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Data encoding and decoding communication system for three frequency FSK modulation and method therefor

  • US 4,425,666 A
  • Filed: 01/29/1982
  • Issued: 01/10/1984
  • Est. Priority Date: 01/29/1982
  • Status: Expired due to Term
First Claim
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1. A system for the communication of a sequence of bits of data in the form of Q-ary symbol signals along a plurality of channels comprising:

  • a transmitter having means for serially encoding into the Q-ary symbol signal and transmitting the Q-ary symbol signals along the plurality of channels such that at least one of the plurality of channels is devoted to transmitting a Q-ary symbol in place of every second Q-ary symbol from the beginning of a string of repeated Q-ary symbols such that no two Q-ary symbols in succession are transmitted along the same channel; and

    a receiver being responsive to said transmitter, having means for serially receiving and decoding said Q-ary symbol signals to reconstruct the sequence of bits of data, and being triggered by transmitting a Q-ary symbol signal along said at least one channel devoted to transmitting every second Q-ary symbol from the beginning of a string of repeated Q-ary symbols to repeat output of a preceding Q-ary symbol.

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