Sparsity‐optimised farrow structure variable fractional delay filter for wideband array
Abstract In this paper, a new sparsity‐optimised Farrow structure variable fractional delay (SFS‐VFD) filter is proposed to address the aperture effect in wideband array. Our method is based on coefficient (anti‐)symmetry and optimises the number and orders of its sub‐filters, greatly reducing the n...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Hindawi-IET
2023-06-01
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| Series: | IET Signal Processing |
| Subjects: | |
| Online Access: | https://doi.org/10.1049/sil2.12228 |
| _version_ | 1797418866813435904 |
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| author | Wenjing Zhou Mingwei Shen Min Xu Guodong Han Yudong Zhang |
| author_facet | Wenjing Zhou Mingwei Shen Min Xu Guodong Han Yudong Zhang |
| author_sort | Wenjing Zhou |
| collection | DOAJ |
| description | Abstract In this paper, a new sparsity‐optimised Farrow structure variable fractional delay (SFS‐VFD) filter is proposed to address the aperture effect in wideband array. Our method is based on coefficient (anti‐)symmetry and optimises the number and orders of its sub‐filters, greatly reducing the non‐zero coefficients. The established cost function is formulated as a parametric minimisation problem with multiple regularisation constraints, and solved by the modified three‐block alternating direction multiplier method (MTB‐ADMM), which is improved by introducing core variable correction items to ensure stable and fast convergence. Experimental results show that the SFS‐VFD filter reduces the complexity of the system by decreasing the use of multipliers and adders while ensuring high delay accuracy. In wideband array, the SFS‐VFD filter effectively corrects the aperture effect and achieves precise beam pointing. |
| first_indexed | 2024-03-09T06:40:09Z |
| format | Article |
| id | doaj.art-53f8596854fd46cea7775c5eea8eb0f1 |
| institution | Directory Open Access Journal |
| issn | 1751-9675 1751-9683 |
| language | English |
| last_indexed | 2024-03-09T06:40:09Z |
| publishDate | 2023-06-01 |
| publisher | Hindawi-IET |
| record_format | Article |
| series | IET Signal Processing |
| spelling | doaj.art-53f8596854fd46cea7775c5eea8eb0f12023-12-03T10:52:22ZengHindawi-IETIET Signal Processing1751-96751751-96832023-06-01176n/an/a10.1049/sil2.12228Sparsity‐optimised farrow structure variable fractional delay filter for wideband arrayWenjing Zhou0Mingwei Shen1Min Xu2Guodong Han3Yudong Zhang4College of Computer and Information Engineering Hohai University Nanjing ChinaCollege of Computer and Information Engineering Hohai University Nanjing ChinaScience and Technology on Electronic Information Control Laboratory Chengdu ChinaThe 54th Research Institute of CETC Shijiazhuang ChinaSchool of Computing and Mathematical Sciences University of Leicester Leicester UKAbstract In this paper, a new sparsity‐optimised Farrow structure variable fractional delay (SFS‐VFD) filter is proposed to address the aperture effect in wideband array. Our method is based on coefficient (anti‐)symmetry and optimises the number and orders of its sub‐filters, greatly reducing the non‐zero coefficients. The established cost function is formulated as a parametric minimisation problem with multiple regularisation constraints, and solved by the modified three‐block alternating direction multiplier method (MTB‐ADMM), which is improved by introducing core variable correction items to ensure stable and fast convergence. Experimental results show that the SFS‐VFD filter reduces the complexity of the system by decreasing the use of multipliers and adders while ensuring high delay accuracy. In wideband array, the SFS‐VFD filter effectively corrects the aperture effect and achieves precise beam pointing.https://doi.org/10.1049/sil2.12228array signal processingdigital filters |
| spellingShingle | Wenjing Zhou Mingwei Shen Min Xu Guodong Han Yudong Zhang Sparsity‐optimised farrow structure variable fractional delay filter for wideband array IET Signal Processing array signal processing digital filters |
| title | Sparsity‐optimised farrow structure variable fractional delay filter for wideband array |
| title_full | Sparsity‐optimised farrow structure variable fractional delay filter for wideband array |
| title_fullStr | Sparsity‐optimised farrow structure variable fractional delay filter for wideband array |
| title_full_unstemmed | Sparsity‐optimised farrow structure variable fractional delay filter for wideband array |
| title_short | Sparsity‐optimised farrow structure variable fractional delay filter for wideband array |
| title_sort | sparsity optimised farrow structure variable fractional delay filter for wideband array |
| topic | array signal processing digital filters |
| url | https://doi.org/10.1049/sil2.12228 |
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