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RF fiber optic transmission utilizing dither

  • US 5,598,288 A
  • Filed: 07/31/1995
  • Issued: 01/28/1997
  • Est. Priority Date: 07/31/1995
  • Status: Expired due to Term
First Claim
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1. A fiber optic RF link comprising:

  • means for introducing an RF signal, including multiple narrow band signal components, to a summing junction;

    a noise source for generating a dither signal;

    means connected to the output of the noise source for amplifying the dither signal prior to its introduction to the summing junction;

    means located at the summing junction for adding the RF signal and the dither signal to create a dithered RF signal to be transmitted;

    amplitude limiting means connected at its input to the output of the summing junction for linearly quantizing the dithered RF signal to two levels;

    fiber optic transmitter means connected at its input to an output of the limiting means for converting the dithered RF signal from an electrical to optical form;

    a fiber optic cable connected at its input to an output of the fiber optic transmitter for propagating the dithered RF signal;

    fiber optic receiver means, connected at its input to the output of the cable, for reconverting the dithered RF signal from optical to electrical form; and

    a narrow bandpass filter means connected at its input to an output of the fiber optic receiver and having a narrow bandwidth centered at the frequency of the RF signal for removing the dither signal and recovering the original RF signal.

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