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A DUPLEX UNIT

  • US 20160134325A1
  • Filed: 06/18/2013
  • Published: 05/12/2016
  • Est. Priority Date: 06/18/2013
  • Status: Active Grant
First Claim
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1. A duplex unit for the simultaneous transmission and reception of microwave signals, the duplex unit comprising:

  • an interference canceller unit; and

    a control unit;

    wherein the interference canceller unit comprises;

    a duplex coupler with an antenna port, an input port, a first and a second output port and a return port; and

    a first adaptive filter;

    wherein the duplex coupler being is arranged to;

    receive a transmit signal at the input port and output a first part of the transmit signal at the antenna port, and suppress leakage of the transmit signal to the first output port; and

    output a second part of the transmit signal at the second output port to be received by the first adaptive filter;

    wherein the first adaptive filter is arranged to output a first filtered signal to the return port;

    wherein the duplex coupler is further arranged to receive a receive signal comprising a payload signal at the antenna port, and to output a combination of the receive signal and the first filtered signal as an interference suppressed receive signal on the first output port; and

    wherein the control unit is arranged to use the interference suppressed receive signal to adapt the first adaptive filter by a first control signal to make the interference suppressed receive signal equal to the payload signal.

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