Nonlinear Transformations of Pulsed Signals in Radar Tomography
This paper considers two methods for improving the visibility of hidden objects in radar tomography using nonlinear time transformations of short ultra-wideband (UWB) pulses. The first method is based on selection of a digital coherent jitter formed by special nonlinear signal transformation. The re...
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| Veröffentlicht in: | Russian physics journal 2020-06, Vol.63 (2), p.185-195 |
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| creator | Shipilov, S. E. Yakubov, V. P. |
| description | This paper considers two methods for improving the visibility of hidden objects in radar tomography using nonlinear time transformations of short ultra-wideband (UWB) pulses. The first method is based on selection of a digital coherent jitter formed by special nonlinear signal transformation. The resulting increase in the contribution of high-frequency components to the reflected signal spectrum improves the spatial resolution of images of hidden objects. The second method uses relatively powerful monochromatic side irradiation in the clocked mode to detect a target. This leads to a characteristic distortion of the radar sensing pulse reflected from nonlinear radio-electronic elements – parts of the target being located. The observed change in the radar pulse waveform allows selective tomography of nonlinear radio-electronic elements to be carried out. |
| doi_str_mv | 10.1007/s11182-020-02020-8 |
| format | Article |
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| subjects | Condensed Matter Physics Hadrons Heavy Ions Lasers Mathematical and Computational Physics Nuclear Physics Optical Devices Optics Photonics Physical Sciences Physics Physics and Astronomy Physics of Interaction of Radio Waves with Non-Uniform Media Physics, Multidisciplinary Science & Technology Spatial resolution Target detection Theoretical Tomography Transformations Ultrawideband Ultrawideband radar Vibration Visibility Waveforms |
| title | Nonlinear Transformations of Pulsed Signals in Radar Tomography |
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