Alt-CC-PINN: An Alternating Optimization Framework with Implicit Neural Representation for Microwave Inverse Scattering Imaging
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arXiv
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866914600121794560 |
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| author | Sun, Shilong |
| author_facet | Sun, Shilong |
| contents | Microwave inverse scattering imaging (MISI) is a crucial computational technique in microwave nondestructive evaluation and near-field microwave sensing systems. However, quantitative reconstruction of high-contrast targets remains a formidable challenge due to severe multiple scattering effects and the inherent ill-posedness of electromagnetic inverse problems. To overcome this fundamental bottleneck in computational microwave imaging, this paper proposes an alternating optimization framework based on cross-correlated physics-informed neural network (Alt-CC-PINN). This architecture deeply decouples the evolution of the microwave physical field from the neural-network-based dielectric parameter inference, replacing traditional joint optimization with a hybrid alternating engine. Specifically, the method employs an analytical Polak-Ribière conjugate gradient (PR-CG) algorithm driven by a cross-correlated loss to optimally update the contrast sources, and deploys batched zero-padded 2D-FFT to ensure high computational efficiency. Subsequently, a deep learning optimizer is utilized to update the continuous neural representation. Extensive validations based on simulated and measured data demonstrate that Alt-CC-PINN effectively overcomes the local minima problem in high-contrast and low-signal-to-noise-ratio (SNR) environments. It exhibits superior reconstruction fidelity and robustness under the frequency-hopping probing strategy, providing a powerful and reliable computational electromagnetic solver for practical microwave imaging systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_26042 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Alt-CC-PINN: An Alternating Optimization Framework with Implicit Neural Representation for Microwave Inverse Scattering Imaging Sun, Shilong Signal Processing Microwave inverse scattering imaging (MISI) is a crucial computational technique in microwave nondestructive evaluation and near-field microwave sensing systems. However, quantitative reconstruction of high-contrast targets remains a formidable challenge due to severe multiple scattering effects and the inherent ill-posedness of electromagnetic inverse problems. To overcome this fundamental bottleneck in computational microwave imaging, this paper proposes an alternating optimization framework based on cross-correlated physics-informed neural network (Alt-CC-PINN). This architecture deeply decouples the evolution of the microwave physical field from the neural-network-based dielectric parameter inference, replacing traditional joint optimization with a hybrid alternating engine. Specifically, the method employs an analytical Polak-Ribière conjugate gradient (PR-CG) algorithm driven by a cross-correlated loss to optimally update the contrast sources, and deploys batched zero-padded 2D-FFT to ensure high computational efficiency. Subsequently, a deep learning optimizer is utilized to update the continuous neural representation. Extensive validations based on simulated and measured data demonstrate that Alt-CC-PINN effectively overcomes the local minima problem in high-contrast and low-signal-to-noise-ratio (SNR) environments. It exhibits superior reconstruction fidelity and robustness under the frequency-hopping probing strategy, providing a powerful and reliable computational electromagnetic solver for practical microwave imaging systems. |
| title | Alt-CC-PINN: An Alternating Optimization Framework with Implicit Neural Representation for Microwave Inverse Scattering Imaging |
| topic | Signal Processing |
| url | https://arxiv.org/abs/2605.26042 |