Name
Abstract | ||
|---|---|---|
High-resolution spaceborne synthetic aperture radar (SAR) mainly poses two challenges to signal processing. The first challenge involves the signal model, where a precise range equation of spaceborne SAR should be considered as the conventional hyperbolic range equation fails to precisely describe the range history in the high-resolution case. The second challenge is an efficient focusing algorithm since the existing SAR processors are inaccurate or inefficient for high-resolution spaceborne SAR. Therefore, in this paper, a novel fourth-order polynomial range equation based on Doppler parameters is proposed, and the method for parameter determination is also addressed. Compared with conventional range equations, the presented one is more accurate and concise for low-earth-orbit SAR so that a higher azimuth resolution can be achieved. Based on the range model, a 2-D spectrum is derived, and an extended range Doppler domain algorithm for SAR image formation in the sliding spotlight mode is also developed. Additionally, we carried out several simulations to validate the presented approach. Results demonstrate high performances of the focusing algorithm as well as the range equation. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1109/TGRS.2013.2273086 | IEEE T. Geoscience and Remote Sensing |
Keywords | Field | DocType |
high-resolution leo sar,synthetic aperture radar,sar processor,signal processing,fourth-order polynomial range equation,imaging approach,high resolution,low earth orbit (leo),high-resolution spaceborne synthetic aperture radar,doppler radar,image resolution,low-earth-orbit sar,range doppler algorithm (rda),signal model,focusing algorithm,remote sensing by radar,doppler parameters,fourth-order doppler range model (drm4),sliding spotlight mode,focusing,sar image formation,high-order range model,radar resolution,extended range doppler domain algorithm,2d spectrum,high-resolution spaceborne sar,spaceborne radar,radar imaging,parameter determination,azimuth resolution,azimuth,doppler effect,mathematical model | Pulse-Doppler radar,Continuous-wave radar,Doppler radar,Radar imaging,Synthetic aperture radar,Space-based radar,Remote sensing,Inverse synthetic aperture radar,3D radar,Mathematics | Journal |
Volume | Issue | ISSN |
52 | 6 | 0196-2892 |
Citations | PageRank | References |
11 | 0.63 | 12 |
Authors | ||
6 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Y. Luo | 1 | 22 | 3.71 |
| Bingji Zhao | 2 | 20 | 1.70 |
| Xiaolei Han | 3 | 32 | 3.17 |
| Robert Wang | 4 | 393 | 54.64 |
| Hongjun Song | 5 | 35 | 5.60 |
| Yunkai Deng | 6 | 292 | 54.84 |