Microwave photonic based high-resolution ISAR imaging system for high-speed target

Abstract

Some flying objects have high velocity between 10 to 20 Mach, causing extra Doppler dispersion in wideband LFM signal which will deteriorate the ISAR imaging resolution and quality. Also, the detection and imaging of such high-speed objects demands highly on the real-time performance of imaging compensation algorithm. This paper presents a microwave photonic based radar and its compensation algorithm by using digital signal processing. Experiments obtain a clear and high-resolution ISAR image of the high-speed target with velocity of 15Mach. The image has the resolution of 3.12cm*19.12cm, and it just needs 0.30 seconds to do the ISAR imaging.