Title :
Direction-of-arrival estimation of correlated sources by adaptive beamforming
Author :
Serebryakov, George V.
Author_Institution :
Res. Inst. of Appl. Math. & Cybern., State Univ., Nizhny Novgorod, Russia
fDate :
11/1/1995 12:00:00 AM
Abstract :
This correspondence has analyzed the capability of minimum energy optimum/adaptive beamformer to estimate the bearings of two closely spaced narrowband equal-energy correlated sources. The analytical expression for minimum angular separation for resolution of such sources as a function of the correlation coefficient, signal power, and the parameters of the adaptive processor is derived. The approach of spatial smoothing is considered. The simple problem of definition of optimal size of the subarray for highly correlated sources is examined. Results of computer simulations are included to support our analysis
Keywords :
adaptive signal processing; correlation methods; covariance matrices; direction-of-arrival estimation; signal resolution; smoothing methods; DOA estimation; adaptive beamforming; array processing; bearing estimation; closely spaced sources; computer simulation; correlated sources; correlation coefficient; covariance matrix; direction-of-arrival estimation; minimum angular separation; minimum energy optimum/adaptive beamformer; narrowband equal-energy correlated sources; resolution analysis; sensor array; signal power; spatial smoothing; subarray; Array signal processing; Direction of arrival estimation; Frequency domain analysis; Interference suppression; Narrowband; Notice of Violation; Signal resolution; Spatial resolution; Spread spectrum communication; Wavelet transforms;
Journal_Title :
Signal Processing, IEEE Transactions on
