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Apparatus and method for calibrating local oscillation frequency in wireless communications

  • US 20020123316A1
  • Filed: 03/12/2001
  • Published: 09/05/2002
  • Est. Priority Date: 01/09/2001
  • Status: Active Grant
First Claim
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1. A receiver comprising a digital automatic frequency control loop configured to receive a baseband input signal having a first frequency, said digital automatic frequency control loop comprising a frequency error discriminator, said frequency error discriminator being configured to produce an error measure, said digital automatic frequency control loop further comprising:

  • a digital rotator configured to receive said baseband input signal having said first frequency, said digital rotator providing a rotated digital baseband output to said frequency error discriminator for producing said error measure.

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