Results 11 to 20 of about 118,769 (293)
Normal Doppler Frequency Shift in Negative Refractive‐Index Systems [PDF]
Laser & Photonics Reviews, 2019 AbstractBesides the well‐known negative refraction, a negative refractive‐index material can exhibit another two hallmark features, which are the inverse Doppler effect and backward Cherenkov radiation. The former is known as the motion‐induced frequency shift that is contrary to the normal Doppler effect, and the latter refers to the Cherenkov ...
Xiao Lin, Baile Zhang
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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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Micro-Doppler Parameters Extraction of Precession Cone-Shaped Targets Based on Rotating Antenna
Remote Sensing, 2022 Micro-Doppler is regarded as a unique signature of a target with micro-motions. The sophisticated recognition of the cone-shaped targets can be realized through the micro-Doppler effect.
Zhihao Wang +4 more
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Spectral and temporal gating mechanisms enhance the clutter rejection in the echolocating bat, Rhinolophus rouxi [PDF]
, 1991 Doppler shift compensation behaviour in horseshoe bats, Rhinolophus rouxi, was used to test the interference of pure tones and narrow band noise with compensation performance.
Neumann, Ingrid, Schuller, Gerd
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Storage of Doppler-Shift Information in the Echolocation System of the "CF-FM"-Bat, Rhinolophus ferrumequinum [PDF]
, 1976 The greater horseshoe bat (Rhinolophus ferrumequinum) emits echolocation sounds consisting of a long constant-frequency (CF) component preceeded and followed by a short frequency-modulated (FM) component. When an echo returns with an upward Doppler-shift,
Schuller, Gerd, Suga, Nobuo
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Sharing a common origin between the rotational and linear doppler effects [PDF]
, 2017 The well-known linear Doppler effect arises from the linear motion between source and observer, while the less well-known rotational Doppler effect arises from the rotational motion.
Allen +40 more
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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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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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Remote Sensing, 2022 In addition to traditional linear Doppler shift, the angular Doppler shift in vortex electromagnetic wave (VEMW) radar systems carrying orbital angular momentum (OAM) can provide more accurate target identification micro-motion parameters, especially the
Lijun Bu +5 more
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A Novel Waveform Design Method for Shift-Frequency Jamming Confirmation
International Journal of Antennas and Propagation, 2018 Shift-frequency jamming is generally used to form range false targets for ground-based early-warning radar systems; the frequency shift value of such interference is larger than the Doppler shift value of the moving target, and the key element to ...
Chang Zhou, Zhen-Bo Zhu, Zi-Yue Tang
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