发明申请
- 专利标题: Method and apparatus for automatic frequency correction
- 专利标题(中): 自动频率校正方法和装置
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申请号: US11326043申请日: 2006-01-05
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公开(公告)号: US20060233153A1公开(公告)日: 2006-10-19
- 发明人: Jian Cheng , Jingdong Lin
- 申请人: Jian Cheng , Jingdong Lin
- 申请人地址: US CA Sunnyvale
- 专利权人: Spreadtrum Communications Corporation
- 当前专利权人: Spreadtrum Communications Corporation
- 当前专利权人地址: US CA Sunnyvale
- 优先权: CN200510025100.0 20050415
- 主分类号: H04J3/06
- IPC分类号: H04J3/06
摘要:
A technique is provided for automatic frequency offset correction in a wireless communication system. After demodulating and decoding a received signal in a receiver, channel estimation is also performed. The technique further includes re-encoding and re-modulating the decoded and demodulated signal with a coding and modulation scheme different from the received signal. The signal is reconstructed signal on the basis of the re-encoded and re-modulated signal and estimated channel characteristics. A frequency error is estimated based on the reconstructed signal and the original received signal. A threshold for a comparator is determined on the basis of the estimated offset amount determined by the comparison threshold and the estimated frequency offset.
公开/授权文献
- US07725090B2 Method and apparatus for automatic frequency correction 公开/授权日:2010-05-25
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