Suppression and IMD generation in a hard limiter transponder

Author

Nagurney, Ladimer S. ; Conroy, Martin J.

Author_Institution

Dept. of Electr. Eng., Hartford Univ., West Hartford, CT, USA

fYear

1993

fDate

18-20 May 1993

Firstpage

897

Lastpage

900

Abstract

Small terminal communications experiments that use the Advanced Communications Technology Satellite (ACTS), such as the Mini-Terminal Test Bed (MTTB) experiment, and that will send two narrowband signals through the hard-limited transponder are described. The suppression of a weaker signal in a hard limited transponder and the generation of intermodulation distortion (IMD) products are discussed. Simulations for CW signals of various signal levels were performed, and the maximum suppression was found to be 6 dB. IMD products generated include a pair of equal-amplitude signals symmetrically centered in frequency on the stronger signal and additional unequal-amplitude products that correspond to third and higher order products

Keywords

interference suppression; intermodulation distortion; satellite communication; transponders; Advanced Communications Technology Satellite; CW signals; IMD generation; Mini-Terminal Test Bed; equal-amplitude signals; hard-limited transponder; intermodulation distortion; unequal-amplitude products; weaker signal suppression; Artificial satellites; Communications technology; Frequency; Narrowband; Signal generators; Space vehicles; Switches; Testing; Transponders; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1993., 43rd IEEE

Conference_Location

Secaucus, NJ

ISSN

1090-3038

Print_ISBN

0-7803-1267-8

Type

conf

DOI

10.1109/VETEC.1993.510955

Filename

510955