Title :
DOA estimation in the presence of unknown mutual coupling and multipath propagation in a frequency hopping system
Author :
Bao, Qiming ; Ko, C.C. ; Zhi, Wanjun
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore
Abstract :
We propose a new method for DOA estimation in the presence of multipath propagation and mutual coupling (MC) for a frequency hopping (FH) system. We take MC and multipath propagation into account, and derive a maximum likelihood (ML) estimator for both MC matrix and DOA estimation. We then formulate an iterative alternating minimization (AM) algorithm for finding the MC 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; frequency hop communication; iterative methods; matrix algebra; maximum likelihood estimation; minimisation; DOA estimation; iterative alternating minimization algorithm; maximum likelihood estimator; multipath frequency hopping system; mutual coupling; Antenna arrays; Direction of arrival estimation; Frequency estimation; Iterative algorithms; Linear antenna arrays; Maximum likelihood estimation; Minimization methods; Mutual coupling; Narrowband; Signal processing algorithms;
Conference_Titel :
Communications, 2004 IEEE International Conference on
Print_ISBN :
0-7803-8533-0
DOI :
10.1109/ICC.2004.1312982
