Name
Title | ||
|---|---|---|
Improvements to the Frequency Division-Based Subaperture Algorithm for Motion Compensation in Wide-Beam SAR |
Abstract | ||
|---|---|---|
Motion compensation (MoCo) is pivotal in the processing of airborne synthetic aperture radar (SAR) data. Motion errors are space variant according to the data acquisition geometry, which can be split into range-variant and azimuth-variant components. In the processing of wide-beam SAR data, the azimuth variance must be considered. Several approaches have been proposed, among which the subaperture algorithm based on frequency division (FD) is a good choice if motion errors involve high-frequency components. However, there are two drawbacks to using this algorithm in conditions where the magnitude of motion errors is large, i.e., the invalidation of the time-frequency relation in an FD with too many subapertures and paired echoes caused by periodic discontinuities in the azimuth phase history. Theoretical analysis and simulations are presented to demonstrate these two drawbacks. Improvements are then made on the traditional algorithm: implementing the FD after the subaperture MoCo instead of before it and adopting a nonuniform FD scheme rather than a uniform one. Finally, the validity of the improved algorithm is further demonstrated by experimental results with real data. |
Year | DOI | Venue |
|---|---|---|
2013 | 10.1109/LGRS.2012.2236817 | IEEE Geosci. Remote Sensing Lett. |
Keywords | Field | DocType |
synthetic aperture radar,motion compensation,frequency division based subaperture algorithm,synthetic aperture radar (sar),wide beam sar,frequency division (fd)-based subaperture algorithm,time-frequency relation,motion compensation (moco),subaperture moco,time–frequency relation,airborne radar,motion errors,paired echo suppression,radar imaging,airborne synthetic aperture radar | Continuous-wave radar,Synthetic aperture radar,Motion compensation,Remote sensing,Azimuth,Artificial intelligence,Computer vision,Radar imaging,Side looking airborne radar,Data acquisition,Algorithm,Inverse synthetic aperture radar,Mathematics | Journal |
Volume | Issue | ISSN |
10 | 5 | 1545-598X |
Citations | PageRank | References |
4 | 0.45 | 6 |
Authors | ||
5 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Yan-lei Li | 1 | 5 | 5.54 |
| Xingdong Liang | 2 | 51 | 8.76 |
| Chi-biao Ding | 3 | 16 | 6.83 |
| Liangjiang Zhou | 4 | 42 | 4.18 |
| Quan Ding | 5 | 4 | 0.45 |