Parametric detection of the helicopter hub echo

Kulpa, Krzysztof; Czekala, Z.; Misiurewicz, Jacek; Falkiewicz, J.

doi:10.1109/nrc.1999.767336

Cited by 9 publications

(3 citation statements)

References 4 publications

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“…There is a wide range of papers on a helicopter radar echo signal modeling and investigation of its properties in monostatic as well as bi-and multistatic radar systems [1][2][3][4][5][6] . There are several classification methods considered in the literature, exploiting specific characteristics of the echo signals of such objects [7][8][9][10][11][12] .…”

Section: Introductionmentioning

confidence: 99%

Classification of helicopter Doppler ambiguous echo signal

Lesnik

Serafin

Kawalec

2020

Radioelectronic Systems Conference 2019

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One of the tasks performed by contemporary radars is the classification of a type of detected objects. Among many types of objects, helicopters, and especially hovering ones, are of special interest in radar's self-defence. The echo signal of such object possesses specific properties of its spectrum that result from the construction of the object. A characteristic property of the echo signal is the presence of the spectral components from the hull of the helicopter as well as from the main rotor. The parameters of the latter components depend on the rotary speed of the rotor, the number of the blades and their length.Keywords: helicopter classification, helicopter detection, helicopter blade, helicopter echo signal number of rotates of the blade per second. The geometry of the considered rotor is presented in Fig. 1. *czeslaw.lesnik@wat.edu.pl; phone +48 261 83 7431; fax +48 261 83 7461

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Section: Introductionmentioning

confidence: 99%

Classification of helicopter Doppler ambiguous echo signal

Lesnik

Serafin

Kawalec

2020

Radioelectronic Systems Conference 2019

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“…Helicopters are interesting targets in the classification scope, due to their unique radar signature produced by the rotary motion of their blades (main and tail) [3]. This signature can easily be derived for low-resolution pulsed radars using a short-time approximation in which the blades are assumed to be stationary during the entire illumination interval.…”

Section: Introductionmentioning

confidence: 99%

Radar Signature of a Helicopter Illuminated by a Long LFM Signal

Burgos-García

Pérez-Martínez

Menoyo

2009

IEEE Trans. Aerosp. Electron. Syst.

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Helicopters exhibit a very particular Doppler radar signature caused by the movement of rotor blades. This signature can easily be derived using a short-time approximation: the blades are assumed to be static during each pulse. In wideband linear frequency modulated (LFM) radars, however, this assumption cannot be made. The work presented here describes the echo of rotary blades illuminated by LFM radars without the short-time assumption and provides useful information for detection and recognition purposes.

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“…El eco recibido de un helicóptero es una combinación de los retornos procedentes del fuselaje, de las aspas del rotor principal, de la mecánica de ensamblaje del rotor principal (main rotor hub) y de las aspas del rotor de cola [Bul91,Mis97]. En la literatura se ha indicado que el eco correspondiente al hub es interesante para tareas de detección [Mis98,Kul99]. Por otro lado, aunque es preciso admitir que los ecos correspondientes al rotor de cola o al fuselaje pueden ser útiles para la tarea de clasificación, es cierto que el eco correspondiente a las aspas del rotor principal constituyen la base de los actuales esquemas de clasificación [Rot97, Yoo00, Tik05, Le 96].…”

Section: Preliminaresunclassified

Enfocado de imágenes de radar de apertura sintética inversa. Nuevas técnicas y aplicaciones

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ISAR is a coherent radar technique which generates range-Doppler images of noncooperative targets. Such images may be useful for subsequent recognition/identification schemes. The ISAR technique complements the task of other image generator sensors, such as passive cameras or laser radar systems, which may have a reduced performance in adverse atmospheric conditions. 6.4. Estimación de la aceleración, radial y real, para los blancos V 1 a V 7 , usando las técnicas de seguimiento y de alineamiento de perfiles . . . 7.1. Parámetros de un radar LFMCW para la simulación de un aspa de un helicóptero .

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Parametric detection of the helicopter hub echo

Cited by 9 publications

References 4 publications

Classification of helicopter Doppler ambiguous echo signal

Classification of helicopter Doppler ambiguous echo signal

Radar Signature of a Helicopter Illuminated by a Long LFM Signal

Enfocado de imágenes de radar de apertura sintética inversa. Nuevas técnicas y aplicaciones

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