发明名称 |
Method and apparatus for time and frequency synchronization of OFDM communication systems |
摘要 |
A method and apparatus for joint time and frequency synchronization for orthogonal frequency division multiplexing (OFDM) systems. A multitone pilot signal is sent in a designated OFDM symbol period. The receiver synchronizes to the pilot signal in a two-stage procedure. The first stage estimates the frequency offset coarsely with a frequency-domain correlation method and estimates the time offset with smoothed time-domain correlation. In a multipath channel, the smoothed time offset estimate is used to locate a cyclic prefix interval which captures the maximum total signal energy. The second stage improves the frequency estimate with a computationally efficient numerical optimization method.
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申请公布号 |
US7027429(B2) |
申请公布日期 |
2006.04.11 |
申请号 |
US20010884581 |
申请日期 |
2001.06.19 |
申请人 |
FLARION TECHNOLOGIES, INC. |
发明人 |
LAROIA RAJIV;LI JUNYI;RANGAN SUNDEEP;SAMPATH HEMANTH T. |
分类号 |
H04J3/06;H04L27/26 |
主分类号 |
H04J3/06 |
代理机构 |
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代理人 |
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地址 |
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