Message generator for a controlled radio transmitter and receive

Details Message generator for a controlled radio transmitter and receive Message generator for a controlled radio transmitter and receive

1975-05-12

1977-05-31

Safourek, Benedict V.

Telegraphy

Systems

Printing

178 691, 343179, 325, H04B 100

Patent

active

040272435

ABSTRACT:
In a radio communication system having a command or base station and one or more controlled stations, the base station transmits outbound binary function messages to the controlled stations in order to make an inquiry or give a command to one or all of the controlled stations. The controlled station responds with an inbound binary message. The outbound messages comprise a sequence of binary bits at a first rate and having a first synchronizing word of nine bits, a first address word having eight message bits and four parity bits and produced three times, a second synchronizing word that is the binary inversion of the first synchronizing word, a second address word having eight message bits and four parity bits and produced three times, a third synchronizing word that is the binary inversion of the first synchronizing word, and a command word having eight message bits and four parity bits and produced three times. If a controlled station receives and recognizes its address, it transmits a response in the form of an inbound message having a sequence of binary bits at a rate that is 11/2 times the rate of the outbound message. The inbound message comprises a sequence of a plurality of binary preamble bits of different values, the first synchronizing word, the first address word produced three times, the second synchronizing word, the second address word produced three times, the third synchronizing word, and a response word having eight message bits and four parity bits and produced three times.

REFERENCES:
patent: 3418579 (1968-12-01), Hultberg
patent: 3532985 (1970-10-01), Glomb et al.
patent: 3646580 (1972-02-01), Fuller et al.
patent: 3725787 (1973-04-01), Featherston
patent: 3808367 (1974-04-01), Wigner et al.
Booklet Entitled "Ge-Marc 900 an Example of MUPDS," General Electric Company, Jan. 1974.

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