Results 31 to 40 of about 356 (136)
Improving Signal Security of Secondary Surveillance RADAR by Using Direct Sequence Spread Spectrum Technology [PDF]
علوم و فنون نظامی, 2020 Secondary radars are important equipment in the aviation industry. The basis of this system is the use of the L-band Q&A system for aircraft identification.
Jafar Khalilpur, Mohammad Farahmand rad
doaj +1 more source
Low Probability of Intercept Communication Based on Structured Radio Beams Using Machine Learning
IEEE Access, 2019 A low probability of intercept (LPI) communication system based on structured radio beams using machine learning is proposed. Information symbols can be physically encrypted on the structured radio beam realized by superposition of plane spiral orbital ...
Jialiang Zhou +4 more
doaj +1 more source
An Investigation of LPI Radar Waveforms Classification in RoF Channels
IEEE Access, 2019 Intensive research has been developed to either design or classify low probability of intercept (LPI) radar signals. These types of signals are used in different sensitive electronic warfare applications such as electronic support, electronic attack, and
Turki Alrubeaan +5 more
doaj +1 more source
Experimental Demonstration of Quantum Low Probability of Intercept for Ultra-Secure Communication
, 2023 Secure communication systems utilize encryption with shared keys between the sender and receiver of the encrypted message. For added security, the encrypted message can be hidden within a significant amount of noise so that the eavesdropper could not ...
Heyes, Jane E.
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Land Use Influences on Freshwater Biodiversity
Global Ecology and Biogeography, Volume 35, Issue 4, April 2026.ABSTRACT Aim Land‐use change is a major driver of biodiversity loss, but most generalisations about its effects come from terrestrial ecosystems. Given the fundamental differences in spatial structure and community assembly processes between terrestrial and freshwater ecosystems, biodiversity responses to land‐use change may diverge.
Minghua Shen +4 more
wiley +1 more source
Analysis of low probability of intercept (LPI) radar signals using the Wigner Distribution [PDF]
, 2004 The parameters of Low Probability of Intercept (LPI) radar signals are hard to identify by using traditional periodogram signal processing techniques. Using the Wigner Distribution (WD), this thesis examines eight types of LPI radar signals.
Gau, Jen-Yu
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Usage of Costas arrays in Low Probability of Intercept radars
, 2015 Low Probability of Intercept (LPI) radars are used to detect targets at low distances by means of coded signals without being intercepted by hostile elements. Frequency Shift Keying (FSK) is one of the signal types used by LPI radars.
Erkan Afacan +3 more
core +1 more source
Remote Sensing, 2023 This paper studies a coalition game theoretic power allocation algorithm for multi-target detection in radar networks based on low probability of intercept (LPI).
Xiangrong Dai +3 more
doaj +1 more source
Water Resources Research, Volume 62, Issue 2, February 2026.Abstract Affordable autonomous soil sensors and IoT technology enable real‐time soil moisture monitoring, which offers opportunities for real‐time model calibration and irrigation optimization. We introduce an irrigation decision support system SWIM2 (Sensor Wielded Inverse Modeling of a Soil Water Irrigation Model), a digital twin that integrates ...
Marit G. A. Hendrickx +7 more
wiley +1 more source
Analysis of low probability of intercept (LPI) radar signals using cyclostationary processing [PDF]
, 2002 LPI radar is a class of radar systems possessing certain performance characteristics that make them nearly undetectable by today's digital intercept receivers. This presents a significant tactical problem in the battle space.
Lima, Antonio F.
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