Method and apparatus for establishing a connection in shortwave

Details Method and apparatus for establishing a connection in shortwave Method and apparatus for establishing a connection in shortwave

1987-04-29

1989-08-01

Weldon, Ulysses

Communications: electrical

Continuously variable indicating

With meter reading

340825520, 340825580, 370100, 375111, 455 51, H04Q 100

Patent

active

048536865

ABSTRACT:
A connection (link setup) between individual stations of a radio network may be carried out fully automatically, and even with poor transmission quality, only the wanted stations are activated. A call signal includes a synchronization signal having narrow band, mark and space signals which form the component signals of a diverse pair of signals. A synchronization signal receiver independently detects and evaluates both of the component signals of the diverse pair as well as comparing the results thereof, with means of digital signal processing.

REFERENCES:
patent: 3955142 (1976-05-01), Frank et al.
patent: 4011511 (1977-03-01), Chang
patent: 4217661 (1980-08-01), Kahn
patent: 4555806 (1985-11-01), Lange et al.
patent: 4606040 (1986-08-01), David et al.
patent: 4616364 (1986-10-01), Lee
patent: 4628517 (1986-12-01), Schwarz et al.
"Assessing HF Propagation Conditions in Real Time", Defense Electronics Beach, May 1980.

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