发明名称 |
System and method for doppler frequency estimation |
摘要 |
A method and apparatus in a multiple sub-carrier digital communication receiver estimates a Doppler frequency bandwidth. The Doppler frequency bandwidth is estimated by comparing a first set of channel estimates to a second set of channel estimates generated by Wiener filter interpolation of the first set of channel estimates. The Wiener interpolation filter coefficients are generated for various Doppler frequency bandwidths. Pre-determined transmit pilot symbols may be used to generate the first set of channel estimates in an OFDM communication system. A set of Wiener filter interpolation errors may be generated at one or more sub-carrier frequencies, for each of the different Doppler frequency bandwidths, and averaged across time and/or frequency. The Doppler frequency estimation method and apparatus may select a Doppler frequency estimate based on the set of Wiener filter interpolation errors. |
申请公布号 |
US8149905(B1) |
申请公布日期 |
2012.04.03 |
申请号 |
US20080277247 |
申请日期 |
2008.11.24 |
申请人 |
CHENG HAO-REN;LEE GASPAR;CHU CHIH-YUAN;QUALCOMM ATHEROS, INC. |
发明人 |
CHENG HAO-REN;LEE GASPAR;CHU CHIH-YUAN |
分类号 |
H04B3/46;H04B17/00;H04Q1/20 |
主分类号 |
H04B3/46 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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