Parity framing of pulse systems

Details Parity framing of pulse systems Parity framing of pulse systems

1974-12-02

1976-06-15

Olms, Douglas W.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

3401461AG, H04J 306

Patent

active

039638693

ABSTRACT:
A carrier system is described in which a number of pulse encoded signals are multiplexed on a single transmission and demultiplexed and decoded at a remote terminal for distribution to a number of receivers at that location. A similar multiplex system uses a separate return pair of transmitting signals in the opposite direction. The multiplexed signals on each transmission line are framed by means of a framing pulse in each frame having a value which insures a preselected parity for each frame. To make sure that parity discrepancies will exist for other pulse positions even under all "1s" and all "0s" conditions, a second bit position is filled with a randomly-valued bit.

REFERENCES:
patent: 3456239 (1969-07-01), Glasson
patent: 3529089 (1968-08-01), Davis et al.
patent: 3587043 (1971-06-01), Mengani
patent: 3591720 (1971-07-01), Othmer
patent: 3707604 (1972-12-01), Greefkes et al.
patent: 3740478 (1973-06-01), Breant et al.
patent: 3766316 (1973-10-01), Hoffman et al.
patent: 3804982 (1974-04-01), Brown

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