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System and method for high speed data transmission

  • US 6,301,308 B1
  • Filed: 06/23/1998
  • Issued: 10/09/2001
  • Est. Priority Date: 06/23/1998
  • Status: Expired due to Fees
First Claim
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1. In a system where data is sent from a sending system to a receiving system over a band limited channel using a transmission waveform comprising a plurality of individual narrowband waveforms, each comprised of a plurality of substantially phase continuous events with a width based on the data word encoded thereby, a method for high speed data transfer between the sending system and the receiving system, comprising the steps of:

  • generating a plurality of substantially phase continuous narrowband waveforms, each comprising a plurality of substantially phase continuous events with a width that is dependent on a data word to be transferred by that event and that lies between a minimum and maximum value selected for each of the plurality of narrowband waveforms so that each of said narrowband waveforms occupies a relatively small portion of the bandwidth of the band limited channel;

    generating at least one substantially phase continuous pilot tone;

    defining an epoch time;

    combining said plurality of narrowband waveforms and said at least one pilot tone into a transmit waveform having the epoch time;

    transmitting said transmit waveform to the receiving system, wherein a single frame of data is transferred during said epoch time after which a new epoch is begun that transfers an additional frame of data; and

    while transmitting said transmit waveform, inserting a makeup time for any of said plurality of narrowband waveforms which fall short of said epoch time after all data words for the current frame of data have been transferred.

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