发明授权
- 专利标题: Non-coherent quadrature demodulation of MSK signals
- 专利标题(中): MSK信号的非相干正交解调
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申请号: US70486申请日: 1993-06-02
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公开(公告)号: US5309480A公开(公告)日: 1994-05-03
- 发明人: Clinton C. Powell, II , Joseph Boccuzzi
- 申请人: Clinton C. Powell, II , Joseph Boccuzzi
- 申请人地址: IL Schaumburg
- 专利权人: Motorola, Inc.
- 当前专利权人: Motorola, Inc.
- 当前专利权人地址: IL Schaumburg
- 主分类号: H04L27/233
- IPC分类号: H04L27/233 ; H04L27/14
摘要:
Briefly, according to the invention, a receiver (100) for receiving a carrier signal MSK (minimum shift keying) modulated with a bit stream of a digital information signal (302) is disclosed. The receiver (100) comprises a quadrature demodulator (128) for providing baseband quadrature demodulated signals (306 and 308). The quadrature demodulated (128) is coupled to an EXOR (126) for providing a decoded bit stream of the digital information signal (312) thereby avoiding complex decoder circuits. The quadrature demodulator (128) includes a pair of mixers (106 and 108) for quadrature mixing the received carrier signal and a pair of filters (114 and 118) for filtering the outputs of the mixers (106 and 108). The filters (114 and 118) are coupled to a pair of limiters (116 and 120) for limiting the filtered signals.
公开/授权文献
- USD394379S Holdback for drapery curtain 公开/授权日:1998-05-19
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