via cell-phone towers. The new one has a GPS receiver that can track a user in real time.
以前的手机通过手机信号发射塔确定用户的位置，新款手机有一个GPS接收器能够随时追踪使用者。
Rapidly dynamic GPS receiver needs a high-performance microprocessor because of continues tracks of several channels and then great real-time operation.
在高动态gps接收机中，由于要对多通道连续跟踪，实时数据运算处理量大，因此对微处理器的性能要求较高。
GPS signal acquisition time is a key factor in GPS receiver performance, especially in the high dynamic, real-time applications or in capturing weak GPS signal areas.
GPS信号捕获时间是影响GPS接收机性能的一个关键因素，尤其是在高动态和实时性要求高的应用中或者对弱gps信号的捕获方面。
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