Abstract
Maximum Likelihood (ML) method has an excellent performance for Direction-Of-Arrival (DOA) estimation, but a mul-tidimensional nonlinear solution search is required which complicates the computation and prevents the method from practical use. To reduce the high computational burden of ML method and make it more suitable to engineering applications, we apply the Artificial Bee Colony (ABC) algorithm to maximize the likelihood function for DOA estimation. As a recently proposed bio-inspired computing algorithm, ABC algorithm is originally used to optimize multivariable functions by imitating the behavior of bee colony finding excellent nectar sources in the nature environment. It offers an excellent alternative to the conventional methods in ML-DOA estimation. The performance of ABC-based ML and other popular meta-heuristic-based ML methods for DOA estimation are compared for various scenarios of convergence, Signalto-Noise Ratio (SNR), and number of iterations. The computation loads of ABC-based ML and the conventional ML methods for DOA estimation are also investigated. Simulation results demonstrate that the proposed ABC based method is more efficient in computation and statistical performance than other ML-based DOA estimation methods.
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Zhang, Z., Lin, J. & Shi, Y. Application of artificial bee colony algorithm to maximum likelihood DOA estimation. J Bionic Eng 10, 100–109 (2013). https://doi.org/10.1016/S1672-6529(13)60204-8
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DOI: https://doi.org/10.1016/S1672-6529(13)60204-8