Changes in Internal Carotid Artery Doppler Velocity Measurements With Different Angles of Insonation
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Ultrasound in Medicine"
DOI: 10.1002/jum.15579
Abstract: Doppler velocity measurements are fundamental diagnostic criteria for vascular ultrasound examinations. Insonation angles are kept to 60° or less to minimize error. The purpose of this study was to assess variance of Doppler‐detected peak systolic… read more here.
Keywords: velocity; doppler; doppler velocity; different angles ... See more keywords
Picking up Speed: Continuous-Time Lidar-Only Odometry Using Doppler Velocity Measurements
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Robotics and Automation Letters"
DOI: 10.1109/lra.2022.3226068
Abstract: Frequency-Modulated Continuous-Wave (FMCW) lidar is a recently emerging technology that additionally enables per-return instantaneous relative radial velocity measurements via the Doppler effect. In this letter, we present the first continuous-time lidar-only odometry algorithm using these… read more here.
Keywords: doppler velocity; odometry; velocity measurements; velocity ... See more keywords
Are Doppler Velocity Measurements Useful for Spinning Radar Odometry?
Sign Up to like & getrecommendations! Published in 2024 at "IEEE Robotics and Automation Letters"
DOI: 10.1109/lra.2024.3505821
Abstract: Spinning, frequency-modulated continuous-wave (FMCW) radars with $360 ^{\circ }$ coverage have been gaining popularity for autonomous-vehicle navigation. However, unlike ‘fixed’ automotive radar, commercially available spinning radar systems typically do not produce radial velocities due to… read more here.
Keywords: odometry; velocity measurements; radar; spinning radar ... See more keywords
Doppler Velocity Bias Mitigation Through Sidelobe Whitening for Multistatic Weather Radar
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Transactions on Geoscience and Remote Sensing"
DOI: 10.1109/tgrs.2020.2997882
Abstract: Multistatic radar is a promising option for the low-cost collection of multiple-Doppler weather observations. However, due to the use of low-directivity antennas at the receivers in these systems, they typically suffer from extremely high two-way… read more here.
Keywords: doppler velocity; weather; sidelobe whitening; sidelobe ... See more keywords
An Accurate Ocean Doppler Velocity Estimation Approach for Azimuth MC-HRWS SAR System
Sign Up to like & getrecommendations! Published in 2024 at "IEEE Transactions on Geoscience and Remote Sensing"
DOI: 10.1109/tgrs.2024.3452118
Abstract: In recent years, multiple synthetic aperture radar (SAR) satellites, such as Radarsat-2 and Gaofen-3 (GF-3) spaceborne SAR systems have adopted multichannel high-resolution and wide-swath (MC-HRWS) imaging technology, which can overcome the resolution and mapping width… read more here.
Keywords: hrws; velocity estimation; doppler; sar ... See more keywords
An Iterative Doppler Velocity Log Error Calibration Algorithm Based on Newton Optimization
Sign Up to like & getrecommendations! Published in 2020 at "Mathematical Problems in Engineering"
DOI: 10.1155/2020/3194034
Abstract: The performance of the inertial navigation system/Doppler velocity log (INS/DVL) is mainly degraded by DVL error. An optimization-based algorithm is widely used and effective on calibrating DVL error. In this algorithm, the loss function established… read more here.
Keywords: newton optimization; error; optimization; calibration ... See more keywords
Longitudinal Intracardiac Right Ventricular Flow Analysis in Infants With Hypoplastic Left Heart Syndrome in Interstage I Using Novel Doppler Velocity Reconstruction.
Sign Up to like & getrecommendations! Published in 2025 at "Journal of the American Heart Association"
DOI: 10.1161/jaha.125.041734
Abstract: Background Echocardiography provides noninvasive frontline assessment of right ventricular (RV) function in hypoplastic left heart syndrome (HLHS). However, conventional metrics do not quantify RV intracardiac hemodynamics. A novel Doppler velocity reconstruction measures kinetic energy, vortex… read more here.
Keywords: energy; heart; doppler; interstage ... See more keywords
A Variational Method for Filling in Missing Data in Doppler Velocity Fields
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Atmospheric and Oceanic Technology"
DOI: 10.1175/jtech-d-20-0151.1
Abstract: Single-Doppler radar data are often missing in important regions of a severe storm due to low return power, low signal-to-noise ratio, ground clutter associated with normal and anomalous propagation, and missing radials associated with partial… read more here.
Keywords: velocity; doppler; method; doppler velocity ... See more keywords
Microwave Photonics Broadband Doppler Velocity Simulator with High Spurious Suppression Ratio by Using Serrodyne Modulation
Sign Up to like & getrecommendations! Published in 2024 at "Photonics"
DOI: 10.3390/photonics11040357
Abstract: A Doppler velocity simulation method based on serrodyne modulation is proposed to achieve the frequency shift from hundred hertz to megahertz. One sub-phase modulation (PM) in a dual-parallel dual-drive Mach–Zehnder modulator loads a sawtooth signal… read more here.
Keywords: doppler velocity; modulation; photonics; frequency ... See more keywords
Identifying insects, clouds, and precipitation using vertically pointing polarimetric radar Doppler velocity spectra
Sign Up to like & getrecommendations! Published in 2021 at "Atmospheric Measurement Techniques"
DOI: 10.5194/amt-14-4425-2021
Abstract: Abstract. This study presents a method to identify and distinguish insects, clouds, and precipitation in 35 GHz (Ka-band) vertically pointing polarimetric radar Doppler velocity power spectra and then produce masks indicating the occurrence of hydrometeors (i.e.,… read more here.
Keywords: insects; velocity spectra; doppler velocity; radar ... See more keywords