Coded communication system with shared symbols

Details Coded communication system with shared symbols Coded communication system with shared symbols

1988-12-09

1991-01-08

Safourek, Bendict V.

Telecommunications

Transmitter and receiver at separate stations

455 54, 455343, H04B 726, H04B 116

Patent

active

049842919

ABSTRACT:
A data communication system, including at least one base station and at least one portable module 120, wherein the portable module 120 transmits data on a high frequency, and the base station transmits data on a much lower frequency. Transmissions by the base station use a pulse-width modulation scheme where the most commonly used signals correspond to the shortest pulse. A "read" command is encoded as the same pulse width as one of the two write commands. Since the direction of data transmission is known in overhead, there will be no ambiguity.

REFERENCES:
patent: 4247908 (1981-01-01), Lockhart, Jr. et al.
patent: 4433387 (1984-02-01), Dyer et al.

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