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Wireless communication system for adapting to frequency drift

  • US 5,909,640 A
  • Filed: 10/06/1997
  • Issued: 06/01/1999
  • Est. Priority Date: 01/20/1995
  • Status: Expired due to Term
First Claim
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1. A frequency tolerant transceiver for communicating individually with each of a plurality of remote receivers, comprising:

  • a receiver for tuning to an expected frequency associated with a particular one of said remote transceivers and receiving energy in a data signal having an actual frequency from said particular remote transceiver, said actual frequency allowed to drift from said expected frequency;

    a microcontroller coupled to the receiver for providing information for said expected frequency and determining said actual frequency from said expected frequency and frequency information derived from said energy in said data signal; and

    a transmitter coupled to the microcontroller for transmitting a return signal at said actual frequency to said particular remote transceiver.

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