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An Efficient 2D-DOA Estimation Technique for High-Altitude Platforms Mobile Communications

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Abstract

High-altitude platform (HAP) is promising for providing efficient wireless communications services. One of the critical issues in HAP communications is the difficulty to localize users through two-dimensional direction-of-arrival (2D-DOA) estimation due to the high computational complexity and the large covered area. Therefore, in this paper, an efficient technique is proposed to determine user location through 2D-DOA with a reduced processing time. The proposed technique estimates the 2D-DOA in two successive stages; the first will utilize a low-resolution 2D-DOA estimation technique such as Bartlett algorithm performed on a low-resolution distance, then applying a suitable threshold on the normalized Bartlett 2D-DOA spectrum to define ground windows over which the next high-resolution 2D-DOA stage will be performed such as MUSIC algorithm. Two scenarios are examined for the proposed technique to investigate the reduction in calculations time compared to the conventional 2D-DOA MUSIC algorithm without windowing. Simulation results show that at a resolution of 40 m, the required processing time is reduced to only 20 % of the conventional MUSIC algorithm and can be further reduced to 4 % at resolution of 100 meters at the same array size. In addition, the proposed technique is flexible and can be applied for any other efficient low-complexity 2D-DOA algorithms.

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Authors and Affiliations

  1. Department of Electronics and Electrical Communications Engineering, Faculty of Electronic Engineering, Menoufia University, Menoufia, Egypt

    Yasser Albagory

  2. College of Computers and Information Technology, Taif University, Taif, KSA

    Yasser Albagory

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  1. Yasser Albagory
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Correspondence to Yasser Albagory.

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Albagory, Y. An Efficient 2D-DOA Estimation Technique for High-Altitude Platforms Mobile Communications. Wireless Pers Commun 88, 429–448 (2016). https://doi.org/10.1007/s11277-015-3136-1

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  • DOI: https://doi.org/10.1007/s11277-015-3136-1

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