发明申请
US20130287080A1 SYSTEM AND METHOD OF FREQUENCY OFFSET COMPENSATION FOR RADIO SYSTEM WITH FAST DOPPLER SHIFT
有权
具有快速多普勒频移的无线电系统频率偏移补偿系统及方法
- 专利标题: SYSTEM AND METHOD OF FREQUENCY OFFSET COMPENSATION FOR RADIO SYSTEM WITH FAST DOPPLER SHIFT
- 专利标题(中): 具有快速多普勒频移的无线电系统频率偏移补偿系统及方法
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申请号: US13885260申请日: 2011-10-28
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公开(公告)号: US20130287080A1公开(公告)日: 2013-10-31
- 发明人: Jia-Ru Li , Meng-Chang Doong
- 申请人: Jia-Ru Li , Meng-Chang Doong
- 申请人地址: US CA Santa Clara
- 专利权人: Lilee Systems, LTD
- 当前专利权人: Lilee Systems, LTD
- 当前专利权人地址: US CA Santa Clara
- 国际申请: PCT/US2011/058399 WO 20111028
- 主分类号: H04W24/02
- IPC分类号: H04W24/02
摘要:
A system and method of frequency offset compensation are disclosed for a wireless system between a fast moving radio terminal associated with a locomotive and a stationary radio terminal associated with a base station. The present invention utilizes advanced frequency offset prediction to quickly track Doppler Shift caused by a fast moving locomotive. In one embodiment according to the present invention, the frequency offset prediction is based on a first plurality of coarse frequency offsets, first-order derivatives of the first plurality of coarse frequency offsets, and second-order derivatives of the first plurality of coarse frequency offsets. In another embodiment according to the present invention, the frequency offset prediction is based on a plurality of previous frequency offsets according to a Doppler shift model.
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