Title :
Improved angular resolution for spatial smoothing techniques
Author_Institution :
Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA
fDate :
12/1/1992 12:00:00 AM
Abstract :
Spatial smoothing techniques are used to estimate the directions of coherent arrivals. The performance of these techniques deteriorates rapidly as the coherent arrivals become closely spaced. The author examines the resolution performance of the existing forward-only and forward/backward spatial smoothing techniques. It is shown that the resolution for coherent signals can be improved by squaring array covariance matrices before forming smoothed array covariance matrices
Keywords :
array signal processing; DOA estimation; angular resolution; array covariance matrices; array processing; coherent arrivals; coherent signals; direction-of-arrival estimation; forward-only technique; forward/backward technique; spatial smoothing techniques; Apertures; Approximation methods; Covariance matrix; Degradation; Direction of arrival estimation; Narrowband; Sensor arrays; Signal resolution; Smoothing methods; Spatial resolution;
Journal_Title :
Signal Processing, IEEE Transactions on
