Title :
Impact of mainlobe interference angular extent on adaptive beamforming
Author :
Ballance, William P. ; Miller, Thomas W.
Author_Institution :
Hughes Aircraft Co., Fullerton, CA, USA
Abstract :
Adaptive beamformer performance against mainlobe interference is shown to significantly degrade when the interference has angular extent, even 0.005 beamwidths. Such angular extent can be caused by antenna rotation, antenna platform pitch or roll, or jammer motion. The degradation is shown to be sensitive to the interference power level. The impact on detection and angle of arrival estimation is addressed. Also, an interesting phenomenon that occurs in adaptive beamforming, when using shaded steering constraints, is presented
Keywords :
antenna phased arrays; antenna radiation patterns; interference (wave); parameter estimation; signal processing; adaptive beamforming; angle of arrival estimation; antenna platform pitch; antenna platform roll; antenna rotation; array processing; interference power level; jammer motion; mainlobe interference; mainlobe interference angular extent; shaded steering constraints; signal detection; Adaptive arrays; Aircraft; Array signal processing; Degradation; Interference; Jamming; Maximum likelihood estimation; Phased arrays; Signal to noise ratio; Working environment noise;
Conference_Titel :
Signals, Systems and Computers, 1991. 1991 Conference Record of the Twenty-Fifth Asilomar Conference on
Conference_Location :
Pacific Grove, CA
Print_ISBN :
0-8186-2470-1
DOI :
10.1109/ACSSC.1991.186595
