MUMBAI, India, July 13 -- Intellectual Property India has published a patent application (202521002124 A) filed by Tata Consultancy Services Limited on January 09, 2025, for Method And System For Sar Imaging Using Complex-Valued Local Interpolation Function Based Range Migration Algorithm.
Inventors include Rokkam, Krishna Kanth; Gigie, Andrew; Kumar, Achanna Anil; Chakravarty, Tapas; and Pal, Arpan.
The application for the patent was published on July 10, 2026, under issue no. 28/2026.
Abstract: ABSTRACT METHOD AND SYSTEM FOR SAR IMAGING USING COMPLEX-VALUED LOCAL INTERPOLATION FUNCTION BASED RANGE MIGRATION ALGORITHM 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. [
Disclaimer: Curated by HT Syndication.
