Reduced-dimension STAP method for conformal array based on sequential convex programming
Compared with the uniform arrays, the conformal array can effectively reduce the radar cross section and improve the utilization of the limited space in the aircraft. However, the special array structure aggravates the non-stationarity of the clutter, and the typical blocking matrix construction met...
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| Veröffentlicht in: | Signal processing Jg. 228; S. 109745 |
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| Format: | Journal Article |
| Sprache: | Englisch |
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Elsevier B.V
01.03.2025
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| ISSN: | 0165-1684 |
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| Abstract | Compared with the uniform arrays, the conformal array can effectively reduce the radar cross section and improve the utilization of the limited space in the aircraft. However, the special array structure aggravates the non-stationarity of the clutter, and the typical blocking matrix construction method in the space–time adaptive processing (STAP) is not appropriate any more. To address these issues, a reduced dimension STAP algorithm based on penalty sequential convex programming in the generalized sidelobe cancellation structure is proposed. The blocking matrix, channel selection vector and STAP weights can be optimized simultaneously in the algorithm framework. To tackle the resultant nonconvex problem, we formulate the original optimization function as a quasi-convex form and solve these parameters alternately within an iterative framework. Numerical simulations are provided to validate the proposed method and demonstrate its high performance.
•Reduced dimension space-time adaptive processing for the conformal arrays.•Processing framework based on the generalized sidelobe cancellation.•Joint optimization of blocking matrix, channel selection and filter weights.•Solving resultant nonconvex problem with sequential convex programming. |
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| AbstractList | Compared with the uniform arrays, the conformal array can effectively reduce the radar cross section and improve the utilization of the limited space in the aircraft. However, the special array structure aggravates the non-stationarity of the clutter, and the typical blocking matrix construction method in the space–time adaptive processing (STAP) is not appropriate any more. To address these issues, a reduced dimension STAP algorithm based on penalty sequential convex programming in the generalized sidelobe cancellation structure is proposed. The blocking matrix, channel selection vector and STAP weights can be optimized simultaneously in the algorithm framework. To tackle the resultant nonconvex problem, we formulate the original optimization function as a quasi-convex form and solve these parameters alternately within an iterative framework. Numerical simulations are provided to validate the proposed method and demonstrate its high performance.
•Reduced dimension space-time adaptive processing for the conformal arrays.•Processing framework based on the generalized sidelobe cancellation.•Joint optimization of blocking matrix, channel selection and filter weights.•Solving resultant nonconvex problem with sequential convex programming. |
| ArticleNumber | 109745 |
| Author | Yao, Xueqi Xie, Lei Cheng, Ziyang Shi, Jingxi Wang, Zhihang |
| Author_xml | – sequence: 1 givenname: Jingxi orcidid: 0000-0001-7018-3090 surname: Shi fullname: Shi, Jingxi email: sjx753951@hotmail.com organization: The School of Computer and Software Engineering, Xihua University, China – sequence: 2 givenname: Xueqi surname: Yao fullname: Yao, Xueqi organization: The College of Applied Mathematics, Chengdu University of Information Technology, China – sequence: 3 givenname: Zhihang orcidid: 0000-0002-5779-8215 surname: Wang fullname: Wang, Zhihang organization: The School of Information and Communication Engineering, University of Electronic Science and Technology of China, China – sequence: 4 givenname: Ziyang surname: Cheng fullname: Cheng, Ziyang organization: The School of Information and Communication Engineering, University of Electronic Science and Technology of China, China – sequence: 5 givenname: Lei orcidid: 0000-0002-4039-2411 surname: Xie fullname: Xie, Lei organization: The School of Cyber Science and Engineering, Southeast University, China |
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| Keywords | Convex optimization Reduced dimension Conformal array Space-time adaptive processing (STAP) |
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