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Type-based baseband predistorter function estimation technique for non-linear circuits

  • US 6,885,241 B2
  • Filed: 03/26/2003
  • Issued: 04/26/2005
  • Est. Priority Date: 03/26/2002
  • Status: Expired due to Fees
First Claim
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1. A method of compensating for non-linear conversion distortions of a circuit comprising the steps of:

  • (a) providing a reference type information for an input signal being provided to the circuit;

    (b1) mapping of the input signal to form a mapped signal; and

    , (b2) pulse shaping of the mapped signal, where the reference type information is based on a known pulse shaping function;

    (c) sampling a portion of an output signal to provide a plurality of values relating to a parameter thereof, each at a different time;

    (d) deriving predistortion information based on the reference type information and the plurality of values; and

    (e) predistorting one of the pulse shaped signal and the input signal being provided to the circuit in dependence upon the predistortion information.

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