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Rapid discrimination preambles and methods for using the same

  • US 20050195930A1
  • Filed: 12/29/2004
  • Published: 09/08/2005
  • Est. Priority Date: 01/21/2000
  • Status: Active Grant
First Claim
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1. A method for achieving rapid bit synchronization in low power RF communications systems, the method comprising the steps of:

  • attaching a preamble to a message to be delivered from a transmitting device to a receiving device, wherein the preamble is a unique bit pattern used to identify the transmitting device;

    receiving the message sent from the transmitting device;

    identifying a subsequence code;

    accessing a lookup table to determine a bit offset value associated with the subsequence code, wherein the lookup table contains all subsequence codes, and wherein each subsequence code is associated with a bit offset value and a next predicted bit value; and

    establishing bit synchronization by verifying that the next predicted bit value associated with the received subsequence code as determined by the associated bit offset value is actually received.

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