发明授权
- 专利标题: Compensation for frequency adjustment in mobile communication-positioning device with shared oscillator
- 专利标题(中): 具有共享振荡器的移动通信定位设备的频率调整补偿
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申请号: US10718821申请日: 2003-11-21
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公开(公告)号: US07299024B2公开(公告)日: 2007-11-20
- 发明人: L. Scott Bloebaum , Piyush Bharti , Sherk Chung , Benjamin Van Roy , Wallace Mann
- 申请人: L. Scott Bloebaum , Piyush Bharti , Sherk Chung , Benjamin Van Roy , Wallace Mann
- 申请人地址: US CA San Jose
- 专利权人: SiRF Technology, Inc.
- 当前专利权人: SiRF Technology, Inc.
- 当前专利权人地址: US CA San Jose
- 代理机构: MacPherson Kwok Chen & Heid LLP
- 代理商 Jonathan W. Hallman
- 主分类号: H04B1/06
- IPC分类号: H04B1/06
摘要:
In a mobile communication device, a method for compensating for a frequency adjustment in an oscillator shared between a communication circuit and a positioning signal receiver is provided. In one embodiment, a method for determining the operating frequency of an oscillator detects a beginning time point of a reference signal received by the mobile communication device and enables a counter to count in step with a clock signal derived from the oscillator. When an ending time point of the reference signal is received by the mobile communication device, the count is stopped, and the frequency of the oscillator is determined based on the count in the counter and an expected time that elapsed between the beginning time point and the ending time point.