An experimental adaptive array to suppress weak interfering signals

Author

Ward, James ; Walton, Eric K. ; Gupta, Inder J. ; Ksienski, Aharon A.

Author_Institution

Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA

Volume

36

Issue

11

fYear

1988

fDate

11/1/1988 12:00:00 AM

Firstpage

1551

Lastpage

1559

Abstract

An experimental adaptive antenna system to suppress weak interfering signals is described. It is a sidelobe canceller with two auxiliary elements. Modified feedback loops are used to control the array weights. The received signals are simulated in hardware for parameter control. Digital processing is used for algorithm implementation and performance evaluation. The experimental results are presented. They show that interfering signals as much as 10 dB below the thermal noise level in the main channel are suppressed by 20-30 dB. Such a system has potential application in suppressing the interference encountered in direct broadcast satellite communication systems

Keywords

antenna phased arrays; direct broadcasting by satellite; feedback; interference suppression; telecommunications computer control; adaptive antenna system; algorithm implementation; array weights control; digital processing; direct broadcast satellite communication; experimental adaptive array; interference suppression; modified feedback loops; parameter control; performance evaluation; sidelobe canceller; weak interfering signals suppression; Adaptive arrays; Adaptive systems; Artificial satellites; Feedback loop; Interference suppression; Noise level; Noise reduction; Receiving antennas; Satellite broadcasting; Weight control;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.9704

Filename

9704