Name
Title | ||
|---|---|---|
High-Resolution Inverse Synthetic Aperture Radar Imaging and Scaling With Sparse Aperture |
Abstract | ||
|---|---|---|
In high-resolution radar imaging, the rotational motion of targets generally produces migration through resolution cells (MTRC) in inverse synthetic aperture radar (ISAR) images. Usually, it is a challenge to realize accurate MTRC correction on sparse aperture (SA) data, which tends to degrade the performance of translational motion compensation and SA-imaging. In this paper, we present a novel algorithm for high-resolution ISAR imaging and scaling from SA data, which effectively incorporates the translational motion phase error and MTRC corrections. In this algorithm, the ISAR image formation is converted into a sparsity-driven optimization via maximum a posterior (MAP) estimation, where the statistics of an ISAR image is modeled as complex Laplace distribution to provide a sparse prior. The translational motion phase error compensation and cross-range MTRC correction are modeled as joint range-invariant and range-variant phase error corrections in the range-compressed phase history domain. Our proposed imaging approach is performed by a two-step process: 1) the range-invariant and range-variant phase error estimations using a metric of minimum entropy are employed and solved by using a coordinate descent method to realize a coarse phase error correction. Meanwhile, the rotational motion can be obtained from the estimation of range-variant phase errors, which is used for ISAR scaling in the cross-range dimension; 2) under a two-dimensional (2-D) Fourier-based dictionary by involving the slant-range MTRC, joint MTRC-corrected ISAR imaging and accurate phase adjustment are realized by solving the sparsity-driven optimization with SA data, where the residual phase errors are treated as model error and removed to achieve a fine correction. Finally, some experiments based on simulated and measured data are performed to confirm the effectiveness of the proposed algorithm. |
Year | DOI | Venue |
|---|---|---|
2015 | 10.1109/JSTARS.2015.2439266 | Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of |
Keywords | Field | DocType |
inverse synthetic aperture radar (isar),migration through resolution cells (mtrc),phase error correction,sparsity,error correction,imaging,radar imaging,image resolution,estimation | Aperture,Residual,Computer vision,Radar imaging,Remote sensing,Inverse synthetic aperture radar,Image formation,Error detection and correction,Artificial intelligence,Coordinate descent,Image resolution,Mathematics | Journal |
Volume | Issue | ISSN |
PP | 99 | 1939-1404 |
Citations | PageRank | References |
8 | 0.59 | 26 |
Authors | ||
6 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Gang Xu | 1 | 91 | 6.98 |
| Mengdao Xing | 2 | 1340 | 162.45 |
| Xiang-gen Xia | 3 | 5167 | 410.80 |
| qianqian chen | 4 | 10 | 1.59 |
| Lei Zhang | 5 | 147 | 13.11 |
| Zheng Bao | 6 | 1985 | 155.03 |