Results 1 to 10 of about 805,540 (271)

Quantitative Prediction of Sea Clutter Power Based on Improved Grey Markov Model

Atmosphere, 2022
The detection and prediction of sea clutter power is the basis of inversing atmospheric duct. At present, the technology of atmospheric duct within radar detection range is relatively perfect, but the long-distance inversion of atmospheric duct is ...
Zihao Chen, Bin Tian, Siyun Zhang, Quanjun Xu   +3 more
doaj   +2 more sources

Analysis of the Atmospheric Duct Existence Factors in Tropical Cyclones Based on the SHAP Interpretation of Extreme Gradient Boosting Predictions

Remote Sensing, 2022
The atmospheric duct (AD) is an anomalous structure in which electromagnetic waves can make transhorizon propagation. ADs often occur in the formation, development and disappearance of tropical cyclones (TCs). In this work, the eXtreme Gradient Boosting (
Lang Huang, Xiaofeng Zhao, Yudi Liu, Pinglv Yang   +3 more
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Analysis and testing on the interference due to atmospheric duct of 5G

Dianxin kexue, 2022
Abstact: 5G (time division duplexing, TDD) system will be effected by the interference from 5G system due to atmospheric duct.The risk and current situation of 5G system in 2.6 GHz band were introduced and the interference characteristics of 5G ...
Xingang SONG, Xingzheng LI, Zhimin ZHAO, Yan WANG   +3 more
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Analysis and avoidance method of 5G atmospheric duct interference

Dianxin kexue, 2022
Atmospheric duct effects can produce the remote interference, which will lead to serious problems of the network degradation.Firstly, a detailed analysis of the causes of 5G atmospheric duct interference was achieved through the system principle analysis.
Tinglan WANG, Xingzheng LI, Yimin ZUO, Dongchen ZHANG   +3 more
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A Sliced Parabolic Equation Method to Characterize Maritime Radio Propagation

Sensors, 2023
For maritime broadband communications, atmospheric ducts can enable beyond line-of-sight communications or cause severe interference. Due to the strong spatial–temporal variability of atmospheric conditions in near-shore areas, atmospheric ducts have ...
Yuzhen Wang, Ting Zhou, Tianheng Xu, Honglin Hu   +3 more
doaj   +1 more source

Research on characteristic model-based atmospheric duct interference control in TDD wireless communication system

Dianxin kexue, 2022
Atmospheric duct interference is a seriousinternal interference of large-scale TDD wireless communication system according to specific meteorological conditions.The causes and classification of the atmospheric duct interference were analyzed firstly.Then
Xiaoyun WANG, Wei DENG, Long ZHANG, Xin SU, Shizhuo ZHAO   +4 more
doaj   +2 more sources

A Two-Way Split-Step Wavelet Scheme for Tropospheric Long-Range Propagation in Various Environments

Remote Sensing, 2022
In the context of improving the dimensioning of observation and telecommunication, the characterization of the propagation canal is very important. Thus, accurate models of propagation phenomenona in their environment and above a rough surface (maritime ...
Thomas Bonnafont, Othmane Benhmammouch, Ali Khenchaf   +2 more
doaj   +1 more source

Using Multi-Source Real Landform Data to Predict and Analyze Intercity Remote Interference of 5G Communication with Ducting and Troposcatter Effects

Remote Sensing, 2022
At present, 5G base stations are densely distributed in major cities based on improving user concentrations and the large demand for services in urban hotspot areas.
Kai Yang, Xing Guo, Zhensen Wu, Jiaji Wu, Tao Wu, Kun Zhao, Tan Qu, Longxiang Linghu   +7 more
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Multiscale Decomposition Prediction of Propagation Loss in Oceanic Tropospheric Ducts

Remote Sensing, 2021
The oceanic tropospheric duct is a structure with an abnormal atmospheric refractive index. This structure severely affects the remote sensing detection capability of electromagnetic systems designed for an environment with normal atmospheric refraction.
Mingxia Dang, Jiaji Wu, Shengcheng Cui, Xing Guo, Yunhua Cao, Heli Wei, Zhensen Wu   +6 more
doaj   +1 more source

Joint Inversion of Atmospheric Refractivity Profile Based on Ground-Based GPS Phase Delay and Propagation Loss

Atmosphere, 2016
In this paper, we present a new estimation of the atmospheric refractivity profile combining the scattering signal (electromagnetic wave propagation loss) and the direct signal (phase delay). The refractivity profile is modeled using four parameters, i.e.
Qixiang Liao, Zheng Sheng, Hanqing Shi
doaj   +1 more source