Transmit Waveform Design Based on Ambiguity Function Shaping for Distributed Coherent Aperture Radar in MIMO Mode

被引：0
|
作者：
He, Mengmeng [1 ]
Jia, Yizhen [1 ]
Sabrina Greco, Maria [2 ]
Gini, Fulvio [2 ]
Wang, Wen-Qin [1 ]
机构：
[1] University of Electronic Science and Technology of China, School of Information and Communication Engineering, Chengdu,611731, China
[2] University of Pisa, Department of Information Engineering, Pisa,56122, Italy
来源：
IEEE Geoscience and Remote Sensing Letters | 2024年 / 21卷
关键词：
Orthogonal functions;
D O I：
10.1109/LGRS.2024.3467133
中图分类号：
学科分类号：
摘要：
To achieve full coherence, it is indispensable for distributed coherent aperture radar (DCAR) to estimate coherence parameters (CPs) using orthogonal waveforms in MIMO mode. However, incomplete orthogonality between waveforms and initial time and phase synchronization errors between the subapertures introduce estimation errors, which degrade full coherence performance. To tackle these issues, we propose an orthogonal waveform design framework based on ambiguity function (AF) shaping to improve CPs' estimation accuracy. We combine the alternating direction method of multipliers (ADMM) and the majorization-minimization (MM) algorithm to transform the nonconvex quartic optimization problem into a quadratic optimization problem. Numerical simulation results show that the optimized waveforms significantly enhance the estimation accuracy of CPs. © 2024 IEEE.
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