Apodization of spurs in radar receivers using multi-channel processing
| DWPI Title: System i.e. synthetic aperture radar, for apodizing spurs, has pixel selector for determining that one of first or second minimum energies is less than threshold energy, and for identifying two pixels as being spurious energy pixels |
| Abstract: The various technologies presented herein relate to identification and mitigation of spurious energies or signals (aka “spurs”) in radar imaging. Spurious energy in received radar data can be a consequence of non-ideal component and circuit behavior. Such behavior can result from I/Q imbalance, nonlinear component behavior, additive interference (e.g. cross-talk, etc.), etc. The manifestation of the spurious energy in a radar image (e.g., a range-Doppler map) can be influenced by appropriate pulse-to-pulse phase modulation. Comparing multiple images which have been processed using the same data but of different signal paths and modulations enables identification of undesired spurs, with subsequent cropping or apodization of the undesired spurs from a radar image. Spurs can be identified by comparison with a threshold energy. Removal of an undesired spur enables enhanced identification of true targets in a radar image. |
| Use: System i.e. synthetic aperture radar (claimed), for apodizing spurs in radar receivers using multi-channel processing. |
| Advantage: The system uses a computing device to modulate and de-modulate multiple signals to enable multiple spurs to be identified in a radar image during target identification, so that the computing device can control phase modulation/demodulation operations. |
| Novelty: The system (100) has nine pixels provided such that a pixel selector for comparing first and second minimum energies of the eighth and ninth pixels in a composite image with a threshold energy, where the first minimum energy of the eighth pixel is a minimum energy of second energy of the second pixel and the fourth energy of the sixth pixel. The pixel selector determines that one of the first minimum energy or second minimum energy is less than the threshold energy. The pixel selector identifies the second and fifth pixels as being spurious energy pixels based upon comparison. |
| Filed: 12/4/2014 |
| Application Number: US14560147A |
| Tech ID: SD 13077.0 |
| 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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