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Method to track analog gain step magnitudes online during operation of wireless mobile devices

  • US 7,873,340 B2
  • Filed: 03/10/2006
  • Issued: 01/18/2011
  • Est. Priority Date: 03/10/2005
  • Status: Active Grant
First Claim
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1. A method to track gain step magnitudes in an automatic gain control (AGC) module of a receiver, the method comprising:

  • storing one or more nominal gain step magnitudes for at least one amplifier;

    adjusting a gain state of the at least one amplifier in one or more stored nominal gain steps;

    monitoring output energy of the AGC module after at least one gain state adjustment;

    calculating a mismatch between nominal gain step magnitudes and actual gain step magnitudes of the at least one amplifier based in part on the output energy of the AGC module; and

    updating the stored one or more nominal gain step magnitudes to track the actual gain step magnitudes of the at least one amplifier by multiplying the gain step magnitude mismatch by a loop gain, the loop gain based in part on power fluctuation across a received signal.

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