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Method and apparatus for detecting zero rate frames in a communications system

  • US 6,208,699 B1
  • Filed: 09/01/1999
  • Issued: 03/27/2001
  • Est. Priority Date: 09/01/1999
  • Status: Expired due to Term
First Claim
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1. A method for identifying zero rate frames in a received data transmission, the method comprising:

  • receiving a modulated signal;

    demodulating the modulated signal in accordance with a particular demodulation format to generate demodulated symbols;

    partitioning the demodulated symbols into a plurality of received frames;

    computing a quality metric for each of the plurality of received frames;

    comparing the quality metric for a particular received frame against a threshold value, wherein the threshold value is selected based, in part, on the quality metrics of received frames; and

    identifying the particular received frame as being a zero rate frame or not a zero rate frame based on the comparing.

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