Results 41 to 50 of about 779,702 (326)

Characterization of surface clutter signal in the presence of orography for a spaceborne conically scanning W-band Doppler radar [PDF]

open access: yesAtmospheric Measurement Techniques
The Earth's surface radar reflection is one of the most important signals received by spaceborne radar systems. It is used in several scientific applications, including geolocation, terrain classification, and path-integrated attenuation estimation.
F. Manconi   +4 more
doaj   +1 more source

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

Doppler Spectrum Estimation by Ramanujan Fourier Transforms [PDF]

open access: yes, 2009
The Doppler spectrum estimation of a weather radar signal in a classic way can be made by two methods, temporal one based in the autocorrelation of the successful signals, whereas the other one uses the estimation of the power spectral density PSD by ...
Bensebti, Messaoud, Lagha, Mohand
core   +4 more sources

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

Semisupervised Human Activity Recognition With Radar Micro-Doppler Signatures

open access: yesIEEE Transactions on Geoscience and Remote Sensing, 2021
Human activity recognition (HAR) plays a vital role in many applications, such as surveillance, in-home monitoring, and health care. Portable radar sensor has been increasingly used in HAR systems in combination with deep learning (DL).
Xinyu Li   +3 more
semanticscholar   +1 more source

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

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

Moving target detection in clutter background with FDA-MIMO radar via three-dimensional focus processing

open access: yesThe Journal of Engineering, 2019
Low observable moving target-detection technology under clutter background is the key factor affecting the radar performance. Here, frequency diverse array (FDA) MIMO radar is investigated for low-observable moving target detection.
Xiaolong Chen   +5 more
doaj   +1 more source

The relationship between VHF radar auroral backscatter amplitude and Doppler velocity: a statistical study [PDF]

open access: yesAnnales Geophysicae, 1996
A statistical investigation of the relationship between VHF radar auroral backscatter intensity and Doppler velocity has been undertaken with data collected from 8 years operation of the Wick site of the Sweden And Britain Radar-auroral Experiment ...
B. A. Shand, M. Lester, T. K. Yeoman
doaj   +1 more source

Home - About - Disclaimer - Privacy