Smart AGC: a new anti-jam device for military satellite system

Author

Arnstein, Donald S.

Author_Institution

Comsat Syst. Div., Clarksburg, MD, USA

fYear

1991

fDate

4-7 Nov 1991

Firstpage

672

Abstract

An antijam device based on substitution of a more efficient automatic gain control (AGC) function into the front end of a transponder is described. Smart AGC discriminates between jammed and unjammed signals based solely on amplitude of the incoming signals. The key to operation of smart AGC is a broadband power measurement of the composite input signal which is then used to control a nonlinear amplifier/limiter characteristic, preventing the satellite high-power amplifier from saturating. The author describes the basics of smart AGC operation, and presents results obtained with a simulator developed by Comsat Systems Division. Implications for improved performance of future UHF and X-band satellites are discussed

Keywords

automatic gain control; interference suppression; jamming; microwave amplifiers; microwave limiters; microwave links; military equipment; power measurement; satellite relay systems; transponders; Comsat Systems Division; UHF; X-band; anti-jam device; automatic gain control; broadband power measurement; composite input signal; incoming signals; military satellite system; nonlinear amplifier/limiter characteristic; satellite communications; smart AGC; transponder; Bandwidth; Frequency; Gain control; Interference; Jamming; Military satellites; Power amplifiers; Signal to noise ratio; Spread spectrum communication; Transponders;

fLanguage

English

Publisher

ieee

Conference_Titel

Military Communications Conference, 1991. MILCOM '91, Conference Record, Military Communications in a Changing World., IEEE

Conference_Location

McLean, VA

Print_ISBN

0-87942-691-8

Type

conf

DOI

10.1109/MILCOM.1991.258341

Filename

258341