Anti-intrusion defeator and locator for communication satellites

Details Anti-intrusion defeator and locator for communication satellites Anti-intrusion defeator and locator for communication satellites

1989-08-23

1992-08-18

Eisenzopf, Reinhard J.

Telecommunications

Carrier wave repeater or relay system

Portable or mobile repeater

342352, 455295, 455296, H04B 110, H04B 7185

Patent

active

051406942

ABSTRACT:
The present invention relates to an economical yet effective technique for locating and defeating intentional or unintentional interfering signals transmitted to a commercial communications satellite on a channel-by-channel basis. The satellite arrangement includes a first and a second configuration of hybrids and Variable Power Combiners (VPCs), respectively, that concurrently combine the channels received from a plurality of ground regions for delivery to at least one input multiplexer. In one arrangement, the corresponding channel outputs from the at least one input multiplexer, are each connected to a different input of a separate Single Pole Double Throw (SPDT) switch. Channel switching is accomplished by transmitting commands to the VPCs and SPDT switches from a command earth station. Noting the presence or absence of the interfering signal for a given channel switch and VPC setting will provide the location of the interferer and the elimination of the interfering signal.

REFERENCES:
patent: 4090199 (1978-05-01), Archer
patent: 4144495 (1979-03-01), Metzger
patent: 4561067 (1985-12-01), McKeown
patent: 4612546 (1986-09-01), Rosen
patent: 4651157 (1987-03-01), Gray et al.
patent: 4667203 (1987-05-01), Counselman
patent: 4717919 (1988-01-01), Cherrette et al.
Hoernig et al., Milcom '84, Los Angeles, Calif., Oct. 1984, vol. 2, pp. 197-200.
DeCristofaro et al., ICC '86, Toronto, Canada, Jun., 1986, vol. 2, pp. 1088-1092.
Sheets et al., Radio Electronics, vol. 57, No. 10, Oct. 1986, pp. 47-49, 80.

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