Results 221 to 230 of about 120,318 (255)
Some of the next articles are maybe not open access.
Range ambiguity and pulse interval jitter in the bottlenose dolphin
The Journal of the Acoustical Society of America, 1983A common problem of pulse-mode sonar systems which utilize range gating is the range ambiguity caused by echoes from objects at multiple distances returning simultaneously. Research conducted at the Naval Ocean Systems Center, Oahu, Hawaii, investigating bottlenose dolphin echolocation indicate that there is adequate varying of consecutive interpulse ...
J, Kadane, R, Penner
openaire +2 more sources
SAR range ambiguity suppression via sparse regularization
2012 IEEE International Geoscience and Remote Sensing Symposium, 2012Range ambiguity in synthetic aperture radar (SAR) imaging primarily arises from scattered energy of bright targets outside the interested region. So to reduce the ambiguity, we need to identify these targets additionally, which yields an ill-posed problem.
Jian Fang 0001 +4 more
openaire +1 more source
Improved Range Ambiguity Performance in Quad-Pol SAR
IEEE Transactions on Geoscience and Remote Sensing, 2012Conventional quadrature-polarimetric (quad-pol) synthetic aperture radar (SAR) systems operating from space are severely constrained by their limited range of useful incident angles and their reduced swath widths particularly at larger incidence.
Russell Keith Raney +2 more
openaire +2 more sources
The Range Ambiguity Suppression Based On Amplitude Modulation Chirp
IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019Range and azimuth ambiguities are contradictory in SAR system, which restrict the improvements of resolution and swath in satellite platform. Multichannel needs big and complex antenna. And it is proved that orthogonal transmitting signals cannot suppress range ambiguity.
Peng Xiao 0001 +3 more
openaire +1 more source
REDUCTION OF RANGE AMBIGUITY IN THE MADRE RADAR
1964Abstract : The Madre radar, a coherent, moving-targetindicating (MTI) radar which utilizes highfrequency ionospheric propagation to extend its range beyond the geometric horizon, has been used repeatedly for tracking aircraft targets at ranges as great as 2000 nautical miles and for detecting launch-phase ballistic missiles from the Atlantic and ...
J. M. Headrick, J. R. Davis
openaire +1 more source
Networked Waveform System for Range Velocity Ambiguity Mitigation
IGARSS 2008 - 2008 IEEE International Geoscience and Remote Sensing Symposium, 2008A networked waveform system is developed to overcome the fundamental limitation of a single pulsed Doppler radar in resolving ambiguities. The networked radar system uses the principle that the underlying intrinsic properties of the precipitation medium remain consistent in a network.
Nitin Bharadwaj, V. Chandrasekar 0001
openaire +2 more sources
Optimal Beamforming for Range-Doppler Ambiguity Minimization in Squinted SAR
IEEE Transactions on Aerospace and Electronic Systems, 2013A method is proposed to optimize the radiation pattern of a planar array in order to maximize the signal-to-ambiguity-ratio for a squinted synthetic aperture radar (SAR) observation geometry. The optimal beamformer is the generalized eigenvector associated with a pair of matrices that depends on observation geometry and the Earth reflectivity model ...
Paolo Di Lorenzo +2 more
openaire +3 more sources
ULTRASOUND CORNER: RANGE AMBIGUITY ARTIFACT
Veterinary Radiology & Ultrasound, 2001R T, O'Brien +2 more
openaire +2 more sources
Generalized Ambiguity Function for FDA Radar Joint Range, Angle and Doppler Resolution Evaluation
IEEE Geoscience and Remote Sensing Letters, 2022Bang Huang, Wen-Qin Wang, Yan Sun
exaly