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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2008-06-16
On Initialization of ML DOA Cost Function for UCA
By
Joon-Ho Lee,

    Professor Joon-Ho Lee

    Department of Information & Communication Engineering

    Sejong University

    Korea

    Homepage

Sang-Ho Jo

    Dr. Sang-Ho Jo

    Hyundai J-Comm. Co. Ltd.

    Korea

    Homepage

Progress In Electromagnetics Research M, Vol. 3, 91-102, 2008
doi:10.2528/PIERM08052702 | Google Scholar

Abstract
Maximum likelihood (ML) direction-of-arrival (DOA) estimation is essentially an optimization of multivariable nonlinear cost function. Since the final estimate is highly dependent on the initial estimate, an initialization is critical in nonlinear optimization. Alternating Projection (AP) initialization has been proposed as computationally efficient method for the initialization of the ML DOA cost function. In this paper, we propose a multi-dimensional (M-D) search scheme of uniform exhaustive search and improved exhaustive search. Improved exhaustive search is used to reduce the computational load of uniform exhaustive search. In the improved exhaustive search algorithm, the two-step procedure is applied to reduce the computational load of the uniform exhaustive search initialization scheme. In numerical results, it is shown that the performance of the proposed scheme is better than that of AP initialization.
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Citation
Joon-Ho Lee, and Sang-Ho Jo, "On Initialization of ML DOA Cost Function for UCA," Progress In Electromagnetics Research M, Vol. 3, 91-102, 2008.
doi:10.2528/PIERM08052702
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