Results 1 to 10 of about 18,711,084 (294)

Evidence-Theoretic Reentry Target Classification Using Radar: A Fuzzy Logic Approach

IEEE Access, 2021
This study focuses on the reentry target classification and fuses target features based on the generalized evidence theory. The features are extensively investigated, and the ballistic factor and length of the high-resolution range profile are selected ...
Kwangyong Jung, Sawon Min, Jeongwoo Kim, Nammoon Kim, Euntai Kim   +4 more
doaj   +1 more source

Weak moving target detection based on suprathreshold stochastic resonance in heavy‐tailed sea clutter

IET Radar, Sonar & Navigation, 2022
Detection of weak moving targets with a low signal‐to‐clutter ratio (SCR) in heavy‐tailed non‐Gaussian sea clutter is a challenge problem in radar signal processing.
Yujia Yan, Guangxin Wu, Yang Dong, Yuan Yao   +3 more
doaj   +1 more source

A Parametric-Model-Based Approach for Atmospheric Phase Screen Removal in Ground-Based Interferometric SAR

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
The atmosphere affects the propagation of radar signals by provoking unwanted signal phase changes. In interferometric applications, such as coherent change detection and displacement measurements, this effect may significantly degrade the system ...
Elisa Giusti, Samuele Gelli, Marco Martorella   +2 more
doaj   +1 more source

Derivation of a Universally Valid Array Factor of a Conformal Arrays Based on Phase Compensation and Genetic Learning Particle Swarm Optimization

Applied Sciences, 2022
In this study, we investigated the recent deterioration of the radiation pattern performance of conformal arrays, which are applied to fields such as aircraft and vehicles.
Jinsu Park, Hong Jun Lim, Son Trinh-Van, Daesung Park, Youn Kwon Jung, Dongju Lim, Keum Cheol Hwang   +6 more
doaj   +1 more source

A Modified Factorized Geometrical Autofocus Method for Wide Angle SAR

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
Wide-Angle (WA) synthetic aperture radar (SAR) has shown remarkable performance in high-resolution mapping, and its mostly used imaging algorithm, fast factorized back projection (FFBP), is efficient, robust, and of low computational complexity. However,
Han Li, Zhiyong Suo, Chengxin Zheng, Zhenfang Li, Bingji Zhao   +4 more
doaj   +1 more source

A Dual-Band Dual-Polarized Antenna with Improved Isolation Characteristics for Polarimetric SAR Applications

Applied Sciences, 2021
A dual-band dual-polarized antenna with high isolation characteristics is proposed for polarimetric synthetic aperture radar (PolSAR) applications. The antenna consists of four dipole antennas and 2 × 2 patch antenna arrays operating at the P-band (450 ...
Daesung Park, Jaehoon Choi
doaj   +1 more source

Baseline Estimation Using DEM Prior Knowledge and Capability Analysis for Gaofen-3 Repeat-Pass SAR Interferometry

IEEE Access, 2019
In this paper, the study on the digital elevation model (DEM) reconstruction using Gaofen-3 satellite repeat-pass synthetic aperture radar (SAR) interferometry is presented.
Lixiang Ma, Yue Wang, Qingjun Zhang, Yu Zhu, Yue Zhang, Mingming Bian   +5 more
doaj   +1 more source

Functional Architecture of Full Inertial Compensation for Beam Steering Command on Terrain-Following Mode Operation of Airborne AESA Radar [PDF]

Journal of Electromagnetic Engineering and Science
Active electronically scanned array (AESA) radars, which are usually a fighter jet, can operate in terrain-following (TF) mode to generate a terrain profile based on TF scan commands.
Dongju Lim, Yongmin Kim, Joongyoon Lee
doaj   +1 more source

Application of a Bayesian Network Based on Multi-Source Information Fusion in the Fault Diagnosis of a Radar Receiver

Sensors, 2022
A radar is an important part of an air defense and combat system. It is of great significance to military defense to improve the effectiveness of radar state monitoring and the accuracy of fault diagnosis during operation.
Boya Liu, Xiaowen Bi, Lijuan Gu, Jie Wei, Baozhong Liu   +4 more
doaj   +1 more source

Robust estimations of DOA and source number with strong and weak signals coexisting simultaneously based on a sparse uniform array

The Journal of Engineering, 2019
For the problem of the direction-of-arrival (DOA) and source number estimations with coexisting strong and weak signals, a new method for robust estimations of DOA and the number of sources based on an optimized broad band sparse array is proposed.
Qingyan Liu, Cao Zeng, Shidong Li, Zhiwei Yang, Guisheng Liao   +4 more
doaj   +1 more source