DOA estimation via shift-invariant matrix completion
10.1016/j.sigpro.2021.107993
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/344839
Tipus de documentArticle
Data publicació2021-06
Condicions d'accésAccés obert
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Abstract
This paper presents a method to estimate the direction of arrival (DOA) of multiple sources received by a uniform linear array (ULA) with a reduced number of radio-frequency (RF) chains. The receiving array relies on antenna switching so that at every time instant only the signals received by a randomly selected subset of antennas are downconverted to baseband and sampled. Low-rank matrix completion (MC) techniques are then used to reconstruct the missing entries of the signal data matrix to keep the angular resolution of the original large-scale array. The proposed MC algorithm exploits not only the low- rank structure of the signal subspace, but also the shift-invariance property of ULAs, which results in a better estimation of the signal subspace. Further, the effect of MC on DOA estimation is discussed under the perturbation theory framework. The simulation results suggest that the proposed method provides accurate DOA estimates even in the small-sample regime with a significant reduction in the number of RF chains required for a given spatial resolution.
CitacióGarg, V. [et al.]. DOA estimation via shift-invariant matrix completion. "Signal processing", Juny 2021, vol. 183, p. 1-19.
ISSN0165-1684
Versió de l'editorhttps://www.sciencedirect.com/science/article/abs/pii/S0165168421000323
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