Research on Optimal Design of Spaceborne SAR Real-time Imaging Technology Based on FPGA

With the continuous improvement of requirements in spaceborne SAR imaging technology, Spaceborne SAR real-time imaging processing system based on FPGA has become a method to realize the rapid real-time imaging of spaceborne SAR. The paper conducts a feasibility study on spaceborne SAR real-time imaging technology. Based on the current development and status of spaceborne SAR real-time imaging technology, a feasible research direction and technical route are proposed. In terms of hardware, the real-time imaging algorithm is implemented in an FPGA by reconstructing the FPGA hardware architecture. In terms of software algorithm, based on the traditional CS imaging algorithm, the algorithm is further optimized for different scenarios, which is more suitable for improved algorithms for hardware applications.

I. Introduction

Synthetic Aperture Radar (SAR) is an active microwave imaging radar that can perform two-dimensional high-resolution imaging of targets[1]. Compared with airborne SAR, spaceborne SAR has its unique advantages: The mapping area of Spaceborne SAR in unit time is much larger than that of airborne SAR[2]. Therefore, spaceborne SAR can be used in many fields such as forest monitoring, land census, disaster monitoring, and military reconnaissance.