System and method for reduced deviation time domain FM/PM discriminator to achieve a reduced bandwidth frequency or phase modulation communications channels
First Claim
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1. A receiver for receiving a narrow frequency deviation frequency modulated or phase modulated base band signal comprising:
- a mixer for mixing the received narrow frequency deviation signal to generate an intermediate frequency signal;
a band pass filter for filtering the intermediate frequency signal;
a narrow band discriminator circuit that performs a time domain expansion of the modulation deviation of the intermediate frequency signal and discriminates the base band signal.
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Abstract
The present disclosure provides a receiver for receiving a narrow frequency deviation frequency modulated or phase modulated base band signal including a mixer for mixing the received narrow frequency deviation signal to generate an intermediate frequency signal, a band pass filter for filtering the intermediate frequency signal, and a narrow band discriminator circuit that performs a time domain expansion of the modulation deviation of the intermediate frequency signal and discriminates the base band signal.
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Citations
22 Claims
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1. A receiver for receiving a narrow frequency deviation frequency modulated or phase modulated base band signal comprising:
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a mixer for mixing the received narrow frequency deviation signal to generate an intermediate frequency signal;
a band pass filter for filtering the intermediate frequency signal;
a narrow band discriminator circuit that performs a time domain expansion of the modulation deviation of the intermediate frequency signal and discriminates the base band signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification