Results 41 to 50 of about 17,836 (241)

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

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

Counter-Interception and Counter-Exploitation Features of Noise Radar Technology

open access: yesRemote Sensing, 2021
In defense applications, the main features of radars are the Low Probability of Intercept (LPI) and the Low Probability of Exploitation (LPE). The counterpart uses more and more capable intercept receivers and signal processors thanks to the ongoing ...
Gaspare Galati   +3 more
doaj   +1 more source

Generation of pseudo-random sequences for noise radar applications [PDF]

open access: yes, 2014
Noise Radar Technology (NRT) is nowadays a promising tool in radar systems. It is based on the transmission of waveforms composed of many noisy samples, which behave as LPI (Low Probability of Intercept) and antispoofing signals.
De Palo, F, Galati, G, Pavan, G
core   +1 more source

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

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