Results 31 to 40 of about 69,955 (288)

Doppler spectra from DWD's operational C-band radar birdbath scan: sampling strategy, spectral postprocessing, and multimodal analysis for the retrieval of precipitation processes [PDF]

open access: yesAtmospheric Measurement Techniques, 2022
This study explores the potential of using Doppler (power) spectra from vertically pointing C-band radar birdbath scans to investigate precipitating clouds above the radar. First, the new birdbath scan strategy for the network of dual-polarization C-band
M. Gergely   +3 more
doaj   +1 more source

MIMO Radar Ambiguity Properties and Optimization Using Frequency-Hopping Waveforms [PDF]

open access: yes, 2008
The concept of multiple-input multiple-output (MIMO) radars has drawn considerable attention recently. Unlike the traditional single-input multiple-output (SIMO) radar which emits coherent waveforms to form a focused beam, the MIMO radar can transmit ...
Chen, Chun-Yang, Vaidyanathan, P. P.
core   +2 more sources

FDA-MIMO Radar Moving Target Detection Based on Doppler Spread Compensation

open access: yesLeida xuebao, 2022
When Frequency Diverse Array and Multiple-Input Multiple-Output (FDA-MIMO) radar detects moving targets, the frequency offset between transmitting arrays is coupled with the target velocity, resulting in severe Doppler spread in the slow time dimension ...
Shunsheng ZHANG, Meihui LIU, Wenqin WANG
doaj   +1 more source

Modification of reconstruction threshold algorithm in two-dimensional LFMCW compressive radar

open access: yesJournal of Electrical Systems and Information Technology, 2022
Nowadays, the Compressive Sensing theory has an important effect on many communication system’s performances, and one of these applications is the radar system.
Sameh Ghanem
doaj   +1 more source

Theory and observations of ice particle evolution in cirrus using Doppler radar: evidence for aggregation [PDF]

open access: yes, 2006
Vertically pointing Doppler radar has been used to study the evolution of ice particles as they sediment through a cirrus cloud. The measured Doppler fall speeds, together with radar-derived estimates for the altitude of cloud top, are used to estimate a
A. J. Illingworth   +27 more
core   +2 more sources

A new method for Synthetic Impulse and Aperture Radar transmitting waveform design based on non‐sequential positive, negative and random carrier frequency coding with dot product approach

open access: yesIET Radar, Sonar & Navigation, 2022
Synthetic Impulse and Aperture Radar (SIAR) is a kind of Multiple Input Multiple Output (MIMO) radar. It is a four‐dimensional radar that has advantages against stealth targets, multi targets, anti‐radiated missile, reconnaissance and interference, as ...
Pourya Yaghoubi Aliabad   +2 more
doaj   +1 more source

A Doppler Radar System for Sensing Physiological Parameters in Walking and Standing Positions

open access: yesSensors, 2017
Doppler radar can be implemented for sensing physiological parameters wirelessly at a distance. Detecting respiration rate, an important human body parameter, is essential in a range of applications like emergency and military healthcare environments ...
Malikeh Pour Ebrahim   +2 more
doaj   +1 more source

Imaging observations of nighttime mid-latitude F-region field-aligned irregularities by an MU radar ultra-multi-channel system [PDF]

open access: yesAnnales Geophysicae, 2008
Mid-latitude F-region field-aligned irregularities (FAIs) were studied by using the middle-and-upper atmosphere (MU) radar ultra-multi-channel system with the radar imaging technique.
S. Saito   +3 more
doaj   +1 more source

Micro-Doppler Parameters Extraction of Precession Cone-Shaped Targets Based on Rotating Antenna

open access: yesRemote 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
doaj   +1 more source

Empirical Analysis of Chirp and Multitones Performances with a UWB Software Defined Radar: Range, Distance and Doppler [PDF]

open access: yes, 2014
In this study, a protocol for an unbiased analysis of radar signals' performance. Using a novel UWB software-defined radar, range profile, Doppler profile and detection range are evaluated for both Linear Frequency Modulated pulse and Multitones.
Gray, Derek   +2 more
core   +1 more source

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