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Sensors 2012, 12(3), 3228-3242; doi:10.3390/s120303228

DOA Estimation for Local Scattered CDMA Signals by Particle Swarm Optimization

Department of Information Technology, Ling Tung University, Taichung 408, Taiwan
Received: 16 January 2012 / Revised: 18 February 2012 / Accepted: 28 February 2012 / Published: 7 March 2012
(This article belongs to the Section Physical Sensors)
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Abstract

This paper deals with the direction-of-arrival (DOA) estimation of local scattered code-division multiple access (CDMA) signals based on a particle swarm optimization (PSO) search. For conventional spectral searching estimators with local scattering, the searching complexity and estimating accuracy strictly depend on the number of search grids used during the search. In order to obtain high-resolution and accurate DOA estimation, a smaller grid size is needed. This is time consuming and it is unclear how to determine the required number of search grids. In this paper, a modified PSO is presented to reduce the required search grids for the conventional spectral searching estimator with the effects of local scattering. Finally, several computer simulations are provided for illustration and comparison. View Full-Text
Keywords: particle swarm optimization; direction-of-arrival estimation; CDMA; local scattering particle swarm optimization; direction-of-arrival estimation; CDMA; local scattering
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Chang, J.-C. DOA Estimation for Local Scattered CDMA Signals by Particle Swarm Optimization. Sensors 2012, 12, 3228-3242.

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