An Efficient Isar Imaging Method for Multiple Targets

Jung, Jin‐Myung; Kim, Kyung‐Tae; Kim, Si-Ho; Park, Sang-Hong

doi:10.2528/pier14042905

Cited by 6 publications

(9 citation statements)

References 14 publications

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“…We use the procedure introduced in [4,10] to derive the principle of MD of BM because the procedure is very easy to understand and clearly explains MD of BM. The monostatic chirp radar signal used for the measurement system at fast time t is devised system by clearly representing the MD signature of each target.…”

Section: Micro-doppler Principle Of Bmmentioning

confidence: 99%

See 1 more Smart Citation

Efficient Measurement System to Investigate Micro-Doppler Signature of Ballistic Missile

Choi¹,

Kim²,

Jung³

et al. 2016

International Journal of Aeronautical and Space Sciences

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Micro-Doppler (MD) shift caused by the micro-motion of a ballistic missile (BM) can be very useful to identify it. In this paper, the MD signatures of three scale-model BMs are investigated using a portable measurement system. The measurement system consists of an X-band 2-by-2 phase comparison mono-pulse radar, and a mechanical device that can impart controlled spinning and coning motions simultaneously to a model to yield the MD signature that replicates the characteristic of each target and the corresponding micro-motion. The coning motion determined the overall period of MD, and the spinning motion increased its amplitude. MD was also dependent on aspect angle. The designed system is portable, and can implement many micro-motions; it will contribute to analysis of MD in various situations.

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Section: Micro-doppler Principle Of Bmmentioning

confidence: 99%

“…t s is the slow time which is a multiple of T s , K is the number of the scatterers that comprise the k is the amplitude of scatterer k, and  k (t s ) is the two-way fast-time delay at t s between the radar Assuming that k located at (x k , y k ) is observed at (t s ) in the x-y plane,  k (t s ) is given by [10]  …”

Section: Bt T S T J F T Rectmentioning

confidence: 99%

Efficient Measurement System to Investigate Micro-Doppler Signature of Ballistic Missile

Choi¹,

Kim²,

Jung³

et al. 2016

International Journal of Aeronautical and Space Sciences

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“…where A l is the amplitude of scattering center l and d l,θ the time delay between the radar and scattering center l. For K targets flying in formation, (2) is changed to [12]…”

Section: Signal Modeling and Imaging Algorithmmentioning

confidence: 99%

“…Efficient algorithms such as range-Doppler [10] and time frequency analysis [11] were proposed to image a single target, but when multiple targets occur in a single radar beam, imaging each target separately is a difficult task. To solve this problem, [12] proposed a segmentation method that can separate ISAR images of aircraft flying in formation; in this method, coarse alignment proposed in [13] was improved by using a combination of a polynomial and Gaussian basis functions, and segmentation was improved using an image processing technique.…”

Section: Introductionmentioning

confidence: 99%

Automatic Recognition of Isar Images of Multiple Targets and Atr Results

Park¹

2014

PIER B

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Inverse synthetic aperture radar (ISAR) imaging is an effective method to identify unknown targets regardless of weather and illumination conditions. Research results published regarding this topic have focused mainly on imaging and automatic target recognition (ATR) of single targets. However, targets generally fly in formation, so the applicability of ISAR images to ATR of multiple targets must be studied. This paper proposes an ATR procedure for targets flying in formation. ATR accuracy derived using five targets composed of point scatterers and the measured radar signal of a Boeing 747 aircraft was as high as that of the solo flight in terms of SNR and the size of the training database; this result shows that ISAR is an adequate tool for ATR even if an image is contaminated by radar reflections from neighboring targets.

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“…Inverse synthetic aperture radar (ISAR) has been widely used for targets imaging in both military and civilian fields due to all day and all weather imaging ability [1][2][3]. High range resolution is achieved by transmitting wideband signals, while high cross-range resolution is obtained by the coherent processing interval.…”

Section: Introductionmentioning

confidence: 99%

Isar Imaging Based on Iterative Reweighted Lp Block Sparse Reconstruction Algorithm

Feng¹,

Zhang²

2016

PIER M

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Abstract-Sparse signal recovery algorithms can be used to improve radar imaging quality by using the sparse property of strong scatterers. Traditional sparse inverse synthetic aperture radar (ISAR) imaging algorithms mainly consider the recovery of sparse scatterers. However, the scatterers of an ISAR target usually exhibit block or group sparse structure. By utilizing the inherent block sparse structure of ISAR target images, an iterative reweighted l p (0 < p ≤ 1) block sparse signal recovery algorithm is proposed to enhance imaging quality in this paper. Firstly, an ISAR imaging signal model is established with the aid of sparse basis, and the imaging is mathematically converted into block reweighted cost function optimization problem. Then, an iterative algorithm is used to solve the reweighted function minimization problem. In each iteration, the weights are updated based on the closed form solution of the previous iteration. The proposed method is effective to exploit the underlying block sparse structures which does not need the prior knowledge of the number of the blocks. Real data ISAR imaging results are provided to verify that the proposed algorithm in this paper can achieve better images than the images obtained by several popular sparse signal recovery algorithms.

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An Efficient Isar Imaging Method for Multiple Targets

Cited by 6 publications

References 14 publications

Efficient Measurement System to Investigate Micro-Doppler Signature of Ballistic Missile

Efficient Measurement System to Investigate Micro-Doppler Signature of Ballistic Missile

Automatic Recognition of Isar Images of Multiple Targets and Atr Results

Isar Imaging Based on Iterative Reweighted Lp Block Sparse Reconstruction Algorithm

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