发明名称 |
System and method for superheterodyne frequency multiplication signal expansion to achieve a reduced bandwidth frequency or phase modulation communication channel |
摘要 |
The present disclosure provides a method and apparatus for communicating a base band signal via a communication channel that connects a transmitter to a receiver comprising the steps of modulating the base band signal into a low frequency deviation modulated signal, transmitting the low frequency deviation modulated signal with a transmitter, receiving the low frequency deviation modulated signal with a receiver, mixing the received signal to an intermediate frequency signal, multiplying the intermediate frequency signal by to a multiplied frequency signal, multiplying a reference signal having a frequency generally equal to the center frequency of the intermediate frequency signal by a multiple that is one greater than or one less than the multiplied frequency signal to create a reference multiplied frequency signal, subtracting the reference multiplied frequency signal from the multiplied frequency signal to generate a wide band frequency signal, and discriminating the wide band frequency signal to obtain the base band signal.
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申请公布号 |
US6917787(B2) |
申请公布日期 |
2005.07.12 |
申请号 |
US20020264397 |
申请日期 |
2002.10.04 |
申请人 |
DEVANEY, II PATRICK OWEN;HERR ALAN JACK |
发明人 |
DEVANEY, II PATRICK OWEN;HERR ALAN JACK |
分类号 |
H03C3/09;H03D3/04;(IPC1-7):H04B7/00;H04B1/00;H04B1/26 |
主分类号 |
H03C3/09 |
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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