Title :
Analysis of spatial smoothing with uniform circular arrays
Author :
Maheswara Reddy, K. ; Reddy, K. Maheswara
Author_Institution :
CASSA, Defence Res. & Dev. Organ., Bangalore, India
fDate :
6/1/1999 12:00:00 AM
Abstract :
We analyze spatial smoothing with uniform circular arrays (UCAs). In particular, we study the performance of the Root-MUSIC with smoothing in the presence of correlated sources, finite data perturbations, and errors in the transformed steering vector that arise due to some approximations made while extending the Root-MUSIC and smoothing to UCA. Expressions are derived for the asymptotic performance of the Root-MUSIC with smoothing applied to the transformed UCA data. An attempt has been made to bring out the impact of both the forward and forward-backward smoothing. We consider UCAs with isotropic as well as directional sensors in our study. Computer simulations are provided to demonstrate the usefulness of the analysis
Keywords :
array signal processing; correlation methods; direction-of-arrival estimation; signal classification; smoothing methods; DOA estimation; Root-MUSIC; approximations; asymptotic performance; computer simulations; correlated sources; directional sensors; finite data perturbations; forward smoothing; forward-backward smoothing; isotropic sensors; spatial smoothing; transformed steering vector errors; uniform circular arrays; Azimuth; Cause effect analysis; Computer simulation; Direction of arrival estimation; H infinity control; Multiple signal classification; Phased arrays; Research and development; Smoothing methods; Spatial resolution;
Journal_Title :
Signal Processing, IEEE Transactions on
