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Doppler effect tailoring: extra-red shift of structured light [PDF]
Nature CommunicationsDoppler effect is a universal phenomenon that describes the frequency shift of waves when interacting with moving targets. Recent studies suggest that the spatial structures of light beams would provide a modification of the group and phase velocities of
Zhenyu Wan, Ziyi Tang, Jian Wang
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Optimal nonlinear fi ltering of stochastic processes in rescue radar [PDF]
Радиофизика и электроника, 2021 Subject and Purpose. Smoke, fog, avalanches, debris of collapsed structures and other optically opaque obstacles in both natural and man-made disasters make optical sensors useless for detecting victims.
O.V. Sytnik
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Multi-frequency observations of E-region HF radar aurora [PDF]
Annales Geophysicae, 2003 Multi-frequency observations of E-region coherent backscatter from decametre waves reveal that auroral echoes tend to comprise two spectral components superimposed, one at low Doppler shifts, below 250 ms-1, and the other Doppler shifted to near ...
S. E. Milan, M. Lester, N. Sato
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IEEE Photonics Journal, 2023 In this article, the wavelength division multiplexing (WDM) technology is applied to the space chaotic laser communication system. We deduce the bit error rate (BER) model of multi-channel space chaotic laser communication with Doppler frequency shift ...
Mi Li +5 more
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Journal of Marine Science and Engineering, 2021 Velocity is vital information for navigation and oceanic engineering. Coherent Doppler sonar is an accurate tool for velocity measurement, but its use is limited due to velocity ambiguity.
Peng Liu, Nobuyoshi Kouguchi, Ying Li
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Study on the Impact of the Doppler Shift for CO2 Lidar Remote Sensing
Remote Sensing, 2022 Atmospheric carbon dioxide (CO2) is recognized as the most important component of the greenhouse gases, the concentration of which has increased rapidly since the pre-industrial era due to anthropogenic emissions of greenhouse gases (GHG).
Xifeng Cao +6 more
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Leida xuebao, 2013 The active decoy jamming to SAR based on the Time-Delay Doppler-Shift (TDDS) method takes effect in certain region. Proper utilization of jamming ensuring decoy quality is based on the study of the effective region. After the mathematical analysis of the
Liu Yong-cai +3 more
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IEEE Access, 2022 Weighted fractional Fourier transform encrypted chaotic direct sequence spread spectrum (WFRFT-CD3S) signal is aperiodic and complex Gaussian distributed.
Jiangyan He +3 more
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A Doppler Shift Factor Estimation Method for High Speed Mobile Underwater Acoustic Communication [PDF]
Jisuanji gongcheng, 2016 In underwater acoustic communication systems,most of the Doppler shift factor estimation methods cannot deal with the relationship between computational complexity and estimation accuracy under high relative motion speed.In view of this,this paper ...
YANG Jie,ZHOU Shengyuan,YU Fengqi
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Leida xuebao, 2019 Doppler center shift is an important parameter for Synthetic Aperture Radar(SAR) to retrieve ocean surface wind field and ocean surface current field. We present a calculation method of Doppler centroid shift for airborne side-looking SAR.
ZHAO Xianbin +4 more
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