Title :
Constrained adaptive beamforming with an uncalibrated array
Author :
Carhoun, Dean O.
Author_Institution :
Gemini Ind. Inc., Bedford, MA, USA
Abstract :
A method of constrained adaptive beamforming employing a self-focussing technique for an uncalibrated array is described and experimental results are presented. Constrained adaptive beamforming was employed to assess the performance of adaptive nulling to suppress non-Gaussian atmospheric noise and Doppler-spread ionospheric clutter received during bistatic radar experiments. A self-focussing method based on principal component analysis of the received data was devised and used to estimate the induced steering vectors of sources of interest. The procedure is described and results of subspace projection nulling of the unwanted noise and interference to enhance signal-to-noise ratio are presented
Keywords :
Doppler effect; adaptive antenna arrays; adaptive signal processing; array signal processing; atmospherics; interference suppression; ionospheric electromagnetic wave propagation; radar antennas; radar applications; radar clutter; radar signal processing; Doppler-spread ionospheric clutter; SNR; adaptive nulling; adaptive spatial processing; bistatic radar experiments; clutter suppression; constrained adaptive beamforming; experimental results; induced steering vector estimation; interference nulling; noise nulling; nonGaussian atmospheric noise suppression; principal component analysis; received data; self-focussing technique; signal-to-noise ratio; sources of interest; subspace projection nulling; Adaptive arrays; Array signal processing; Bistatic radar; Clutter; Frequency estimation; Interference constraints; Phased arrays; Principal component analysis; Receiving antennas; Signal to noise ratio;
Conference_Titel :
Statistical Signal and Array Processing, 1996. Proceedings., 8th IEEE Signal Processing Workshop on (Cat. No.96TB10004
Conference_Location :
Corfu
Print_ISBN :
0-8186-7576-4
DOI :
10.1109/SSAP.1996.534870
