Application of E-pulse Method for Remote Sensing Arbitrary Shaped Objects in Lossy Media

Abstract

Aspect independent radar target discrimination method, using the natural frequencies of arbitrary shaped objects, is introduced. The approach is based on the extinction-pulse (E-pulse) technique and, as the numerical simulation shows, it is relatively insensitive to random noise and to estimations of modal contents. This method allows to discriminate superwide-band radar targets down to the signal-to-noise ratio approximately 5 dB. The results of experimental research of the signals scattered by the arbitrarily shaped objects in lossy media are presented.

Identification of Air Targets by using Secondary Application of Terrestrial TV

“…We have simulated an influence of an aspect angle on an accuracy of the resonance model poles' estimation. According to the SEM an aspect angle variations could be executed by changing of system transfer function residues N m b(2 H(s) Z '', (2) j1 S-S1Sp where bj = lbjl earg(bi) is the residue ofj-th pole sj and mj is the scale factor. Fig.…”

“…Advanced radar target discrimination methods have utilized the ultra-wideband exciting signals for these purposes. For example, in active radar stations are used the pulses with effective duration about nanoseconds without carrier frequency [2]. Unfortunately this method has very restricted area of applications, such as ground penetration radars due to electromagnetic compatibility problems.…”

Ultra Wideband Radar Target Discrimination Using the Signatures Algorithm

“…In recent years, many radar target discrimination methods using the ultra wideband response of a target to a transient incident waveform have stimulated growing interest [1], [2]. The Baum's singularity expansion method (SEM) [3] provides the necessary mathematical formulation for describing the transient behavior of conducting targets.…”

Ultra wideband radar target discrimination using the signatures algorithm

“…To make the analysis of ultra wideband radar target discrimination algorithm we have selected resonance frequencies [2], appropriate to resonances of scaled models of aircrafts F-4 and MIG-27. Fig.…”

“…In recent years, many radar target discrimination methods using the ultra wideband response of a target to a transient incident waveform have stimulated growing interest [1], [2]. The Baum's singularity expansion method (SEM) [3] where s k = σ k + j2π f k is the k-th aspect-independent natural complex frequency of the target, and A k and ϕ k are the aspect-and excitation-dependent amplitude and phase of the k-th target mode, respectively, w [n] are samples of additive Gaussian band-limited noise.…”