Title :
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
fDate :
11/1/1988 12:00:00 AM
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;
Journal_Title :
Antennas and Propagation, IEEE Transactions on