Data communications with alternation of signaling constellations

Details Data communications with alternation of signaling constellations Data communications with alternation of signaling constellations

1989-04-10

1991-06-04

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

3701101, H04J 1500, H04L 2734

Patent

active

050220535

ABSTRACT:
Primary and secondary data are communicated from a transmitter to a receiver in a communication system. The value of an individual primary data word is communicated by transmitting an individual one of first plurality of channel symbols associated with that value while the value of a combined data word comprising an individual primary data word and an individual secondary data word is communicated by transmitting an individual one of second plurality of channel symbols associated with that value. In the receiver, both the primary and secondary data word values are recovered from the channel symbols thus transmitted. The approach of alternating two sets of channel symbols for transmission depending on the data word size can further apply to data communications at various fallback speeds.

REFERENCES:
patent: 4586182 (1986-04-01), Gallager
patent: 4644537 (1987-02-01), Gitlin et al.
patent: 4721928 (1988-01-01), Yoshida
patent: 4937844 (1990-06-01), Kao

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