Results 21 to 30 of about 1,161 (185)

LPI Optimization Framework for Radar Network Based on Minimum Mean-Square Error Estimation

Entropy, 2017
This paper presents a novel low probability of intercept (LPI) optimization framework in radar network by minimizing the Schleher intercept factor based on minimum mean-square error (MMSE) estimation.
Ji She, Jianjiang Zhou, Fei Wang, Hailin Li   +3 more
doaj   +1 more source

Analysis of Low Probability of Intercept Radar Signals Using the Reassignment Method [PDF]

American Journal of Engineering and Applied Sciences, 2015
Digital intercept receivers are currently moving towards classical time-frequency analysis techniques for analyzing low probability of intercept radar signals. Although these techniques are an improvement over existing Fourier-based techniques, they still suffer from a lack of readability, due to poor time-frequency localization and cross-term ...
Daniel L. Stevens, Stephanie A. Schuckers   +1 more
openaire   +1 more source

A fast Wigner Hough transform algorithm for parameter estimation of low probability of intercept radar polyphase coded signals

IET Signal Processing, 2023
It is difficult for a receiver to intercept the signals from a radar system that can emit low probability of intercept (LPI) polyphase coded signals. The traditional Wigner Hough transform (WHT) algorithm requires a large amount of computation and takes ...
Jincheng Yang, Shiwen Chen, Jinpeng Dong, Xiao Han   +3 more
doaj   +1 more source

Bearing estimation of low probability of intercept sources via polynomial matrices and sparse linear arrays

IET Radar, Sonar & Navigation, 2021
Recent years have seen a steady convergence of Radar and Communications band Radio Frequency (RF) transceiver systems. Not only have Communications systems colonised large swathes of previously allocated Radar bands but there is also a convergence of ...
William Coventry, Carmine Clemente, John Soraghan, Neil Cade   +3 more
doaj   +1 more source

Research on radar task scheduling with power constraint

The Journal of Engineering, 2019
Aiming at the task-scheduling problem of phased array radar subject to low probability of intercept (LPI), the radar radiation power constraint and power agility features are analysed.
Yong-Kun Wang, Shi-You Zheng
doaj   +1 more source

Mutual interference and low probability of interception capabilities of noise radar

IET Radar, Sonar & Navigation, 2008
Recently, there has been considerable interest in noise radar over a wide spectrum of applications, such as through-wall surveillance, tracking, Doppler estimation, polarimetry, interferometry, ground penetrating or subsurface profiling, detection, synthetic aperture radar (SAR) imaging, inverse SAR imaging, foliage penetration imaging etc.
T. Thayaparan, M. Daković, L. Stanković   +2 more
openaire   +1 more source

Deep learning-based LPI radar signals analysis and identification using a Nyquist Folding Receiver architecture

Defence Technology, 2023
Nyquist Folding Receiver (NYFR) is a perceptron structure that realizes a low probability of intercept (LPI) signal analog to information. Aiming at the problem of LPI radar signal receiving, the time domain, frequency domain, and time-frequency domain ...
Tao Wan, Kai-li Jiang, Hao Ji, Bin Tang
doaj   +1 more source

LPI Radar Detection Based on Deep Learning Approach with Periodic Autocorrelation Function

Sensors, 2023
In electronic warfare systems, detecting low-probability-of-intercept (LPI) radar signals poses a significant challenge due to the signal power being lower than the noise power.
Do-Hyun Park, Min-Wook Jeon, Da-Min Shin, Hyoung-Nam Kim   +3 more
doaj   +1 more source

Circulating Amino Acid Network Remodeling Reveals Systemic Metabolic Reprogramming Predictive of Colorectal Cancer Recurrence and Metastasis

Advanced Science, EarlyView.
Blood‐based amino acid patterns measured by 19F NMR reveal hidden metabolic changes in colorectal cancer. By analyzing how these amino acids interact as a network, machine learning models identify patients at higher risk of recurrence and metastasis.
Ji‐Yeon Lee, Jumi Kim, Taehan Yoon, So Hyun Kwon, Su Chan Park, Dohyun Chun, Dohyeong Kim, Eun Jung Park, Hyunwoo Kim, Ji Min Lee   +9 more
wiley   +1 more source

Interfacial Solvent Molecular Engineering via High‐Safety Dense Separators for High‐Rate Lithium‐Ion Batteries

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
The dense PPS‐separator prevents thermal runaway by allowing electron transfer through the steel needle during penetration, while the residual electrolyte enables brief ion migration and Joule heating, causing rapid electrolyte vaporization, collapse of the ion transport network, and a sharp drop in ionic conductivity.
Haitao Zhou, Jie Gu, Haiyun Zhou, Yihong Deng, Yafei Shi, Yang Yang, Chen Wang, Hongquan Gao, Jianchun Wu, Libo Wang, Xiangdong Huo   +10 more
wiley   +1 more source