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GAIN CONTROL METHOD AND APPARATUS

  • US 20080240259A1
  • Filed: 06/09/2008
  • Published: 10/02/2008
  • Est. Priority Date: 06/11/2002
  • Status: Active Grant
First Claim
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1. A gain controller comprising:

  • a first delay circuit configured to receive an in-phase (I) signal and output a delayed I signal;

    a second delay circuit configured to receive a quadrature (Q) signal and output a delayed Q signal;

    a normalization circuit for adjusting the gain of the received I and Q signals on a block-by-block basis as a function of averaged combined signal strength measurements of the received I and Q signals;

    a first multiplier having a first input electrically coupled to an output of the first delay circuit, and a second input electrically coupled to an output of the normalization circuit used to adjust the gain of the delayed I signal, wherein the first multiplier outputs a value substantially equal to the delayed I signal divided by the averaged combined signal strength of the received I and Q signals; and

    a second multiplier having a first input electrically coupled to an output of the second delay circuit, and a second input electrically coupled to an output of the normalization circuit used to adjust the gain of the delayed Q signal, wherein the second multiplier outputs a value substantially equal to the delayed Q signal divided by the averaged combined signal strength of the received I and Q signals.

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