Enhanced Direction of Arrival Estimation Using Non-Uniform Arrays | ||||
| The Egyptian International Journal of Engineering Sciences and Technology | ||||
| Articles in Press, Accepted Manuscript, Available Online from 28 May 2025 | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/eijest.2025.384598.1339 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Azhar Hamdi  1; Amr khaled Awaad2; Amgad A. Salama3; Abdelhamid A Ashraf4; adbelhameed shaalan5
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| 1Department of electronics and communication engineering, Faculty of engineering, Zagazig University,Zagazig, Sharkia | ||||
| 2Department of Electronics and Communications Engineering, Zagazig University, Zagazig 44519, Egypt. | ||||
| 3The Egyptian Technical Research and Development Centre, ADC, Cairo, Egypt | ||||
| 4Zagazig university, Department of Electronics and communication | ||||
| 5Electronics and Communications Engineering Dept., Zagazig University, Zagazig, Egypt | ||||
| Abstract | ||||
| This paper focuses on the application of non-uniform arrays (NUAs) to achieve high-level arrival direction estimation (DOAs) and to solve challenges such as target separation and a reduced snapshot. The proposed research includes a theoretical derivative analysis and MATLAB-based simulations, showing better resolution than conventional uniform linear arrays. One of the main concerns of this research is to minimize the number of elements of array antenna, thereby reducing the price and weight of the system while maintaining its performance. Unlike most existing methods, which require complex calculations based on dense arrays or calculations, this method provides a balance between the complexity and error rate of time and space. The results of this research show that NUAs provide good spatial resolution by distinguishing targets even in low S/N and snapshot counts. The results are evaluated by the root average square error and music spectra, as well as an eigenvalue analysis using bar graphs, and demonstrate the effectiveness of the proposed method. The study highlighted NUA's potential to improve DOA estimation capabilities and to provide the best solutions for radar and wireless communication applications at relatively low cost. | ||||
| Keywords | ||||
| non-uniform arrays; Direction of arrival estimation (DOAs); target separation; reduced snapshot; uniform linear arrays | ||||
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