Cai, J., Liu, W. orcid.org/0000-0003-2968-2888, Zong, R. et al. (1 more author) (2018) An improved expanding and shift scheme for the construction of fourth-order difference co-arrays. Signal Processing, 153. pp. 95-100. ISSN 0165-1684
Abstract
An improved expanding and shift (IEAS) scheme for efficient fourth-order difference co-array construction is proposed. Similar to the previously proposed expanding and shift (EAS) scheme, it consists of two sparse sub-arrays, but one of them is modified and shifted according to a new rule. Examples are provided with the second sub-array being a two-level nested array (IEAS-NA), as such a choice can generate more fourth-order difference lags (FODLs), although with the same number of consecutive lags. Furthermore, the array aperture of IEAS-NA is always greater than the corresponding EAS structure, which helps improving the DOA estimation result. Simulations results are provided to show the improved performance by the proposed new scheme.
Metadata
Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 Elsevier. This is an author produced version of a paper subsequently published in Signal Processing. Uploaded in accordance with the publisher's self-archiving policy. Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
Keywords: | Sparse arrays; Fourth-order difference co-array; Expanding and shift scheme; Cumulant |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 23 Aug 2018 11:04 |
Last Modified: | 06 Jul 2019 00:43 |
Published Version: | https://doi.org/10.1016/j.sigpro.2018.06.025 |
Status: | Published |
Publisher: | Elsevier |
Refereed: | Yes |
Identification Number: | https://doi.org/10.1016/j.sigpro.2018.06.025 |