Extended envelope correlation for range bin alignment in ISAR

Muñoz‐Ferreras, José‐María; Pérez-Martínez, F.

doi:10.1049/cp:20070515

Cited by 16 publications

(24 citation statements)

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“…which is the usual expression of the roundtrip for the extended 'stop-go' model for the fast moving targets in the ISAR [7][8][9][10][11][12][13][14][15][16][17]. In that model, only the slant range caused by the motion during the pulse propagating time is considered, and the motion during the pulse transmitting and receiving times has been ignored.…”

Section: Accurate Echo Geometrymentioning

confidence: 99%

“…After multiplying (14) by (15), the effect of t i is removed [20]. After we process all the sequences D n (t k , t m ) (n = 0, 1, …, N − 1) in the same way, the effect of the slow time t n in each burst is removed, which means that the echo signal in (7) degenerates to the functions of t k and t m .…”

Section: Coherence Restorationmentioning

confidence: 99%

“…Besides, any target's motion causes the Doppler effect in a burst. To obtain an HRRP, the target's motion in a single burst should be compensated for well, and a variety of motion compensation methods have been proposed for the ISAR [7][8][9][10][11][12] and the SF-ISAR [13][14][15][16][17] in the past decades. The translational motion compensation in the ISAR usually consists of two steps: envelope alignment and phase autofocus.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Stepped frequency synthetic preprocessing algorithm for inverse synthetic aperture radar imaging in fast moving target echo model

Zhou

Sun

Xia³

et al. 2014

IET Radar, Sonar & Navigation

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This paper first introduces an accurate inverse synthetic aperture radar echo model for the fast moving targets. In this model, the target's motion during the time periods of the pulse transmitting, propagating and receiving have been taken into account, and some problems, which have been ignored in the 'stop-go' model, may occur, for example, the varied ambiguity numbers and the drifted frequency centre. These problems will cause many difficulties in obtaining a high resolution range profile (HRRP) synthesis. To deal with these problems, a stepped frequency synthetic preprocessing (SFSP) algorithm is presented. The key of the proposed algorithm is synthetic preprocessing, including Doppler ambiguity suppression, echo coherence restoration and frequency centre correction, respectively. By completing the preprocessing, the HRRP can be achieved by a bandwidth synthesis and a well-focused image can be obtained by a keystone transform and an azimuth process, respectively. The simulation results validate the proposed SFSP algorithm by comparing it with the algorithm in the existing extended 'stop-go' model.

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Section: Accurate Echo Geometrymentioning

confidence: 99%

Section: Coherence Restorationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Stepped frequency synthetic preprocessing algorithm for inverse synthetic aperture radar imaging in fast moving target echo model

Zhou

Sun

Xia³

et al. 2014

IET Radar, Sonar & Navigation

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“…Correlation is a commonly used cost function in range bin alignment techniques [10] [11]. Wang [6] defines the global envelope correlation as quality measure for range bin alignment, given in (4).…”

Section: Global Envelope Correlationmentioning

confidence: 99%

Quality measures for HRR alignment based ISAR imaging algorithms

Rensburg

Mishra

Nel

2013

2013 IEEE Radar Conference (RadarCon13)

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Some Inverse Synthetic Aperture Radar (ISAR) algorithms form the image in a two-step process of range alignment and phase conjugation. This paper discusses a comprehensive set of measures used to quantify the quality of range alignment, with the aim of 1) reviewing their benefits and shortcomings and 2) comparing their relative performance. Some quality measures may favour particular alignment techniques without adequately indicating improved alignment, so using multiple quality measures provide an added means of verifying the alignment quality achieved by any alignment technique. The sensitivity of the quality measures to slight misalignment of profiles and the effects of noise is also investigated.

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“…Translation compensation consists of range tracking for data alignment in range cells and Doppler tracking for azimuth phase adjustment. Range alignment is relatively simple and discussed in many literatures through envelop correlation [6,7] or global range alignment [8]. Phase adjustment is more complicated and various methods including prominent point processing [9], phase gradient method [10], maximum contrast method [11], minimum entropy method [12] and so on have been actively addressed for SAR and ISAR autofocusing.…”

Section: Introductionmentioning

confidence: 99%

High Resolution Full-Aperture ISAR Processing through Modified Doppler History Based Motion Compensation

Song

Lee

et al. 2017

Sensors

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A high resolution inverse synthetic aperture radar (ISAR) technique is presented using modified Doppler history based motion compensation. To this purpose, a novel wideband ISAR system is developed that accommodates parametric processing over extended aperture length. The proposed method is derived from an ISAR-to-SAR approach that makes use of high resolution spotlight SAR and sub-aperture recombination. It is dedicated to wide aperture ISAR imaging and exhibits robust performance against unstable targets having non-linear motions. We demonstrate that the Doppler histories of the full aperture ISAR echoes from disturbed targets are efficiently retrieved with good fitting models. Experiments have been conducted on real aircraft targets and the feasibility of the full aperture ISAR processing is verified through the acquisition of high resolution ISAR imagery.

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Extended envelope correlation for range bin alignment in ISAR

Cited by 16 publications

References 0 publications

Stepped frequency synthetic preprocessing algorithm for inverse synthetic aperture radar imaging in fast moving target echo model

Stepped frequency synthetic preprocessing algorithm for inverse synthetic aperture radar imaging in fast moving target echo model

Quality measures for HRR alignment based ISAR imaging algorithms

High Resolution Full-Aperture ISAR Processing through Modified Doppler History Based Motion Compensation

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