Performance of an automated radar target discrimination scheme using E pulses and S pulses

Abstract

Previous papers have demonstrated the viability of natural resonance based target discrimination using extinction pulses (E pulses) and single-mode pulses (S pulses). These papers qualitatively demonstrated the principles of resonance annihilation by forcing the interrogating pulse to have zeros at the complex natural resonance frequencies of the target. This paper presents a quantitative scheme for evaluating discrimination using the E pulse and the S pulse. Moreover, the performance of an automated E-pulse and S-pulse discrimination scheme is evaluated using numerically derived scattering data with varying amounts of noise.

Resonance Based Target Recognition Using Ultrawideband Polarimetric Signatures

“…The aspect and polarization independence nature allows these NRFs to be an excellent candidate for target classification. Automated target recognition (ATR) algorithms such as E-Pulse [3]- [6] were introduced and applied to targets in free space. Recent attempts have been focused on ATR algorithms based on partial/substructure resonances [7]- [9].…”

Discrimination of Free Space and Subsurface Canonical Metallic Targets Using Hybrid E-Pulse Method

“…An absorbing boundary condition with seven perfectly matched layers (PML) and cell size 4 mm is used for this simulation. In conventional method the discrimination is automated by E-pulse discrimination number (EDN) [3,4] given by the ratio of convolved energy in late time to energy of E-pulse.…”

“…The time domain response of a target is written as early-time and late-time response [3]. The late-time response r l (t) is expressed by a finite sum of damped sinusoids [1][2][3][4]:…”

“…One of the most popular methods used in recent time for resonance based target discrimination is the Extinction pulse (E-pulse) discrimination technique introduced by Rothwell et al [3]. The E-pulse discrimination number (EDN) was introduced to quantify the discrimination process for automated E-pulse technique [4]. The pulse basis function is conventionally used for construction of E-pulse, but recently other basis functions were also used and shown [12] that exponential basis function gives improved discrimination capacity.…”

“…The resonance based radar target discrimination schemes using time domain target response has generated considerable interest in the past [1][2][3][4][5]. Targets can be identified by their natural frequencies, which are extracted from the late time scattered responses when irradiated with transient electromagnetic signals.…”