Analysis of spatial smoothing with uniform circular arrays

Author

Maheswara Reddy, K. ; Reddy, K. Maheswara

Author_Institution

CASSA, Defence Res. & Dev. Organ., Bangalore, India

Volume

47

Issue

6

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

1726

Lastpage

1730

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;

fLanguage

English

Journal_Title

Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1053-587X

Type

jour

DOI

10.1109/78.765150

Filename

765150