Results 41 to 50 of about 2,448 (172)

Improving Signal Security of Secondary Surveillance RADAR by Using Direct Sequence Spread Spectrum Technology [PDF]

open access: yesعلوم 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

LPI Air Defence Noise Radar [PDF]

open access: yes, 2023
This dissertation is for researching the feasibility of a Low Probability of Intercept (LPI), Air Defence (AD) Noise Radar with high range and doppler resolution. The research is approached by first simulating an S-Band LPI Noise Radar detecting a flying
Molope, Lazarus Molahlegi
core   +1 more source

Research on radar task scheduling with power constraint

open access: yesThe 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

Low-PAPR Waveforms with Shaped Spectrum for Enhanced Low Probability of Intercept Noise Radars

open access: yesRemote Sensing, 2021
Noise radars employ random waveforms in their transmission as compared to traditional radars. Considered as enhanced Low Probability of Intercept (LPI) radars, they are resilient to interference and jamming and less vulnerable to adversarial exploitation
Kubilay Savci   +2 more
doaj   +1 more source

STELLAR ORIGINS OF EXTREMELY C-13- AND N-15-ENRICHED PRESOLAR SIC GRAINS: NOVAE OR SUPERNOVAE? [PDF]

open access: yes, 2016
Extreme excesses of 13C (12C/13C < 10) and 15N (14N/15N < 20) in rare presolar SiC grains have been considered diagnostic of an origin in classical novae, though an origin in core collapse supernovae (CCSNe) has also been proposed. We report C, N, and Si
Alexander, Conel M. O'D.   +9 more
core   +3 more sources

Low Probability of Intercept Communication Based on Structured Radio Beams Using Machine Learning

open access: yesIEEE 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 Improved Polar-Coordinate Navigation System with the Establishment of Electronic Counter-counter Measures Capabilities [PDF]

open access: yes, 2013
With easy-to-be-disposed architecture and premium navigation performances, polar-coordinate navigationsystem (PCNS) is still widely utilized by modern military navigation systems.
Zhang, Qiang
core   +2 more sources

Detectability models for multiple access low-probability-of-intercept networks [PDF]

open access: yes, 2007
Increased demands for communications in the tactical battlefield have driven the development of multiple access low-probability-of-intercept (LPT) networks. Most detectability studies of LPI networks focus on the individual links of the network, in which
Mills, Robert F., Prescott, Glenn Eugene
core   +1 more source

An Investigation of LPI Radar Waveforms Classification in RoF Channels

open access: yesIEEE 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

Energy-Delay Tradeoff and Dynamic Sleep Switching for Bluetooth-Like Body-Area Sensor Networks

open access: yes, 2012
Wireless technology enables novel approaches to healthcare, in particular the remote monitoring of vital signs and other parameters indicative of people's health.
Caire, Giuseppe   +2 more
core   +1 more source

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