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Systems and methods for combining signals from multiple active wireless receivers

  • US 8,570,920 B2
  • Filed: 09/28/2011
  • Issued: 10/29/2013
  • Est. Priority Date: 09/30/2010
  • Status: Active Grant
First Claim
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1. A system, comprising:

  • a first receiving radio frequency unit comprising;

    a first downconverter configured to downconvert a received signal from a first antenna to an intermediate frequency to create an intermediate frequency signal;

    a phase comparator configured to mix the received signal and an oscillating signal from the first downconverter to create a mixed signal, compare a phase of the mixed signal to a predetermined phase, and generate a phase control signal based on the comparison;

    a phase adjuster configured to alter the phase of the intermediate frequency signal based on the phase control signal from the phase comparator;

    a second downconverter configured to downconvert the phase-shifted intermediate frequency signal to create an output signal; and

    a waveguide configured to receive the received signal from the first antenna and provide the received signal to the first downconverter.

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