Verfahren und System zur Sar-Bildgebung unter Verwendung eines auf Komplexwertiger Lokaler Interpolationsfunktion Basierenden Bereichsmigrationsalgorithmus

Details

Veröffentlichungs-Nr.

EP4776028

Anmeldetag

18. September 2025

Veröffentlichung

15. Juli 2026

Rechtsraum

EP

IPC

G01S13/90, G01S7/41

Abstract

The Range Migration Algorithm (RMA) is widely used for SAR image reconstruction from backscattered signals. Traditional RMA relies on the Fast Fourier Transform (FFT), which is unsuitable for irregular scanning trajectories. An interpolator based reconstruction method, referred as Local Interpolation Function-based Range Migration Algorithm (LIF-RMA), is provided for SAR imaging. The LIF-RMA efficiently addresses challenges associated with irregularly sampled trajectories. The LIF-RMA utilizes a complex-valued encoder-decoder network to transform irregularly sampled, complex-valued backscattered data into uniformly sampled complex raw data. The complex-valued encoder maps the distorted raw data into a feature space, while the complex-valued decoder interpolates and predicts the interpolated complex raw data at missing spatial coordinates. This data is then processed through a 2D FFT block before being fed to RMA for final SAR image reconstruction. In this process, as the LIF is applied prior to RMA, it aids in preserving phase integrity.

Anmelder

Firma

Tata Consultancy Services Limited

Land

🇮🇳 Indien

Fachgebiete