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METHOD AND APPARATUS FOR PROCESSING SIGNAL

  • US 20110065406A1
  • Filed: 01/04/2010
  • Published: 03/17/2011
  • Est. Priority Date: 09/11/2009
  • Status: Active Grant
First Claim
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1. A signal processing method for a receiver comprising:

  • receiving an input signal within a first frequency range, the input signal including a desired signal and an interference signal;

    down-converting the input signal to a second frequency range using an offset local oscillator signal having a frequency substantially equal to a central frequency of the desired signal, wherein the second frequency range is lower than the first frequency range;

    separating the interference signal from the down-converted input signal;

    up-converting the separated interference signal to the first frequency range;

    subtracting the up-converted interference signal from the input signal at the first frequency range to obtain an interference removed signal; and

    down-converting the interference removed signal to a third frequency range for demodulating using a local oscillator signal, wherein the third frequency range is lower than the first frequency range and the frequency of the offset local oscillator signal is different from a frequency of the local oscillator signal.

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