Spatial-Variant Phase Error Compensation for Widebeam Spotlight Synthetic Aperture Radar
| Autor: | Nurullah Akkaya, Pavel A. Makarov, Ersin Aytac |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Synthetic aperture radar
Autofocus Computer science 020208 electrical & electronic engineering 0211 other engineering and technologies 02 engineering and technology Compensation (engineering) law.invention Azimuth Quadratic equation Exact algorithm law 0202 electrical engineering electronic engineering information engineering Joint (audio engineering) Algorithm 021101 geological & geomatics engineering Degradation (telecommunications) |
| Zdroj: | 2020 17th European Radar Conference (EuRAD). |
| DOI: | 10.1109/eurad48048.2021.00047 |
| Popis: | The conventional approach to the signal-based compensation of the spatial-variant (SV) phase error consists in dividing the image into subpatches, followed by an independent compensation of the spatial-invariant error in each subpatch. This method suffers from performance degradation in the case of a low signal-to-noise ratio (SNR), owing to the neglect of the inter-subpatch relation of the errors. In this paper, we propose an advanced approach, in which joint subpatch processing is employed in order to estimate the parameters of the motion error inducing the SV phase error. An exact algorithm for the compensation of the quadratic SV azimuth phase error is presented and validated through computer simulations. The algorithm demonstrates improved performance when applied to low SNR imagery. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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