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Digital control of a linc linear power amplifier

  • US 6,054,894 A
  • Filed: 06/19/1998
  • Issued: 04/25/2000
  • Est. Priority Date: 06/19/1998
  • Status: Expired due to Term
First Claim
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1. In a LINC power amplifier, an adaptive method for compensating for an unwanted difference between analog signal paths, comprising:

  • (a) separating an input transmission signal into at least first and second component signals having envelopes of varying phase and substantially constant amplitude;

    (b) amplifying the component signals along respective first and second analog signal paths;

    (c) combining the component signals following amplification to produce an output signal;

    (d) monitoring and digitally processing at least (i) the component signals prior to amplification, and (ii) the output signal, to generate compensation parameters; and

    (e) modifying the first and second component signals prior to amplification thereof, based on the compensation parameters, to reduce distortion caused by said unwanted difference.

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