An expanding and shift scheme for constructing fourth-order difference coarrays

Jingjing Cai; Wei Liu; Ru Zong; Qing Shen

doi:10.1109/LSP.2017.2664500

An expanding and shift scheme for constructing fourth-order difference coarrays

Jingjing Cai, Wei Liu^*, Ru Zong, Qing Shen

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

33 Citations (Scopus)

Abstract

An expanding and shift scheme for efficient fourth-order difference coarray construction is proposed. It consists of two sparse subarrays, where one of them is modified and shifted according to the analysis provided. The number of consecutive lags of the proposed structure at the fourth order is consistently larger than two previously proposed methods. Two effective construction examples are provided with the second sparse subarray chosen to be a two-level nested array, as such a choice can increase the number of consecutive lags further. Simulations are performed to show the improved performance by the proposed method in comparison with existing structures.

Original language	English
Article number	7842551
Pages (from-to)	480-484
Number of pages	5
Journal	IEEE Signal Processing Letters
Volume	24
Issue number	4
DOIs	https://doi.org/10.1109/LSP.2017.2664500
Publication status	Published - Apr 2017
Externally published	Yes

Keywords

Cumulant
fourth-order difference co-Array (FODCA)
second-order difference coarray (SODCA)
sparse arrays

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10.1109/LSP.2017.2664500

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abstract = "An expanding and shift scheme for efficient fourth-order difference coarray construction is proposed. It consists of two sparse subarrays, where one of them is modified and shifted according to the analysis provided. The number of consecutive lags of the proposed structure at the fourth order is consistently larger than two previously proposed methods. Two effective construction examples are provided with the second sparse subarray chosen to be a two-level nested array, as such a choice can increase the number of consecutive lags further. Simulations are performed to show the improved performance by the proposed method in comparison with existing structures.",

keywords = "Cumulant, fourth-order difference co-Array (FODCA), second-order difference coarray (SODCA), sparse arrays",

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AB - An expanding and shift scheme for efficient fourth-order difference coarray construction is proposed. It consists of two sparse subarrays, where one of them is modified and shifted according to the analysis provided. The number of consecutive lags of the proposed structure at the fourth order is consistently larger than two previously proposed methods. Two effective construction examples are provided with the second sparse subarray chosen to be a two-level nested array, as such a choice can increase the number of consecutive lags further. Simulations are performed to show the improved performance by the proposed method in comparison with existing structures.

KW - Cumulant

KW - fourth-order difference co-Array (FODCA)

KW - second-order difference coarray (SODCA)

KW - sparse arrays

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ER -

An expanding and shift scheme for constructing fourth-order difference coarrays

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Keywords

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