Frequency domain E-pulse synthesis and target discrimination

Abstract

Abstruct-A frequency domain approach to the E-pulse radar target domain analyses will be used to develop a set of defining Ediscrimination scheme is introduced. This approach is shown to allow pulse quations. The frequency domain approach will be easier interpretation of E-pulse convolutions via the E-pulse spectrum, and leads to a simplified calculation of pulse basis function amplitudes in shown to be of significant value not only for providing a much the E-pulse Experimental &dene obtained dng aircraft more convenient way of viewing E-pulse discrimination, but models verifies the singlemode discrimination scheme, as well as the also for constntcting Certain E-pulse wavefoms. aspect-independent nature of the E-pulse technique. This leads to anLastly, experimental results using aircraft models will be integrated technique for target discrimination combining the E-pulse with presented, demonstrating single mode discrimination and sjngle mode extraction waveforms.verifying the aspect independence of the E-pulse technique.

Radar Target Discrimination and Identification Using Extinction-Pulses and Single-Mode Extraction Pulses

“…The E-pulse radar target discrimination scheme has been successfully demonstrated on numerous occasions using measurements taken on a ground plane range [44,49,63]. Recently, a time domain anechoic chamber has been imple- GHz) which has been resistively loaded to reduce inherent oscillations, and the field scattered from a radar target is received by an identical horn.…”

“…The first such synthesized signal was Kennaugh's K-pulse (281, defined as that waveform of minimal duration which would "kill" all the natural modes in the resulting target response. More recent discrimination waveforms [44,49] are the (extinction) E-pulse and (single-mode) S-pulse, which are detailed below. The E-pulse is synthesized to annihilate, when convolved with a band-limited late-time target pulse response, all natural modes present in that response.…”

“…While each choice has its own important motivation, perhaps the most versatile expansion is in terms of subsectional basis functions [49] revealing that the duration of a natural E-pulse is only dependent upon the imaginary part of one of the natural frequencies. The minimum natural E-pulse duration is just T -2N -- (4.11) max where w max is the largest radian frequency among the modes.…”

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

“…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.…”

“…Targets can be identified by their natural frequencies, which are extracted from the late time scattered responses when irradiated with transient electromagnetic signals. 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].…”