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Adaptive radio-frequency interference cancelling device, method, and receiver

  • US 9,270,308 B2
  • Filed: 07/02/2015
  • Issued: 02/23/2016
  • Est. Priority Date: 01/05/2013
  • Status: Active Grant
First Claim
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1. An adaptive radio-frequency interference cancelling device, comprising:

  • an amplitude phase adjusting module, configured to adjust an amplitude and a phase of a radio-frequency reference signal, output a radio-frequency adjustment signal to a subtractor, to enable the radio-frequency adjustment signal to converge to a self-interference signal in a radio-frequency received signal;

    the subtractor, configured to receive the radio-frequency received signal and the radio-frequency adjustment signal output by the amplitude phase adjusting module, and output a radio-frequency residual signal, wherein the radio-frequency residual signal is a difference signal between the radio-frequency received signal and the radio-frequency adjustment signal; and

    a baseband extracting and filtering module, configured to receive the radio-frequency reference signal and the radio-frequency residual signal output by the subtractor, extract baseband signals and perform least mean squares adaptive filtering processing on the baseband signals to obtain an amplitude phase control signal and output to the amplitude phase adjusting module, wherein the amplitude phase control signal is used to control the amplitude phase adjusting module to adjust the amplitude and the phase of the radio-frequency reference signal.

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