发明授权
- 专利标题: Method for OFDM and OFDMA channel estimation
- 专利标题(中): OFDM和OFDMA信道估计方法
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申请号: US12118063申请日: 2008-05-09
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公开(公告)号: US08218658B2公开(公告)日: 2012-07-10
- 发明人: Kun-Chien Hung , David W. Lin
- 申请人: Kun-Chien Hung , David W. Lin
- 申请人地址: TW Hsinchu
- 专利权人: National Chiao Tung University
- 当前专利权人: National Chiao Tung University
- 当前专利权人地址: TW Hsinchu
- 代理机构: Muncy, Geissler, Olds & Lowe, PLLC
- 优先权: TW97108535A 20080311
- 主分类号: H04L27/28
- IPC分类号: H04L27/28
摘要:
This invention discloses a method for OFDM and OFDMA channel estimation via phase-rotated polynomial interpolation and extrapolation (inter/extra-polation). For complexity reason, polynomial inter/extra-polation is an often considered method for channel estimation in orthogonal frequency-division multiplexing (OFDM) and orthogonal frequency-division multiple access (OFDMA) systems, in which the simplest choice is linear inter/extra-polation. But the performance of this method depends on the accuracy of symbol timing estimation as well as the channel delay spread. The invention mitigates the problem by adding a linear phase factor to polynomial inter/extra-polation, which corresponds to adding a delay (also called delay shift) in the time domain.
公开/授权文献
- US20090232230A1 METHOD FOR OFDM AND OFDMA CHANNEL ESTIMATION 公开/授权日:2009-09-17