Results 41 to 50 of about 23,415 (245)
Motion Mitigation Techniques for Abdominal and Cardiac MR Imaging
Journal of Magnetic Resonance Imaging, EarlyView.ABSTRACT MRI of the heart and abdominal organs provides unparalleled soft tissue contrast and quantitative biomarkers, yet remains highly susceptible to physiological motion. Contractions of the myocardium, respiratory excursions, peristalsis, vascular pulsatility, and unpredictable bulk patient movement generate artifacts that impair image quality ...
Eric M. Schrauben +3 more
wiley +1 more source
A Robust Orthogonal Matching Pursuit Method for Doppler Reconstruction of PRI‐Staggered Radar
IET Radar, Sonar & NavigationThe utilisation of staggered pulse repetition intervals (PRIs) in pulse‐Doppler (PD) radar systems is instrumental in expanding the unambiguous Doppler interval, which is traditionally confined by the constraints of uniform PRIs, and in enhancing the ...
Xianwen Zhang +3 more
doaj +1 more source
A wing pod-based millimeter wavelength airborne cloud radar [PDF]
Geoscientific Instrumentation, Methods and Data Systems, 2015 This paper describes a novel, airborne pod-based millimeter (mm) wavelength radar. Its frequency of operation is 94 GHz (3 mm wavelength). The radar has been designed to fly on the NCAR Gulfstream V HIAPER aircraft; however, it could be deployed on other
J. Vivekanandan +8 more
doaj +1 more source
Coordinating Complementary Waveforms for Sidelobe Suppression
, 2011 We present a general method for constructing radar transmit pulse trains and receive filters for which the radar point-spread function in delay and Doppler, given by the cross-ambiguity function of the transmit pulse train and the pulse train used in the
Calderbank, Robert +4 more
core +1 more source
FMCW rail-mounted SAR: Porting spotlight SAR imaging from MATLAB to FPGA [PDF]
, 2014 In this work, a low-cost laptop-based radar platform derived from the MIT open courseware has been implemented. It can perform ranging, Doppler measurement and SAR imaging using MATLAB as the processor.
Gray, D., Le Kernec, J., Melnikov, A.
core +1 more source
Journal of Geophysical Research: Atmospheres, Volume 131, Issue 3, 16 February 2026.Abstract Low‐level jets (LLJs), as dynamically significant narrow air currents in the lower troposphere, profoundly influence regional weather and anthropogenic activities. Motivated by persistent LLJs detected through Doppler LiDAR observations during March to April 2021, this study systematically characterizes these LLJs over Juehua Island (western ...
W. C. Lian, X. Q. Song, Y. Y. Fu
wiley +1 more source
IET Signal ProcessingToday, modern radar systems increase their target detection capabilities by processing pulses coherently. If these radars do not take precautions against the Doppler frequency shift caused by the moving target, their performance will decrease.
Alper Yildirim, Serkan Kiranyaz
doaj +1 more source
Lead and Floe Detection From CryoSat‐2 Radar and ICESat‐2 Laser Altimetry
Earth and Space Science, Volume 13, Issue 2, February 2026.Abstract Differences in satellite sampling affect their ability to resolve small‐scale features over Arctic sea ice. For CryoSat‐2 (CS2) and ICESat‐2 (IS2) these differences are driven by geometric (footprint resolution) and radiometric (radar or laser) sampling.
R. Tilling +8 more
wiley +1 more source
IEEE Access, 2018 The radar echoes of moving targets in a clutter background are extremely weak and their characteristics are complex. A low-observable moving target detection technology has become a key constraint to radar performance, requiring the radar to provide ...
Xiaolong Chen +4 more
doaj +1 more source
Data analysis techniques: Spectral processing [PDF]
, 1983 The individual steps in the data processing scheme applied to most radars used for wind sounding are analyzed. This processing method uses spectral analysis and assumes a pulse Doppler radar.
Strauch, R. G.
core +1 more source