Method for jam-resistant communication transmission

Details Method for jam-resistant communication transmission Method for jam-resistant communication transmission

1981-06-08

1989-06-27

Cangialosi, Salvatore

Pulse or digital communications

Repeaters

Testing

380 34, H04B 110

Patent

active

048436127

ABSTRACT:
A method for jam-resistant transmission speech signals by radio which have been processed via vocoders, utilizing spread spectrum multiple access modulation (SSMA) or rapid frequency hopping (FH) provides, with respect to the danger of an inherent jamming brought about when a great number of stations simultaneously use the same frequency band for the same radio channel frequency group, activation and deactivation of the transmitter and receiver at the rate of the internal system frame clock pulse during a frame clock pulse period only when useful information is present. In this manner, in the case of simplexcommunication connections, on the average approximately 40% and, in the case of duplex operation, more than 60%, of the transmitting time can be saved, and hence, the inherent jamming of the system can be reduced in a corresponding fashion.

REFERENCES:
patent: 3696306 (1972-10-01), Kline, Jr.
patent: 3878525 (1975-04-01), Alpers
patent: 3890467 (1975-06-01), Sciulli
patent: 4004101 (1977-01-01), Vaillant
patent: 4037159 (1977-07-01), Martin
patent: 4057690 (1977-11-01), Vagliani et al.
patent: 4134071 (1979-01-01), Ohnsorge
patent: 4142066 (1979-02-01), Ahamed
patent: 4185241 (1980-01-01), Ewanus et al.
Flanagan J. L., "Speech Analysis Synthesis and Perception", Springer-Verlag, 2 (1972) pp. 323-329.

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