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System and method for determining and controlling gain margin in an RF repeater

  • US RE47,075 E1
  • Filed: 02/03/2017
  • Issued: 10/02/2018
  • Est. Priority Date: 12/11/2009
  • Status: Active Grant
First Claim
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1. An apparatus for repeating signals, the apparatus comprising:

  • a receive antenna for capturing a receive signal that includes an input signal and a feedback signal;

    processing circuitry coupled with the receive antenna for processing the receive signal to form a repeated signal;

    a transmit antenna coupled with the processing circuitry for transmitting the repeated signal;

    the processing circuitry for processing the receive signal including;

    gain circuitry to provide gain in the repeated signal;

    decorrelation circuitry including frequency shifting circuitry that is configured for decorrelating the input signal of the receive signal and the repeated signal by introducing a frequency shift in the repeated signal to form the repeated signal that is decorellated and frequency-shifted from the input signal of the receive signal;

    gain margin circuitry configured for calculating a gain margin for the apparatus by utilizing samples of the decorrelated receive signal and the frequency-shifted repeated signal and utilizing samples of the repeated signal wherein the frequency shift that is used to decorrelate the receive and repeated signals has been removed.

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