Results 81 to 90 of about 2,705,955 (242)

LPI Sequences Optimization Method against Summation Detector Based on FFT Filter Bank

open access: yesRemote Sensing
Waveform design is a crucial factor in electronic surveillance (ES) systems. In this paper, we introduce an algorithm that designs a low probability of intercept (LPI) radar waveform. Our approach directly minimizes the detection probability of summation
Qiang Liu   +4 more
doaj   +1 more source

Multiple‐input multiple‐output with frequency diverse array radar transmit beamforming design for low‐probability‐of‐intercept in cluttered environments

open access: yesIET Signal Processing, 2022
Multiple‐input multiple‐output with frequency diverse array (FDA‐MIMO) radar has drawn great attention due to providing the range‐angle beampattern via designing the transmit beamforming matrix.
Panke Jiang   +3 more
doaj   +1 more source

The detection of unknown waveforms in ESM receivers: FFT-based real-time solutions [PDF]

open access: yes, 2011
Radars and airborne electronic support measures (ESMs) systems are locked in a tactical battle to detect each other whilst remaining undetected. Traditionally, the ESM system has a range advantage.
MacKerron, Graham Henry
core  

Structure and diversity patterns of coralligenous cliffs across three ecoregions in the Central‐Western Mediterranean Sea

open access: yesDiversity and Distributions, Volume 30, Issue 9, September 2024.
Abstract Aim Coralligenous reefs are the main marine bioconstructions in terms of spatial distribution within the Mediterranean basin. Two distinct reef morphologies can be distinguished based on the surface and topographical features of the seafloor: cliffs developing vertical slopes and banks found on gently steep or horizontal bottoms. Despite their
Edoardo Casoli   +21 more
wiley   +1 more source

Multi-ship cooperative air defense model based on queuing theory [PDF]

open access: yesarXiv, 2022
The study of the multi-ship air defense model is of great significance in the simulation and evaluation of the actual combat process, the demonstration of air defense tactics, and the improvement of the security of important targets. The traditional multi-ship air defense model does not consider the coordination between ships, and the model assumptions
arxiv  

Valuing Natural Space and Landscape Fragmentation in Richmond, VA [PDF]

open access: yes, 2016
Hedonic pricing methods and GIS (Geographic Information Systems) were used to evaluate relationships between sale price of single family homes and landscape fragmentation and natural land cover. Spatial regression analyses found that sale prices increase
Carpenter, Lee Wyatt
core   +1 more source

Power allocation between radar and jammer using conflict game theory

open access: yesElectronics Letters, Volume 60, Issue 16, August 2024.
This article introduces a novel utility function and a Conflict Power Allocation Game (CPAG) algorithm to analyze the countermeasure game dynamics between radar and jammer systems. By deriving optimal response functions using the utility function, the Nash Equilibrium (NE) solution of the game is calculated, demonstrating convergence of the CPAG ...
Bin He, Ning Yang
wiley   +1 more source

Extraction of the pulse width and pulse repetition period of linear FM radar signal using time-frequency analysis [PDF]

open access: yes, 2020
A common technique used by military to realize low probability of intercept (LPI) is linear frequency modulation (LFM) in the field of electronic intelligence (ELINT). This paper estimates the pulse width (PW) and the pulse repetition period (PRP) of LFM
Ahmad, Ashraf Adamu   +4 more
core   +2 more sources

Low Probability of Intercept Radar Signal Recognition Based on Semi-Supervised Support Vector Machine

open access: yesElectronics
Low probability of intercept (LPI) radar signal recognition under low signal-to-noise ratio (SNR) is a challenging task within electronic reconnaissance systems, particularly when faced with scarce labeled data and limited resources.
Fuhua Xu   +5 more
semanticscholar   +1 more source

Low probability of intercept-based distributed MIMO radar waveform design against barrage jamming in signal-dependent clutter and coloured noise

open access: yesIET Signal Processing, 2019
This study investigates the problem of low probability of intercept (LPI)-based distributed multiple-input multiple-output (MIMO) radar waveform design against barrage jamming in signal-dependent clutter and coloured noise.
C. Shi   +3 more
semanticscholar   +1 more source

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