Telecommunications – Transmitter and receiver at separate stations – With control signal
Reexamination Certificate
2005-07-12
2005-07-12
Nguyen, Simon (Department: 2685)
Telecommunications
Transmitter and receiver at separate stations
With control signal
C455S072000, C455S205000, C455S215000, C455S315000, C455S323000, C455S336000, C375S320000, C375S324000
Reexamination Certificate
active
06917787
ABSTRACT:
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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Devaney, II Patrick Owen
Herr Alan Jack
Nguyen Simon
Polster Lieder Woodruff & Lucchesi L.C.
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