发明申请
- 专利标题: Method and Apparatus for Frequency Control in Wireless Communications
- 专利标题(中): 无线通信中频率控制的方法与装置
-
申请号: US12337964申请日: 2008-12-18
-
公开(公告)号: US20100159862A1公开(公告)日: 2010-06-24
- 发明人: Andres Reial , Bo Bernhardsson , Xiaohui Wang
- 申请人: Andres Reial , Bo Bernhardsson , Xiaohui Wang
- 申请人地址: SE Stockholm
- 专利权人: Telefonaktiebolaget LM Ericsson (publ)
- 当前专利权人: Telefonaktiebolaget LM Ericsson (publ)
- 当前专利权人地址: SE Stockholm
- 主分类号: H04B1/06
- IPC分类号: H04B1/06 ; H04B1/16
摘要:
The automatic frequency correction value applied by a receiver is altered to minimize long-term drift of a path delay profile. In one embodiment, the phase or timing error resulting from constant frequency corrections is accumulated, and an estimated frequency correction value is selectively quantized into an actual frequency correction value in response to the accumulated phase/timing error. The quantized value above or below the estimate is selected to minimize the accumulated phase/timing error that gives rise to path delay profile drift. In another embodiment, a timing circuit measures the instantaneous path delay profile drift incurred with each frequency correction, and integrates the instantaneous drift measurements over time to yield a path delay profile drift. The drift (or its rate of change) is then used to adjust a frequency correction value so as to minimize the drift.
公开/授权文献
信息查询