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Quadrature receiver sampling architecture

  • US 7,596,189 B2
  • Filed: 11/06/2006
  • Issued: 09/29/2009
  • Est. Priority Date: 05/17/2002
  • Status: Active Grant
First Claim
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1. A communication device, comprising:

  • a multiplexor (MUX) configured to;

    receive an analog in-phase (I) stream;

    receive an analog quadrature (Q) stream; and

    output an analog stream that alternates between the analog I stream and the analog Q stream based upon a clocked selector input;

    an analog-to-digital converter (ADC) configured to;

    receive the analog stream; and

    sample the analog stream thereby generating a digital stream that includes alternating digital I information and digital Q information based upon the clocked selector input;

    a de-multiplexor (DE-MUX) configured to receive the digital stream that includes the alternating digital I information and the digital Q information and alternately extracting a digital I stream and a digital Q stream from the digital stream based upon a slower clock rate with respect to the clocked selector input; and

    a digital signal processor (DSP) configured to process at least one of the digital I stream and the digital Q stream to compensate for an alternating analog-to-digital conversion introduced effect thereon.

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