Results 31 to 40 of about 17,683 (224)

Improved transmit beamforming design based on ADMM for low probability of intercept of FDA-MIMO radar

open access: yesTongxin xuebao, 2022
Considering the low probability of intercept problem that the signal-dependent interference and the target were located in the same angle, an improved transmit beamforming design based on the alternating direction method of multipliers (ADMM) was ...
Pengcheng GONG, Yuntao WU
doaj   +2 more sources

Time-frequency represetation of radar signals using Doppler-Lag block searching Wigner-Ville distribution [PDF]

open access: yes, 2018
Radar signals are time-varying signals where the signal parameters change over time. For these signals, Quadratic Time-Frequency Distribution (QTFD) offers advantages over classical spectrum estimation in terms of frequency and time resolution but it ...
Hamdi, Muhammad Noor Muhammad   +1 more
core   +3 more sources

Spatial Information-Theoretic Optimal LPI Radar Waveform Design

open access: yesEntropy, 2022
In this paper, the design of low probability of intercept (LPI) radar waveforms considers not only the performance of passive interception systems (PISs), but also radar detection and resolution performance. Waveform design is an important considerations
Jun Chen   +4 more
doaj   +1 more source

Rainfall frequency analysis for ungauged regions using remotely sensed precipitation information [PDF]

open access: yes, 2018
Rainfall frequency analysis, which is an important tool in hydrologic engineering, has been traditionally performed using information from gauge observations.
Faridzad, M   +4 more
core   +1 more source

Automatic LPI Radar Waveform Recognition Using CNN

open access: yesIEEE Access, 2018
Detecting and classifying the modulation scheme of the intercepted noisy low probability of intercept (LPI) radar signals in real time is a necessary survival technique required in the electronic warfare systems. Therefore, LPI radar waveform recognition
Seung-Hyun Kong   +3 more
doaj   +1 more source

Ensemble prediction for nowcasting with a convection-permitting model—I: description of the system and the impact of radar-derived surface precipitation rates [PDF]

open access: yes, 2010
A key strategy to improve the skill of quantitative predictions of precipitation, as well as hazardous weather such as severe thunderstorms and flash floods is to exploit the use of observations of convective activity (e.g. from radar).
Bloom S.   +31 more
core   +1 more source

Phenomenology of low probability of intercept synthetic aperture radar via Frank codes

open access: yesSPIE Proceedings, 2014
This paper investigates techniques for using low probability of intercept (LPI) modulation techniques for forming synthetic aperture radar (SAR) imagery. This analysis considers a specific waveform type based upon Frank codes in providing for the LPI capability via phase shift keying (PSK) modulation.
Romero, Ric A.   +2 more
openaire   +2 more sources

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

open access: yesEntropy, 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   +3 more
doaj   +1 more source

Radar sensor using low probability of interception SS-FH signals

open access: yesIEEE Aerospace and Electronic Systems Magazine, 2000
One of the best known weakness of radar sensors in defense and security applications is the necessity to radiate a signal, which can be detected by the target, so being possible (easy in fact) that the target is alerted about the presence of a radar before the radar is alerted about the presence of a target.
Burgos García, Mateo   +3 more
openaire   +2 more sources

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