发明授权
- 专利标题: Pilot-assisted doppler frequency estimation
- 专利标题(中): 导频辅助多普勒频率估计
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申请号: US11289943申请日: 2005-11-30
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公开(公告)号: US08311132B2公开(公告)日: 2012-11-13
- 发明人: Adriel P. Kind
- 申请人: Adriel P. Kind
- 申请人地址: US PA Allentown
- 专利权人: Agere Systems Inc.
- 当前专利权人: Agere Systems Inc.
- 当前专利权人地址: US PA Allentown
- 代理机构: Mendelsohn, Drucker & Associates, P.C.
- 代理商 Kevin M. Drucker; Steve Mendelsohn
- 主分类号: H04K1/10
- IPC分类号: H04K1/10 ; H04L27/28
摘要:
A technique for estimating the Doppler frequency of an input signal comprising a pilot signal. In one embodiment, the technique comprises: (a) accumulating a plurality of samples from the input signal over a specified time duration to derive a channel tap estimate; (b) obtaining a sequence of channel tap estimates by repeating step (a) until a specified number of channel tap estimates have been accumulated; (c) performing a Fourier transform of the sequence of channel tap estimates to obtain a complex sequence of values; (d) finding the smallest index value for which a power spectral distribution function of the complex sequence of values exceeds a specified threshold; and (e) obtaining an estimate of the Doppler frequency by dividing the smallest index value found in step (d) by the product of the specified number of channel tap estimates and the specified time duration.
公开/授权文献
- US20070121739A1 Pilot-assisted doppler frequency estimation 公开/授权日:2007-05-31
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