Method of sampling, downconverting, and digitizing bandpass signal using digital predictive coder

Method of sampling, downconverting, and digitizing bandpass signal using digital predictive coder

  • CN 1,214,576 A
  • Filed: 06/24/1998
  • Published: 04/21/1999
  • Est. Priority Date: 06/24/1997
  • Status: Abandoned Application
First Claim
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1. a down-conversion digital quantizer comprises:

  • With the variable gain amplifier of modulated carrier coupling, the latter comprises the automatic gain control loop that is used for controlling described variable gain amplifier gain;

    Double sampling predictive loop with the output of described variable gain amplifier coupling;

    Digital quadrature mixing device with described sampling predictive loop coupling;

    AndSpeed attentuating filter with each output coupling of described digital quadrature mixing device.

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