Bit synchronization method for a digital radio telephone system

  • US 4,803,726 A
  • Filed: 12/31/1986
  • Issued: 02/07/1989
  • Est. Priority Date: 12/31/1986
  • Status: Expired due to Term
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First Claim
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1. A method of providing continuous bit synchronization of an input data stream to an output data stream over a first data transmission path having digital signalling capabilities, said bit synchronization method comprising the steps of:

  • (a) accepting an input data stream at a first bit rate, and accepting at least one predetermined signalling word;

    (b) interleaving said signalling word with a predetermined number of data bits of said input data stream to provide a combined data message having a second bit rate;

    (c) transmitting said combined data message via said first data transmission path;

    (d) receiving said transmitted data message;

    (e) recovering a clock signal from said received data message;

    (f) separating said signalling word from said received data message to provide separated data words having an instantaneous bit rate corresponding to said recovered clock signal;

    (g) modifying the number of data bits of said separated data words to approximate said predetermined number of data bits, thereby providing modified data words; and

    (h) modifying the clock rate of said modified data words to correspond to said first bit rate, thereby providing an output data stream which is in bit synchronization with said input data stream.

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