Novel approach for ISAR image cross-range scaling

Martorella, Marco

doi:10.1109/taes.2008.4517004

Cited by 164 publications

(90 citation statements)

References 18 publications

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“…The vector i LOS represents the down-range dimension and the vector i Ω defines the cross range dimension [21]. The projected rotation axis perpendicular to the image plane Ω eff is given by…”

Section: Modelsmentioning

confidence: 99%

Joint inference of dominant scatterer locations and motion parameters of an extended target in high range‐resolution radar

Freitas

Villiers

Nel

2015

IET Radar, Sonar & Navigation

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A target of interest measured by a high range resolution radar may be modelled by multiple dominant points of reflections referred to as dominant scatterers. In this paper a non-linear state space setting is used to model the states and measurements of a target moving in the down-and cross-range dimensions. A resample-move particle filter with simulated annealing is successfully used to jointly infer the locations of the dominant scatterers and the motion parameters of the target. A novel technique for the initialization of the particle filter for the given application is presented. The location estimates of scatterers using the particle filter method are compared to those obtained using standard range-Doppler inverse synthetic aperture radar (ISAR) imaging when using the same radar returns for both cases. The particle filter infers the location of scatterers more accurately than range-Doppler ISAR processing, and the processing can be performed online as opposed to ISAR processing, which requires batching. It is relatively straightforward to extend the method to perform localisation and tracking of scatterers in three dimensions, whereas such an extension is challenging in range-Doppler ISAR processing. However, several challenges need be addressed to make this algorithm suitable for practical implementation and these challenges are discussed. This method may be used to obtain very accurate estimates of target state, which may in turn be used for accurate ISAR motion compensation. Given enough computing resources this algorithm may in future become the basis of a new radar target imaging scheme.

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Section: Modelsmentioning

confidence: 99%

Joint inference of dominant scatterer locations and motion parameters of an extended target in high range‐resolution radar

Freitas

Villiers

Nel

2015

IET Radar, Sonar & Navigation

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“…The second one (9) is the sinusoidal model which is typically assumed in most papers [10]. The third model, that we propose in (9),uses a correlated Gaussian signal whose correlation time coincides with the period of the sinusoidal movement. In this model a AWGN signal with unit variance and zero mean W i (ω) is filtered in the frequency domain with a low pass correlation filter H T i (ω).…”

Section: Dynamics Modelmentioning

confidence: 99%

“…Applications of ISAR for imaging of land moving targets [2][3][4], airborne targets [5,6] and space-borne targets [7] has been reported in the literature. However, ISAR imaging of maritime targets [8,9] has greater practical success than the previous examples. This is explained due to the constant oscillatory motions, both linear and angular, that waves and wind induce in the maritime target.…”

Section: Introductionmentioning

confidence: 98%

Interferometric Isar Imaging on Maritime Target Applications: Simulation of Realistic Targets and Dynamics

Felguera-Martin¹,

González-Partida²,

Burgos-García³

2012

PIER

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Abstract-ISAR imaging of maritime targets has greater success than other ISAR applications due to the constant oscillatory motions induced by waves and wind. However, relative target motions are usually unknown, difficult focusing, image interpretation and target classification. Using interferometry to obtain the height information makes possible to obtain a 3-D reconstruction of a target, aiding image focusing, image interpretation and target classification. However, the information and utility of the ISAR image and the interferometric information depends highly on geometry and targets dynamics. In this paper we will study the influence of movement dynamics in interferometric ISAR imaging using a realistic extended moving target simulation, a general geometry and complex dynamics models.

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“…이 과정을 수직 거리 스케일링(cross-range scaling: CRS)이라 정의한다. CRS는 표적의 산란정보를 미터 단위의 거리 및 수직 거 리 방향에서 나타냄으로써 automatic target recognition(ATR) 및 non-cooperative target recognition(NCTR)을 통한 표적의 피아 식별을 보다 더 효율적으로 수행할 수 있게 한다 [1]～ [4] . 그러나 표적의 기동정보를 알 수 없는 ISAR 영상 형성 에 대한 기하학적 특성은 RV의 추정을 통한 CRS의 수행 을 어렵게 한다.…”

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“…먼저, 특정 거리 빈(range bin)을 따라 형성된 처프 신호(chirp signal)의 처프율(chirp rate)을 계산 함으로써 RV를 추정하는 방법들이 있다 [1], [2] . 그러나 이들 은 낮은 signal to noise ratio(SNR) 환경과 잘못된 이산점 (outlier) 제거시 큰 추정 오차를 가지는 단점이 있다.…”

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ISAR Cross-Range Scaling for a Maneuvering Target

Kang

Bae²,

Kim³

et al. 2014

The Journal of Korean Institute of Electromagnetic Engineering

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In this paper, a novel approach estimating target's rotation velocity(RV) is proposed for inverse synthetic aperture radar(ISAR) cross-range scaling(CRS). Scale invariant feature transform(SIFT) is applied to two sequently generated ISAR images for extracting non-fluctuating scatterers. Considering the fact that the distance between target's rotation center(RC) and SIFT features is same, we can set a criterion for estimating RV. Then, the criterion is optimized through the proposed method based on particle swarm optimization(PSO) combined with exhaustive search method. Simulation results show that the proposed algorithm can precisely estimate RV of a scenario based maneuvering target without RC information. With the use of the estimated RV, ISAR image can be correctly re-scaled along the cross-range direction.Key

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Novel approach for ISAR image cross-range scaling

Cited by 164 publications

References 18 publications

Joint inference of dominant scatterer locations and motion parameters of an extended target in high range‐resolution radar

Joint inference of dominant scatterer locations and motion parameters of an extended target in high range‐resolution radar

Interferometric Isar Imaging on Maritime Target Applications: Simulation of Realistic Targets and Dynamics

ISAR Cross-Range Scaling for a Maneuvering Target

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