发明授权
- 专利标题: System and method for doppler frequency estimation
- 专利标题(中): 多普勒频率估计的系统和方法
-
申请号: US12277247申请日: 2008-11-24
-
公开(公告)号: US08149905B1公开(公告)日: 2012-04-03
- 发明人: Hao-Ren Cheng , Gaspar Lee , Chih-Yuan Chu
- 申请人: Hao-Ren Cheng , Gaspar Lee , Chih-Yuan Chu
- 申请人地址: US CA San Jose
- 专利权人: Qualcomm Atheros, Inc.
- 当前专利权人: Qualcomm Atheros, Inc.
- 当前专利权人地址: US CA San Jose
- 代理机构: Bever, Hoffman & Harms, LLP
- 主分类号: H04B3/46
- IPC分类号: H04B3/46 ; H04B17/00 ; H04Q1/20
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.
信息查询