Abstract
This paper proposes array configurations that can be used for sparse direction-of-arrival (DOA) estimation. The proposed array uses three uniform linear subarrays where the number of elements in the subarrays are taken to be pairwise coprime integers. The proposed array is referred to as a three-level prime array (3LPA). If the number of elements are pairwise coprime integers and primitive Pythagorean triple (PPT), a special case of the 3LPA is generated and we refer to as a Pythagorean array (PA). The elements of subarray 1 are spaced by the number of elements of subarray 2 or the number of elements of subarray 3. The same is done for subarray 2 and subarray 3 such that the subarrays share only their first antenna element. The main objective of the proposed arrays is to increase the degree-of-freedom (DOF) using a small aperture size. To handle this, the DOF is optimized and formulated as a function of the number of elements in the subarrays. For the same number of elements, the proposed array has smaller aperture and achieve more unique lags and consecutive lags and consequently large DOF compared with coprime array. Simulation results confirm the advantage of the proposed configurations compared to prototype coprime arrays.
Original language | English |
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Title of host publication | 2016 IEEE Asia-Pacific Conference on Applied Electromagnetics, APACE 2016 |
Editors | Muhammad Ramlee Kamarudin, Fauziahanim Che Seman, Mohd Khairul Mohd Salleh |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Pages | 277-281 |
Number of pages | 5 |
ISBN (Electronic) | 9781509010608 |
DOIs | |
State | Published - 2016 |
Publication series
Name | 2016 IEEE Asia-Pacific Conference on Applied Electromagnetics, APACE 2016 |
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Bibliographical note
Publisher Copyright:© 2016 IEEE.
Keywords
- Coprime array
- Degree of freedom
- Difference coarray
- Direction-of-arrival estimation
- Pythagorean array
- Three-level prime array
ASJC Scopus subject areas
- Computer Networks and Communications
- Instrumentation