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Method, apparatus and system for eliminating self-interference in a full-duplex communication

  • US 9,712,314 B2
  • Filed: 03/05/2015
  • Issued: 07/18/2017
  • Est. Priority Date: 09/07/2012
  • Status: Active Grant
First Claim
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1. A method for processing an interference signal, the method comprising:

  • receiving a radio signal comprising a self-interference signal of a transmit antenna, the self-interference signal comprises a first self-interference signal and a second self-interference signal, power of the first self-interference signal is greater than a first power threshold, a time delay of the first self-interference signal is less than a first time delay threshold, power of the second self-interference signal is less than the first power threshold and greater than a second power threshold, and a time delay of the second self-interference signal is greater than the first time delay threshold and less than a second time delay threshold;

    performing primary interference cancellation processing, by using a first reference signal, on the received radio signal to eliminate the first self-interference signal, wherein the first reference signal is obtained by coupling a local transmit signal; and

    performing secondary interference cancellation processing, by using a second reference signal, on the received radio signal after the primary interference cancellation processing to eliminate the second self-interference signal, wherein the second reference signal is obtained by coupling a local transmit signal.

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