发明名称 |
RESIDUAL FREQUENCY ERROR ESTIMATION IN AN OFDM RECEIVER |
摘要 |
An OFDM receiver (50) configured for measuring frequency error (124) based on comparing prescribed pilot tones (114) from a prescribed group of consecutive symbols (112) in a received OFDM signal. A complex conjugate generator (104) is configured for generating complex conjugates of the prescribed pilot tones of a first subgroup (118a) of the consecutive symbols. A multiplier (106) is configured for generating a complex pilot product (120), 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 (108) sums the complex pilot products of the symbol subgroup positions to obtain an accumulated complex value (122). A error calculator (110) calculates the frequency error from the accumulated complex value for use in correcting frequency offset. ® KIPO & WIPO 2007
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申请公布号 |
KR20070008531(A) |
申请公布日期 |
2007.01.17 |
申请号 |
KR20067011091 |
申请日期 |
2006.06.05 |
申请人 |
ADVANCED MICRO DEVICES, INC. |
发明人 |
ZHOU XU;CHEN CHIHMING (NORMAN);HSUEH CHIH (REX);CANELONES ORLANDO |
分类号 |
H04L27/26 |
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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