Results 1 to 10 of about 113,924 (163)

Parameter Estimation for Interrupted Sampling Repeater Jamming Based on ADMM

open access: yesSensors, 2021
By repeatedly sampling, storing, and retransmitting parts of the radar signal, interrupted sampling repeater jamming (ISRJ) based on digital radio frequency memory (DRFM) can produce a train of secondary false targets symmetrical to the main false target,
Chaoyu Wang   +4 more
doaj   +1 more source

Reconfigurable integrated structures with functions of Fabry–Perot antenna and wideband liquid absorber for radar system stealth

open access: yesScientific Reports, 2023
This paper proposes a functionally reconfigurable integrated structure of a Fabry–Perot (FP) antenna and wideband liquid absorber. First, a two-layer partial reflecting surface (PRS) has been designed.
Yukun Zou   +4 more
doaj   +1 more source

Frequency-Scaling-Based Spaceborne Squint SAR Sparse Imaging

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
In synthetic aperture radar (SAR), due to the characteristics of squint data in spaceborne imaging geometry, a more accurate range cell migration correction operation is necessary.
Yufan Song   +4 more
doaj   +1 more source

Slow-Time Code Design for Space-Time Adaptive Processing in Airborne Radar

open access: yesEntropy, 2021
Space-time adaptive processing (STAP) techniques have been motivated as a key enabling technology for advanced airborne radar applications. In this paper, a slow-time code design is considered for the STAP technique in airborne radar, and the principle ...
Shiyi Li   +4 more
doaj   +1 more source

Target Recognition in SAR Images by Deep Learning with Training Data Augmentation

open access: yesSensors, 2023
Mass production of high-quality synthetic SAR training imagery is essential for boosting the performance of deep-learning (DL)-based SAR automatic target recognition (ATR) algorithms in an open-world environment.
Zhe Geng   +5 more
doaj   +1 more source

Broadband Image-Reject Mixing Based on a Polarization-Modulated Dual-Channel Photonic Microwave Phase Shifter

open access: yesIEEE Photonics Journal, 2020
Broadband image-reject mixing using a dual-channel polarization-modulated photonic microwave phase shifter is proposed and experimentally demonstrated.
Yamei Zhang   +6 more
doaj   +1 more source

Hybrid Attention-Based Encoder–Decoder Fully Convolutional Network for PolSAR Image Classification

open access: yesRemote Sensing, 2023
Recently, methods based on convolutional neural networks (CNNs) achieve superior performance in polarimetric synthetic aperture radar (PolSAR) image classification.
Zheng Fang   +4 more
doaj   +1 more source

Radar Imaging with EISCAT 3D [PDF]

open access: yesAnnales Geophysicae, 2020
Abstract. A new incoherent scatter radar called EISCAT 3D is being constructed in Northern Scandinavia. It will have the capability of producing volumetric images of ionospheric plasma parameters using aperture synthesis radar imaging. This study uses the current design of EISCAT 3D to explore the theoretical radar imaging performance and compares ...
Johann Stamm   +4 more
openaire   +4 more sources

A Maximum-Information-Minimum-Redundancy-Based Feature Fusion Framework for Ship Classification in Moderate-Resolution SAR Image

open access: yesSensors, 2021
High-resolution synthetic aperture radar (SAR) images are mostly used in the current field of ship classification, but in practical applications, moderate-resolution SAR images that can offer wider swath are more suitable for maritime surveillance.
Gaoyu Zhou, Gong Zhang, Biao Xue
doaj   +1 more source

An integrated single-shot spectrometer with large bandwidth-resolution ratio and wide operation temperature range

open access: yesPhotoniX, 2023
There has been a rapidly growing demand for low-cost, integrated single-shot spectrometers to be embedded in portable intelligent devices. Even though significant progress has been made in this area, two major problems are still remaining, namely the ...
Ang Li   +6 more
doaj   +1 more source

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