Title :
Smart AGC: a new anti-jam device for military satellite system
Author :
Arnstein, Donald S.
Author_Institution :
Comsat Syst. Div., Clarksburg, MD, USA
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;
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
DOI :
10.1109/MILCOM.1991.258341
