Estimating directions-of-arrival of coherent signals in unknown correlated noise via spatial smoothing

Author

Tan, Kah-Chye ; Oh, Geok-Lian

Author_Institution

Sch. of Electr. & Electron. Eng., Nanyang Technol. Inst., Singapore

Volume

45

Issue

4

fYear

1997

fDate

4/1/1997 12:00:00 AM

Firstpage

1087

Lastpage

1091

Abstract

We show that any weighted spatial smoothing (WSS) of subarray covariance matrices with nonzero weights will lead to a decorrelation of signals, and we discuss the consequences of using negative weights. We next propose a WSS that will eliminate correlated noise and establish a relationship between the WSS and covariance differencing. Finally, we present numerical results to demonstrate the effectiveness of the proposed WSS

Keywords

array signal processing; correlation methods; covariance matrices; direction-of-arrival estimation; interference suppression; noise; smoothing methods; coherent signals; correlated noise elimination; covariance differencing; directions of arrival estimation; negative weights; nonzero weights; signal decorrelation; subarray covariance matrices; unknown correlated noise; weighted spatial smoothing; Adaptive filters; Adaptive signal processing; Array signal processing; Computer simulation; Fading; Mobile communication; Notice of Violation; Signal processing algorithms; Speech processing; Switches;

fLanguage

English

Journal_Title

Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1053-587X

Type

jour

DOI

10.1109/78.564200

Filename

564200