DOA estimation under unknown mutual coupling and multipath

Author

Bao, Qiming ; Ko, C.C. ; Zhi, Wanjun

Author_Institution

Dept. of Electr. & Comput. Eng., Singapore Nat. Univ., Singapore

Volume

41

Issue

2

fYear

2005

fDate

4/1/2005 12:00:00 AM

Firstpage

565

Lastpage

573

Abstract

We propose a new method for direction of arrival (DOA) estimation in the presence of multipath propagation and mutual coupling for a frequency hopping (FH) system. With the use of pilot symbols and assuming perfect time-frequency synchronization for a linear array, we take mutual coupling and multipath propagation into account, and derive a maximum likelihood (ML) estimator for both the mutual coupling matrix and DOA estimation. We then formulate an iterative alternating minimization (AM) algorithm for finding the mutual coupling and DOA parameters in an alternate manner. Simulation results illustrating the performance of the algorithm and comparison with the Cramer-Rao bound (CRB) are also presented.

Keywords

direction-of-arrival estimation; electromagnetic coupling; frequency hop communication; linear antenna arrays; maximum likelihood estimation; multipath channels; synchronisation; AM algorithm; CRB; Cramer-Rao bound; DOA estimation; DOA parameters; FH system; direction of arrival; frequency hopping; iterative alternating minimization; linear array; maximum likelihood estimator; multipath propagation; mutual coupling matrix; time-frequency synchronization; Direction of arrival estimation; Frequency estimation; Frequency synchronization; Iterative algorithms; Maximum likelihood estimation; Minimization methods; Multiple signal classification; Mutual coupling; Signal processing algorithms; Time frequency analysis;

fLanguage

English

Journal_Title

Aerospace and Electronic Systems, IEEE Transactions on

Publisher

ieee

ISSN

0018-9251

Type

jour

DOI

10.1109/TAES.2005.1468748

Filename

1468748