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Threshold-less collision detection and bit arbitration in a CFSK data system

  • US 4,409,593 A
  • Filed: 01/11/1982
  • Issued: 10/11/1983
  • Est. Priority Date: 01/11/1982
  • Status: Expired due to Fees
First Claim
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1. A method for collision detection in a chirped-frequency-shift-keyed (CFSK) data system having a common system communications medium and a plurality of data stations each containing a data transmitter and a data receiver, comprising the steps of:

  • identifying each of a successive plurality of synchronous bit time intervals during which at least one of the plurality of data stations transmitters may transmit a bit of digital data over the common system communications medium;

    constantly monitoring the common system communications medium with each data station receiver even while the transmitter of the same data station is transmitting digital data;

    subjecting the signal received by each data station receiver to a plurality of processing operations each in a respective one of a like plurality of channels; and

    comparing the energy contents of the outputs of the plurality of channels to detect if a data transmission colision has occurred.

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