Results 1 to 10 of about 916,478 (249)

Incoherent Integration Detection Method of Airborne Phased Array Radar in a Multipath Environment

open access: yesInternational Journal of Antennas and Propagation, 2021
Airborne phased array radar (PAR) suffers from multipath problems when flying over a calm sea surface. The existence of a multipath phenomenon will cause the electromagnetic echo of the same target to be reflected back to the airborne PAR from two paths,
Yili Hu, Yongbo Zhao, Sheng Chen
doaj   +1 more source

Three-Dimensional Coordinate Extraction Based on Radargrammetry for Single-Channel Curvilinear SAR System

open access: yesRemote Sensing, 2022
With the rapid development of high-resolution synthetic aperture radar (SAR) systems, the technique that utilizes multiple two-dimensional (2-D) SAR images with different view angles to extract three-dimensional (3-D) coordinates of targets has gained ...
Chenghao Jiang   +6 more
doaj   +1 more source

A study on parameter estimation and suppression for smeared spectrum jamming based on short-time Fourier transform

open access: yesEURASIP Journal on Wireless Communications and Networking, 2020
We address the suppressing problem of smeared spectrum (SMSP) jamming from the mixed signal received by the radar. To this end, we resort to the time-frequency analysis algorithm and give the concrete expression formula of the short-time Fourier ...
Chuanzhang Wu   +3 more
doaj   +1 more source

The Laplacian spread of a tree [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2008
Graphs and ...
Yi-Zheng Fan   +3 more
doaj   +1 more source

Chaff identification method based on Range‐Doppler imaging feature

open access: yesIET Radar, Sonar & Navigation, 2022
Chaff is widely used in electronic countermeasures as an effective passive jamming method. This study proposes a chaff identification method that integrates the distribution of distance, Doppler frequency, and power in Range‐Doppler imaging.
Husheng Wang   +8 more
doaj   +1 more source

Airborne Elevation DBF-TOPS SAR/InSAR Method Based on LOS Motion Compensation and Channel Error Equalization

open access: yesRemote Sensing, 2022
Digital beamforming (DBF) TOPS SAR in elevation is a new synthetic aperture radar (SAR) system, which has the advantage of wide swath coverage and a high signal-to-noise ratio (SNR).
Zhiyong Suo   +5 more
doaj   +1 more source

Two-Stream Deep Fusion Network Based on VAE and CNN for Synthetic Aperture Radar Target Recognition

open access: yesRemote Sensing, 2021
Usually radar target recognition methods only use a single type of high-resolution radar signal, e.g., high-resolution range profile (HRRP) or synthetic aperture radar (SAR) images. In fact, in the SAR imaging procedure, we can simultaneously obtain both
Lan Du   +5 more
doaj   +1 more source

Convolutional neural networks for radar HRRP target recognition and rejection

open access: yesEURASIP Journal on Advances in Signal Processing, 2019
Robust and efficient feature extraction is critical for high-resolution range profile (HRRP)-based radar automatic target recognition (RATR). In order to explore the correlation between range cells and extract the structured discriminative features in ...
Jinwei Wan   +4 more
doaj   +1 more source

Aircraft Target Classification Based on Correlation Features from Time-domain Echoes

open access: yesLeida xuebao, 2015
This paper reports the classification of helicopters, propeller-driven aircraft, and turbojet based on differences in their time-domain modulation periods using a conventional radar system.
Du Lan   +4 more
doaj   +1 more source

Intelligent Radar Jamming Recognition in Open Set Environment Based on Deep Learning Networks

open access: yesRemote Sensing, 2022
Jamming recognition is an essential step in radar detection and anti-jamming in the complex electromagnetic environment. When radars detect an unknown type of jamming that does not occur in the training set, the existing radar jamming recognition ...
Yu Zhou   +5 more
doaj   +1 more source

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