ISAR Image Transform via Joint Intrapulse and Interpulse Periodic-Coded Phase Modulation

In this paper, an inverse synthetic aperture radar (ISAR) image transform method is proposed by utilizing the unique property of joint intra-pulse and inter-pulse periodic-coded phase modulation. By extending the periodic-coded phase modulation to the azimuth dimension, the multiple false targets spread along both the range and azimuth directions, then makes the target of interest (TOI) indistinguishable thus get effectively protected. On this basis, the image transform properties and parameter design principles are further discussed. Finally, both numerical and measured Yak-42 aircraft data simulations are conducted to demonstrate the validity of the proposed method.