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Downlink communication

  • US 8,259,780 B2
  • Filed: 12/28/2009
  • Issued: 09/04/2012
  • Est. Priority Date: 03/20/2009
  • Status: Active Grant
First Claim
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1. A method for conserving bandwidth in a communication system, the method comprising:

  • spreading a data frame using a first spreading factor, wherein the first spreading factor is based at least in part on a quality of a link with a tag;

    spreading a broadcast frame using a second spreading factor;

    generating a complex data stream having a first component and a second component, wherein the data frame is assigned to the first component and the broadcast frame is assigned to the second component; and

    transmitting the complex data stream to the tag.

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