Artifact reduction within a SAR image
| DWPI Title: Method for reducing and/or filtering undesired artifacts in Synthetic Aperture Radar (SAR) image, involves responsive to extracting communication signal from received radar signal, determining spectral estimation of communication signal |
| Abstract: The various technologies presented herein relate to reducing and/or filtering undesired artifacts in a SAR image, wherein the artifacts are generated by RF interference resulting from a communication signal being included in a radar return which also comprises radar clutter. The radar return is separated into two subapertures, a first subaperture comprising radar clutter only, and a second subaperture comprising radar clutter and the communication signal. The communication signal is extracted from the second subaperture and reapplied to the initially received radar return. Reapplication of the communication signal to the radar return enables any undesired artifacts arising from the communication signal to have their return strength reduced or minimized, while maintaining any desired radar returns in the SAR image. |
| Use: Method for reducing and/or filtering undesired artifacts in a SAR image. |
| Advantage: The filter is applied to an originally received radar return to facilitate removal of an artifacts generated by the communication signal, leaving only a desired radar returns received at the antenna, and in a SAR image generated therefrom. |
| Novelty: The method involves extracting a communication signal from a received radar signal, in which the radar signal comprises radar clutter (110) and the communication signal (120) is bandwidth limited according to at least one parameter associated with the radar clutter. In which extracting the communication signal from the received radar signal comprises of converting a first portion of the radar clutter to a first rectangular array forming a first subaperture and converting the communication signal and a second portion of the radar clutter to a second rectangular array forming a second subaperture. Responsive to extracting the communication signal from the received radar signal, determining a spectral estimation of the communication signal and filtering the received radar signal with the communication signal spectral estimation that removes from the received radar signal an artifact generated due to interference between the communication signal and the radar clutter. |
| Filed: 10/29/2015 |
| Application Number: US14927130A |
| Tech ID: SD 13648.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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