发明授权
- 专利标题: Apparatus and method for estimating frequency offset in orthogonal frequency division multiplexing system
- 专利标题(中): 在正交频分复用系统中估计频偏的装置和方法
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申请号: US11401484申请日: 2006-04-11
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公开(公告)号: US07643566B2公开(公告)日: 2010-01-05
- 发明人: Jong-Yoon Hwang , Kwang-Soon Kim , Keum-Chan Whang
- 申请人: Jong-Yoon Hwang , Kwang-Soon Kim , Keum-Chan Whang
- 申请人地址: KR Suwon-si
- 专利权人: Samsung Electronics Co., Ltd.
- 当前专利权人: Samsung Electronics Co., Ltd.
- 当前专利权人地址: KR Suwon-si
- 代理机构: Roylance, Abrams, Berdo & Goodman, LLP
- 优先权: KR10-2005-0029986 20050411
- 主分类号: H04K1/10
- IPC分类号: H04K1/10
摘要:
An apparatus and method for estimating a frequency offset in an Orthogonal Frequency Division Multiplexing (OFDM) system are provided. Two time domain signals are generated from one received OFDM symbol through two observation windows with different delay times. The two time domain signals are compensated for a candidate frequency offset. A discrete Fourier transform process and a phase compensation process in a frequency domain are performed. A difference between two frequency domain signals compensated for a phase difference is computed with respect to each candidate frequency offset. For all candidate frequency offsets, difference values are compared with each other. A candidate frequency offset mapped to a minimum difference value is detected as an optimal frequency offset. The frequency offset can be more exactly estimated without consuming a bandwidth and increasing hardware complexity of a receiver.
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