发明名称 |
Method of and apparatus for modulation of FSK carrier in a very narrow band |
摘要 |
A method and a transmitter system is provided for modulating binary information on a frequency shift keying carrier in a very narrow band. Phase reversal keying is initially used to create a carrier. The transmitter of the present invention generates a carrier signal by modulating a reference signal and a control signal having two frequencies representing the binary data to be transmitted. The resulting phase reversal carrier signal is processed by high order filtering such that the output of the transmitter provides a frequency shift keyed carrier at very close frequencies. The resulting carrier signal may, at the receiver, be processed by very narrow band filtering so as to create a communication system which will use only a small part of the available spectrum.
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申请公布号 |
US5852636(A) |
申请公布日期 |
1998.12.22 |
申请号 |
US19970908936 |
申请日期 |
1997.08.08 |
申请人 |
SERGE MATHIEU |
发明人 |
MATHIEU, SERGE;TREMBLAY, DOMINIC |
分类号 |
H04B1/04;(IPC1-7):H04B1/44 |
主分类号 |
H04B1/04 |
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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