Invention Grant
US08913651B2 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的频偏补偿系统和方法
- Patent Title: System and method of frequency offset compensation for radio system with fast doppler shift
- Patent Title (中): 具有快速多普勒频移的无线电系统的频偏补偿系统和方法
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Application No.: US13885260Application Date: 2011-10-28
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Publication No.: US08913651B2Publication Date: 2014-12-16
- Inventor: Jia-Ru Li , Meng-Chang Doong
- Applicant: Jia-Ru Li , Meng-Chang Doong
- Applicant Address: US CA Santa Clara
- Assignee: Lilee Systems, Ltd.
- Current Assignee: Lilee Systems, Ltd.
- Current Assignee Address: US CA Santa Clara
- Agency: Blairtech Solution LLC
- International Application: PCT/US2011/058399 WO 20111028
- International Announcement: WO2012/058600 WO 20120503
- Main IPC: H04B3/46
- IPC: H04B3/46 ; H04W24/02 ; H04L27/00

Abstract:
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.
Public/Granted literature
- US20130287080A1 SYSTEM AND METHOD OF FREQUENCY OFFSET COMPENSATION FOR RADIO SYSTEM WITH FAST DOPPLER SHIFT Public/Granted day:2013-10-31
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