Study and Analysis of Jamming of Synthetic Aperture Radar

Abstract

Synthetic Aperture Radar (SAR) has been gaining huge popularity because surveying can be done at any time and under any weather conditions using SAR. The ability of SAR to process complex information leads to good resolution images, good contrast observance and precise measurements of the topographical attributes when captured using an airplane or some space station. It finds immense popularity in the fields of agriculture, determining oceanic currents, monitoring disasters like forest fires, volcanic eruptions and oil spills. Its main application is in the field of military for surveillance, tactical assessment, etc. To protect our own army, important targets or objects it becomes important to jam radar of the enemies. Jamming radar is gaining huge attention over the years. Jamming SAR is more difficult than the conventional radars because of its high processing gain. There are several methods available for jamming SAR, the two main methods are: active jamming, passive jamming. Active jamming involves adding up some false radiations in the true backscattered radiations. Passive jamming doesn’t involve changing the electromagnetic radiations; it mainly involves blocking the incident radiations. Fractional Fourier Transform is the generalized form of Fourier Transform. Any field where Fourier Transform is applicable can be replaced by Fractional Fourier Transform. In this dissertation, jamming signal is generated using Fourier Transform and by using Fractional Fourier Transform. The two signals simulated are compared and the results are observed.