Imaging and Parameter Estimation of Fast-Moving Targets With Single-Antenna SAR

Yang, Jian; Liu, Chang; Wang, Yanfei

doi:10.1109/lgrs.2013.2271691

Cited by 84 publications

(71 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This transform is very effective if applied to raw or range-compressed signals [29][30][31]38], but this process is not a computationally efficient method. Instead of raw signals, here we consider the SLC data with which both azimuth and range compression are already performed, and unlike the rectangular function in Equation (1), the extension of the sinc function in the azimuth dimension in Equation (16) is very limited.…”

Section: Of 16mentioning

confidence: 99%

See 1 more Smart Citation

Fast and Efficient Correction of Ground Moving Targets in a Synthetic Aperture Radar, Single-Look Complex Image

Park¹,

Kim

Won

2017

Remote Sensing

View full text Add to dashboard Cite

Ground moving targets distort normally-focused synthetic aperture radar (SAR) images. Since most high-resolution SAR data providers only offer single-look complex (SLC) data rather than raw signals to general users, they need to apply a simple and efficient residual SAR focusing to SLC data containing moving targets. This paper presents an efficient and effective SAR residual focusing method that is practically applicable to SLC data. The residual Doppler spectrum of the moving target is derived from a general SAR configuration and normal SAR focusing. The processing steps are simple and straightforward, with a limited size of the processing window, e.g., 64 × 64. Application results using simulation data and actual TerraSAR-X SLC data with a speed-controlled vehicle demonstrate the effectiveness of the method, which particularly improves the −3 dB width, integrated sidelobe ratio, and symmetry of the reconstructed signals. In particular, the azimuthal symmetry becomes seriously distorted when the target speed is higher than 8 m/s (or 28.8 km/h), and the symmetry is well recovered by the proposed method.

show abstract

Section: Of 16mentioning

confidence: 99%

“…Various focusing methods for SAR have previously been developed, but most of them are based on raw signal processing [9,12], and recently, many have involved the keystone transformation [29][30][31]. Although several SAR focusing algorithms have been developed for ground moving targets, raw signals rather…”

Section: Introductionmentioning

confidence: 99%

Fast and Efficient Correction of Ground Moving Targets in a Synthetic Aperture Radar, Single-Look Complex Image

Park¹,

Kim

Won

2017

Remote Sensing

View full text Add to dashboard Cite

show abstract

“…After range compression and range curvature correction [25], the signal of the moving target can be rewritten as…”

Section: Signal Modelmentioning

confidence: 99%

Geometry-Information-Aided Efficient Radial Velocity Estimation for Moving Target Imaging and Location Based on Radon Transform

Zhang

Liao

Zhu

et al. 2015

IEEE Trans. Geosci. Remote Sensing

View full text Add to dashboard Cite

Real-time radial velocity estimation is a key challenge for moving target imaging and location in current single-antenna synthetic aperture radar (SAR)-ground moving target indication systems. Since the conventional methods suffer from ambiguity, complexity realization, or heavy computation load for fast moving target motion estimation, this paper emphasizes the estimation efficiency by simple realization. An efficient Radon transform (RT) estimation is proposed to estimate the radial velocity of fast moving target by utilizing the geometry information, and much more geometry information is exploited to realize clutter cancellation, noise cancellation, and estimation error minimizing in the RT domain, which is not proposed by the others. With only two to four angles used to calculate rather than search for the radial velocity of moving targets, the proposed methods simplify the conventional range and angle (2-D) searching procedure into several time range (1-D) searching procedure efficiently. The theoretical and experimental analysis provides qualitative and quantitative evaluations into the effectiveness of the proposed methods. In the single-antenna SAR system, the proposed methods can estimate the radial velocity of fast moving target efficiently and accurately in high signal to clutter plus noise ratio scenarios.Index Terms-Efficient estimation, geometry information, radial velocity estimation, Radon transform (RT), synthetic aperture radar (SAR)-ground moving target indication (GMTI).

show abstract

“…The processing of ground moving targets has been a very hot topic for SAR, including their detection, imaging and relocation, etc.. At present, there have been a lot of literatures dealing with these issues [3][4][5][6][7]. The general processing scheme for a ground moving target is as follows: we first suppress the surrounding stationary clutter and then detect it before imaging, and finally relocate it to the right position in SAR image after focused imaging.…”

Section: Introductionmentioning

confidence: 99%

Analysis on the Azimuth Shift of a Moving Target in Sar Image

Yang¹,

Zhang²

2015

PIER M

View full text Add to dashboard Cite

Abstract-As we know, a moving target's azimuth shift in synthetic aperture radar (SAR) image is proportional to the projected velocity of its across-track velocity in the slant-range plane. Therefore, we can relocate the moving target in SAR image after estimating its velocity. However, when the Doppler ambiguity occurs due to the limitation of the SAR system's pulse repetition frequency (PRF), this relationship will not hold any more, in this case, we cannot relocate the moving target to the right position. The Doppler spectrum of a moving target with arbitrary velocity may entirely situate in a PRF band or span in two neighboring PRF bands. In this paper, we conduct a detailed theoretical analysis on the moving target's azimuth shift for these two scenarios. According to the derived formulas, one can relocate a moving target with arbitrary velocity to the right position no matter the Doppler ambiguity occurs or not. Simulated data are processed to validate the analysis.

show abstract

Imaging and Parameter Estimation of Fast-Moving Targets With Single-Antenna SAR

Cited by 84 publications

References 7 publications

Fast and Efficient Correction of Ground Moving Targets in a Synthetic Aperture Radar, Single-Look Complex Image

Fast and Efficient Correction of Ground Moving Targets in a Synthetic Aperture Radar, Single-Look Complex Image

Geometry-Information-Aided Efficient Radial Velocity Estimation for Moving Target Imaging and Location Based on Radon Transform

Analysis on the Azimuth Shift of a Moving Target in Sar Image

Contact Info

Product

Resources

About