High Dynamic Range Multi-channel modulo ADCs for Synthetic Aperture Radar

Abstract

The accuracy of Synthetic Aperture Radar (SAR) imaging is a critical performance metric that can be significantly impacted by the limited dynamic range of Analog-to-Digital Converters (ADCs) used in the sampling of SAR raw data. The saturation effect caused by the threshold of conventional ADCs can lead to clipped SAR raw data and reduced image quality. This paper proposes a novel solution using multi-channel modulo ADCs to improve SAR imaging performance. The proposed system is designed to recover signals with a higher dynamic range than conventional ADCs, even in noisy environments. Simulation results demonstrate that the proposed system provides improved noise immunity and increased signal dynamic range compared to conventional ADCs.