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WIDEBAND QUADRATURE ERROR CORRECTION

  • US 20150030102A1
  • Filed: 07/25/2013
  • Published: 01/29/2015
  • Est. Priority Date: 07/25/2013
  • Status: Active Grant
First Claim
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1. A transmission module comprising:

  • a switching module;

    a transmitter communicatively coupled to the switching module;

    a loopback receiver communicatively coupled to the switching module;

    a calibration module communicatively coupled to the switching module; and

    a controller communicatively coupled to the loopback receiver and the transmitter;

    wherein in a first state, the switching module is configured to provide a communication pathway between an output of the calibration module and an input of the loopback receiver, and the controller is configured to identify and correct quadrature imbalance in the loopback receiver based at least on a comparison of the output of the loopback receiver with an expected output;

    wherein in a second state, the switching module is configured to provide a communication pathway between an output of the transmitter and an input of the loopback receiver, and the controller is configured to;

    identify quadrature imbalance in the transmitter based at least partly on a comparison of a data signal received from the loopback receiver with a buffered data signal that corresponds to a data signal received by the transmitter, andadjust one or more characteristics of the transmitter to correct the identified quadrature imbalance present in the transmitter based at least partly on the comparison.

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