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发明授权
CN101453783B CDMA手机GPS时间校准系统及方法 失效 - 权利终止

CDMA手机GPS时间校准系统及方法
摘要：
本发明提供一种CDMA手机GPS时间校准方法，该方法包括如下步骤：产生周期波，并输出给GPS模拟器；产生CDMA射频信号，并输出给整合器；记录输出周期波与输出CDMA射频信号之间的时间差值；接收周期波；产生GPS射频信号，并输出给整合器；记录接收周期波与输出GPS射频信号之间的时间差值；整合CDMA射频信号及GPS射频信号，并将整合后的射频信号输出给CDMA手机；解调整合后的射频信号，获取CDMA射频信号与GPS射频信号之间的时间差值，并传送给计算机；及根据上述各时间差值计算CDMA手机内CDMA讯号与GPS讯号之间的时延，依此来校准CDMA手机内的CDMA讯号与GPS讯号以使其同步。本发明还提供一个CDMA手机GPS时间校准系统。利用本发明可提高CDMA手机内GPS定位的精确度。
摘要（英）：

The invention provides a GPS time calibration method for CDMA mobile phones. The method comprises the steps of generating and outputting periodic waves to a GPS simulator, generating and outputting a CDMA radio-frequency signal to an integrator, recording the time difference value between the output periodic waves and the output CDMA radio-frequency signal, receiving the periodic waves, generating and outputting a GPS radio-frequency signal to the integrator, recording the time difference value between the received periodic waves and the output GPS radio-frequency signal, integrating the CDMAradio-frequency signal and the GPS radio-frequency signal, outputting the integrated radio-frequency signal to a CDMA mobile phone, demodulating the integrated radio-frequency signal, acquiring and transmitting the time difference value between the CDMA radio-frequency signal and the GPS radio-frequency signal to a computer, calculating the time delay between a CDMA signal and a GPS signal in theCDMA mobile phone according to the time difference values, and calibrating the CDMA signal and the GPS signal in the CDMA mobile phone to be synchronous according to the time delay. The invention also provides a GPS time calibration system for CDMA mobile phones. The GPS positioning precision in the CDMA mobile phones can be improved by utilizing the invention.

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