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Multiple interferer cancellation for communications systems

  • US 9,577,687 B2
  • Filed: 04/26/2016
  • Issued: 02/21/2017
  • Est. Priority Date: 05/21/2012
  • Status: Active Grant
First Claim
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1. An interference cancellation system (ICS) comprising:

  • radio frequency (RF) circuitry configured to receive a plurality of RF interference signals and a combined signal, the combined signal comprising a combination of a signal of interest (SOI) and at least the plurality of RF interference signals, andcombine the plurality of RF interference signals into an aggregate RF interference signal;

    optical circuitry configured to;

    convert the aggregate RF interference signal to an aggregate optical interference signal,convert the combined signal to an optical combined signal,apply a 180 phase shift to one of the aggregate optical interference signal or the optical combined signal,attenuate and apply a time delay to at least one of the aggregate optical interference signal or the optical combined signal;

    combine the aggregate optical interference signal and the optical combined signal to generate an optical output signal, andconvert the optical output signal to an RF output signal; and

    a processor configured to control the attenuation and time delay applied to at least one of the aggregate optical interference signal or the optical combined signal.

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