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System and method for adaptive DC offset compensation in wireless transmissions

  • US 7,400,869 B2
  • Filed: 03/22/2005
  • Issued: 07/15/2008
  • Est. Priority Date: 03/22/2005
  • Status: Expired due to Fees
First Claim
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1. A method comprising:

  • determining, during a first expected idle period of a received signal, a first direct current (DC) component of a first amplified representation of the received signal at an output of an amplifier, wherein the amplifier is set to a first gain setting;

    determining, during a second expected idle period of the received signal, a second DC component of a second amplified representation of the received signal at the output of the amplifier, wherein the amplifier is set to the first gain setting;

    determining whether a transmission burst preceding the second idle period is a valid transmission burst;

    when the transmission burst is determined as valid;

    determining a first average DC component based at least in part on the first and second DC components; and

    adjusting a DC offset used by the amplifier when set to the first gain setting based on a comparison of the first average DC component to one or more threshold values; and

    when the transmission burst is determined as invalid;

    determining a second average DC component based at least in part on the first DC component but not the second DC component; and

    adjusting the DC offset used by the amplifier when set to the first gain setting based on a comparison of the second average DC component to one or more threshold values.

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