Wideband maximum likelihood direction finding and signal parameter estimation by using the tree-structured EM algorithm

Date
1999-01
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Source Title
IEEE Transactions on Signal Processing
Print ISSN
1053-587X
Electronic ISSN
1941-0476
Publisher
Institute of Electrical and Electronics Engineers
Volume
47
Issue
1
Pages
201 - 206
Language
English
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Abstract

The expectation maximization (EM) algorithm is presented for the case of estimating direction of arrivals of unknown deterministic wideband signals. Alternative regularized least squares estimation techniques for the required signal estimation and a tree structure for the data mapping in the EM algorithm are proposed. Extensive simulation results are presented for comparison of the proposed algorithms with the conventional EM approach and the current high-resolution methods of wideband direction finding.

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