发明公开
- 专利标题： COARSE FREQUENCY SYNCHRONISATION IN MULTICARRIER SYSTEMS
- 专利标题（中）： 多载波系统中的粗频率同步
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申请号： EP98920519.0申请日： 1998-04-14
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公开(公告)号： EP1072137A1公开(公告)日： 2001-01-31
- 发明人: EBERLEIN, Ernst , BADRI, Sabah , LIPP, Stefan , BUCHHOLZ, Stephan , HEUBERGER, Albert , GERHÄUSER, Heinz
- 申请人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DERANGEWANDTEN FORSCHUNG E.V.
- 申请人地址： Leonrodstrasse 54 80636 München DE
- 专利权人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DERANGEWANDTEN FORSCHUNG E.V.
- 当前专利权人： FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DERANGEWANDTEN FORSCHUNG E.V.
- 当前专利权人地址： Leonrodstrasse 54 80636 München DE
- 代理机构： Schoppe, Fritz, Dipl.-Ing.
- 国际公布： WO9953666 19991021
- 主分类号： H04L27/26
- IPC分类号： H04L27/26
摘要：
For performing a coarse frequency synchronization compensating for a carrier frequency deviation from an oscillator frequency in a demodulation system (130) capable of demodulating a signal having a frame structure, the frame structure comprising at least one useful symbol (162) and a reference symbol (166) which is an amplitude-modulated sequence, firstly the signal is received. Thereafter, the received signal is down-converted. Then, an amplitude-demodulation of the down-converted signal is performed in order to generate an envelope. This envelope is correlated with a predetermined reference pattern in order to determine the carrier frequency deviation. Finally, the oscillator frequency is controlled based on the carrier frequency deviation. The reference symbol may comprise two identical sequences (300). In this case, the envelope obtained by the amplitude-demodulation has two portions which are based on the identical sequences (300). One of the portions of the envelope is correlated with the other one of the portions in order to determine the carrier frequence deviation. The oscillator frequency is controlled based on the determined carrier frequency deviation.
公开/授权文献
- EP1072137B1 COARSE FREQUENCY SYNCHRONISATION IN MULTICARRIER SYSTEMS 公开/授权日：2001-10-24
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