An 8-Channels FPGA-based Reconfigurable Chirp Generator for Airborne/Spaceborne CP-SAR

摘要

This paper presents the work of an 8-channels Field Programmable Gate Array (FPGA) based chirp generator forrnairborne and spaceborne Circularly Polarized Synthetic Aperture Radar (CP-SAR). The paper first proposed a multi-channelrnDirect Digital Synthesis (DDS) based reconfigurable chirp generator architecture whereby the chirp signal properties for eachrnchannel can be independently reconfigurable in real-time. The discussion is then followed by the development work of the chirprngenerator hardware prototype. Finally, some sample chirp waveforms and its spectrum are shown. In the future, the chirprngenerator will be used in dual-band full polarimetric CP-SAR.