Abstract
Imaging of a target with high resolution is an important task in many Radar applications. In order to obtain high resolution images, Inverse synthetic aperture Radar (ISAR) imaging is implemented. Down range resolution can be obtained by transmitting signals having large bandwidth while cross range resolution is obtained by collecting echo signals obtained from different positions of the target during its rotation. The conventional method in ISAR imaging is Range Doppler (RD) method. In RD method, to obtain the final image either Fourier transform or FFT is used in general. Here in this paper, a new transform named Gabor transform is used which shows clearly the enhancement in the image resolution when compared with the former case. Also a comparison between the images for two different input signals namely Step frequency and LFM waveforms will be shown. The paper is structured as below. In Sect. 1 Introduction is explained. In Sect. 2 Step frequency and LFM waveforms are discussed and Sect. 3 gives the Simulation results. Finally in Sect. 4 Conclusion is given.
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