Results 41 to 50 of about 1,370,388 (368)

Chaotic modelling of sea clutter

Electronics Letters, 1992
In the letter we present calculations based on experimental radar data which confirm the chaotic nature of sea clutter. In particular, the results of the calculations show that the first Lyapunov exponent of sea clutter is indeed positive and around 0.015. Such a result is an inherent characteristic of a chaotic process.
He Nan, Haykin S.
openaire   +1 more source

Sea Clutter Suppression Method Based on Ocean Dynamics Using the WRF Model

Journal of Marine Science and Engineering
Sea clutter introduces a significant amount of non-target reflections in the echo signals received by radar, complicating target detection and identification.
Guigeng Li, Zhaoqiang Wei, Yujie Chen, Xiaoxia Meng, Hao Zhang   +4 more
doaj   +1 more source

Sea Clutter Spectral Parameters Prediction and Influence Factor Analysis Based on Deep Learning

Leida xuebao, 2023
Using Deep Neural Network (DNN) modeling technology, a prediction model of Doppler spectral parameters of sea clutter based on multiple measurement conditions is established based on measured data of sea clutter from shore-based radar under different ...
Yushi ZHANG, Xiaoyu LI, Jinpeng ZHANG, Xiaoyun XIA   +3 more
doaj   +1 more source

Bayesian statistical analysis of ground-clutter for the relative calibration of dual polarization weather radars [PDF]

, 2016
A new data processing methodology, based on the statistical analysis of ground-clutter echoes and aimed at investigating the stability of the weather radar relative calibration, is presented.
Falconi, MARTA TECLA, Marzano, FRANK SILVIO, Montopoli, Mario   +2 more
core   +1 more source

Sea Clutter Suppression Based on Chaotic Prediction Model by Combining the Generator and Long Short-Term Memory Networks

Remote Sensing
Sea clutter usually greatly affects the target detection and identification performance of marine surveillance radars. In order to reduce the impact of sea clutter, a novel sea clutter suppression method based on chaos prediction is proposed in this ...
Jindong Yu, Baojing Pan, Ze Yu, Hongling Zhu, Hanfu Li, Chao Li, Hezhi Sun   +6 more
doaj   +1 more source

Compound-Gaussian Model with Nakagami-Distributed Textures for High-Resolution Sea Clutter at Medium/High Grazing Angles

Remote Sensing
In this paper, a compound-Gaussian model (CGM) with the Nakagami-distributed textures (CGNG) is proposed to model sea clutter at medium/high grazing angles. The corresponding amplitude distributions are referred to as the CGNG distributions. The analysis
Guanbao Yang, Xiaojun Zhang, Pengjia Zou, P. Shui   +3 more
semanticscholar   +1 more source

A Network of Portable, Low-Cost, X-Band Radars [PDF]

, 2012
Radar is a unique tool to get an overview on the weather situation, given its high spatio- temporal resolution. Over 60 years, researchers have been investigating ways for obtaining the best use of radar.
Allegretti, Marco, Bertoldo, Silvano, Gabella, Marco, Lucianaz, Claudio, Notarpietro, Riccardo, Perona, Giovanni Emilio, Prato, Andrea, Rorato, Oscar   +7 more
core   +2 more sources

Space-time Characteristics and Experimental Analysis of Broadening First-order Sea Clutter in HF Hybrid Sky-surface Wave Radar [PDF]

, 2014
In high frequency (HF) hybrid sky-surface wave radar, the first-order sea clutter broadening is very complex and serious under the influence of ionosphere and bistatic angle, which affects the detection of ship target.
Chu, T.Q., Li, Y.J., Wang, Z.Q., Wei, Y.S., Xu, R.Q.   +4 more
core   +1 more source

Recent Advances in Collective Behaviors of Micro/Nanomotor Swarms

Advanced Materials, EarlyView.
This review describes the driving forces behind collective motion, explores the self‐organization of micro/nano swarms across zero‐dimensional (0D), one‐dimensional (1D), two‐dimensional (2D), and three‐dimensional (3D) spaces, and highlights their potential in drug delivery, environmental monitoring, and smart devices.
Siwen Sun, Bingbing Sun, Alexander B. Cook, Tania Patiño Padial, Jan C. M. van Hest   +4 more
wiley   +1 more source

Analysis of amplitude statistical and correlation characteristics of high grazing angle sea-clutter

The Journal of Engineering, 2019
Research on the characteristics of sea clutter has always been the focus in the problem of sea target detection as an indispensable part. In recent years, the problem of sea clutter characteristics under medium-high grazing angle is also paid more and ...
Heng-Yan Liu, Jie Song, Wei Xiong, Ya-Qi Cui, Ya-Fei Lv, Jun Liu   +5 more
doaj   +1 more source