Time Frequency Analysis Using High Resolution Radar for Better Imaging of Maneuvering Targets

Abstract: It is vital to image any given target with highest resolution so as to visualize the hotspots onboard and subsequently minimize the same to avoid any threat from the enemy, to visualize the given target better for suitable actions be it for agriculture, navigation, detection of different materials under the soil, etc. Imaging radar, like High Resolution Radar (HRR), offers a combatant the capability to perform long range surveillance with high quality imagery for positive target identification. To improve the time resolution, Time-Frequency Transform (TFT) methods of High Resolution Radar (HRR) imaging have been studied. Unlike traditional Fourier based processing time- frequency transform (TFT) allows variable time resolution of the entire event that falls within the HRR coherent integration period to be extracted as part of the imaging process. In this present work HRR imaging using time frequency transform to produce scattering or reflectivity centre’s of maneuvering targets for different values of angular velocity and observation time, and it is observed that the cross range resolution has been improved.

Keywords: High Resolution Radar, Cross Range Resolution, Translational Motion, Rotational Motion.