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Apparatus and method for removing DC offset in a frequency direct-conversion device

  • US 20050136874A1
  • Filed: 12/20/2004
  • Published: 06/23/2005
  • Est. Priority Date: 12/18/2003
  • Status: Active Grant
First Claim
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1. An apparatus for removing a DC offset during frequency direct conversion in a reception device of a wireless communication system, the apparatus comprising:

  • a first adder for receiving a DC corrupted digital baseband signal, receiving an estimated DC offset value, and calculating a difference between the DC corrupted digital baseband signal and the estimated DC offset value; and

    a DC offset calculator for receiving gain mode information of an analog element of the reception device, and calculating the estimated DC offset value according to the gain mode.

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