发明公开
- 专利标题: CARRIER RECOVERY IN DAB RECIEVERS
- 专利标题(中): 载波恢复在接收器数字TONRUNDFUNKSIGNALE
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申请号: EP98919561.5申请日: 1998-05-12
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公开(公告)号: EP0985304A1公开(公告)日: 2000-03-15
- 发明人: KATSUMOTO, Hiroshi
- 申请人: KABUSHIKI KAISHA KENWOOD
- 申请人地址: 14-6 Dougenzaka 1-chome Shibuya-ku,Tokyo 150-0043 JP
- 专利权人: KABUSHIKI KAISHA KENWOOD
- 当前专利权人: KABUSHIKI KAISHA KENWOOD
- 当前专利权人地址: 14-6 Dougenzaka 1-chome Shibuya-ku,Tokyo 150-0043 JP
- 代理机构: Patentanwälte Leinweber & Zimmermann
- 优先权: JP15313697 19970528
- 国际公布: WO9854875 19981203
- 主分类号: H04L27/26
- IPC分类号: H04L27/26
摘要:
A receiver is provided which can perform normal reception even under strict environments such as multi-path environments. A frequency offset detector (7) detects a frequency offset amount in accordance with a phase reference symbol. The detected frequency offset value is integrated by an integrator (17). The integrated value is compared by a comparator (18) with a predetermined threshold value range. If the integrated value output from the integrator is in the threshold value range, a frequency offset value amount detected by another frequency offset detector (8) in accordance with a phase difference of a delay-detection output is selected by a switch circuit (10). If the integrated value is not in the threshold value range, the frequency offset value detected by the frequency offset detector (7) is selected by the switch circuit (10). In accordance with each selected frequency offset value, automatic frequency control of the receiver is performed.
公开/授权文献
- EP0985304B8 CARRIER RECOVERY IN DAB RECIEVERS 公开/授权日:2006-08-02
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