发明名称 |
Residual frequency error estimation in an OFDM receiver |
摘要 |
An OFDM receiver configured for measuring frequency error based on comparing prescribed pilot tones from a prescribed group of consecutive symbols in a received OFDM signal. A complex conjugate generator is configured for generating complex conjugates of the prescribed pilot tones of a first subgroup of the consecutive symbols. A multiplier is configured for generating a complex pilot product, for each symbol subgroup position, by multiplying the pilot tones of a second subgroup symbol at the corresponding symbol subgroup position with the respective complex conjugates of the first subgroup symbol at the corresponding symbol subgroup position. A complex summation circuit sums the complex pilot products of the symbol subgroup positions to obtain an accumulated complex value. A error calculator calculates the frequency error from the accumulated complex value for use in correcting frequency offset.
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申请公布号 |
US2005122895(A1) |
申请公布日期 |
2005.06.09 |
申请号 |
US20030727670 |
申请日期 |
2003.12.05 |
申请人 |
ZHOU XU;CHEN CHIHMING (.;HSUEH CHIH (.;CANELONES ORLANDO |
发明人 |
ZHOU XU;CHEN CHIHMING (.;HSUEH CHIH (.;CANELONES ORLANDO |
分类号 |
H04L27/26;(IPC1-7):H04J11/00 |
主分类号 |
H04L27/26 |
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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