A Hybrid E-pulse Method for Discrimination of Conducting Scatterers in Resonance Region

Target scattered time domain response in the resonance region can be modelled by natural poles using the singularity expansion method (SEM). A hybrid of the conventional Extinction pulse (E-Pulse) and auto-regressive (AR) method is proposed in this communication for robust discrimination of radar targets. A new target discrimination number (TDN) is suggested, which gives enhanced discrimination margin for the decision process. The limitation of the conventional E-pulse method is highlighted using time domain responses of metallic cylinders of different radii obtained through simulations. The hybrid E-pulse technique is applied to scatterers in free space as well as under the surface and demonstrated to produce comfortable discrimination margins.