A low-complexity 2-D DOA estimation method for incoherently distributed sources

The two-dimensional (2-D) direction-of-arrival (DOA) estimation for incoherently distributed (ID) sources always has a high computational complexity because it depends on multidimensional search. To reduce the complexity, we propose a new method based on three closely parallel unity linear arrays (U...

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Vydáno v:2016 CIE International Conference on Radar (RADAR) s. 1 - 5
Hlavní autoři: Qingqing Lin, Ping Shuai, Liangwei Huang
Médium: Konferenční příspěvek
Jazyk:angličtina
Vydáno: IEEE 01.10.2016
Témata:
Computational complexity
Covariance matrices
direction-of-arrival (DOA)
Direction-of-arrival estimation
Estimation
Geometry
Incoherently distributed (ID) sources
propagator
Three-dimensional displays
Two dimensional displays
two-dimensional (2-D)
uniform linear array
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Shrnutí:The two-dimensional (2-D) direction-of-arrival (DOA) estimation for incoherently distributed (ID) sources always has a high computational complexity because it depends on multidimensional search. To reduce the complexity, we propose a new method based on three closely parallel unity linear arrays (ULAs). This method derives the approximation of three received ULA vectors under small angular extension from first-order Taylor approximation. The derived vector approximations are rotationally invariant, which enables one to estimate 2-D DOAs of ID sources via propagator. This procedure is more efficient because no multidimensional search or eigen-decomposition is needed. Simulation results testify to the performance of the proposed method.
DOI:10.1109/RADAR.2016.8059248