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System for the transmission of digital data in packets

  • US 4,414,662 A
  • Filed: 03/24/1981
  • Issued: 11/08/1983
  • Est. Priority Date: 04/03/1980
  • Status: Expired due to Fees
First Claim
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1. A system for the transmission of digital data in packets, comprising:

  • transmission means able to form packets comprising a preamble formed more particularly from a timing recovery bit sequence followed by a combination of bits called a single word;

    reception means more particularly comprising a decoder able to detect the presence of a single word in the signals received;

    wherein;

    (A) the transmission means is able to form single words taken in a group of words each having 2n bits and constituted by a word M of n bits between which are inserted the n bits of the complement word M, the bits of M being displaced relative to those of M by a number n of ranks, the choice of p defining the single word of the group;

    (B) in the reception means there is only one single word detector and it functions with n bits, said detector being able to detect the displaced appearances of p ranks of words M and M on each bit sequence of even rank and uneven rank.

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