发明名称 |
METHODS AND APPARATUS FOR TIMING SYNCHRONIZATION BASED ON TRANSITIONAL PILOT SYMBOLS |
摘要 |
<p>Methods and apparatus for timing synchronization based on transitional pilot symbols. In an aspect, a method is provided for time tracking synchronization in an OFDM system. The method includes receiving at least one TDM pilot symbol comprising a plurality of modulated sub-carriers that are configured to provide a channel estimate having a length that extends up to a duration of an FFT used for data transmission. The method also includes determining one or both of an instantaneous and averaged channel estimates from the plurality of modulated sub-carriers, and calculating a timing offset based on one or both of the channel estimates. An apparatus includes a receiver configured to receive the at least one TDM pilot symbol, a channel estimator configured to determine the instantaneous and averaged channel estimates, and a time synchronizer configured to calculate a timing offset based on the channel estimates.</p> |
申请公布号 |
EP2127286(A2) |
申请公布日期 |
2009.12.02 |
申请号 |
EP20080713550 |
申请日期 |
2008.01.04 |
申请人 |
QUALCOMM INCORPORATED |
发明人 |
VRCELJ, BOJAN;MUKKAVILLI, KRISHNA KIRAN;MANTRAVADI, ASHOK;KRISHNAMOORTHI, RAGHURAMAN |
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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