发明授权
US5907528A Apparatus for demodulating a digital FM signal which normally has signal
inversions at data bit boundaries
失效
用于解调通常在数据位边界处具有信号反相的数字FM信号的装置
- 专利标题： Apparatus for demodulating a digital FM signal which normally has signal inversions at data bit boundaries
- 专利标题（中）： 用于解调通常在数据位边界处具有信号反相的数字FM信号的装置
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申请号： US665884申请日： 1996-06-19
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公开(公告)号： US5907528A公开(公告)日： 1999-05-25
- 发明人: Yoshiro Joichi
- 申请人： Yoshiro Joichi
- 申请人地址： JPX Tokyo
- 专利权人： Sony Corporation
- 当前专利权人： Sony Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX7-176748 19950620
- 主分类号： G11B7/0037
- IPC分类号： G11B7/0037 ; G11B7/007 ; G11B11/10 ; G11B11/105 ; G11B20/02 ; G11B20/06 ; G11B20/14 ; G11B20/18 ; H04M5/76
摘要：
In a demodulator for a digital FM signal, the received digital FM signal is verified at the data bit boundaries for inversion to detect errors. If an uninverted data bit boundary is detected, those sections of the digital FM signal just preceding and just following the uninverted data bit boundary are modified thereby generating two modified signals. Using the error detecting code included in the digital FM signal, the two modified signals are evaluated to determine which modification corrects the errors and the modified signal with the correct modification is selected.
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