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Method and apparatus for data transfer using a time division multiple frequency scheme supplemented with polarity modulation

  • US 8,149,879 B2
  • Filed: 01/22/2008
  • Issued: 04/03/2012
  • Est. Priority Date: 09/26/2001
  • Status: Expired due to Term
First Claim
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1. A method of data transmission, said method comprising:

  • encoding, using an encoder, a plurality of data values into a symbol;

    transmitting a plurality of bursts using a transmitter, each burst occupying one of a plurality of frequency bands;

    wherein at least an order of transmission of the plurality of bursts in time and a polarity of at least one of the plurality of bursts defines the symbol, the symbol corresponding to the plurality of data values;

    wherein a bandwidth of at least one of the plurality of bursts is at least two percent of a center frequency of the burst;

    wherein said plurality of bursts includes a first burst occupying one of the plurality of frequency bands and a second burst occupying a different one of the plurality of frequency bands, andwherein at least one frequency point exists at which the amplitude of the first burst is within twenty decibels of a maximum amplitude of the first burst and at which the amplitude of the second burst is within twenty decibels of a maximum amplitude of the second burst.

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