Results 31 to 40 of about 173,592,777 (169)

LPI Optimization Framework for Target Tracking in Radar Network Architectures Using Information-Theoretic Criteria

open access: yesInternational Journal of Antennas and Propagation, 2014
Widely distributed radar network architectures can provide significant performance improvement for target detection and localization. For a fixed radar network, the achievable target detection performance may go beyond a predetermined threshold with full
Chenguang Shi   +3 more
doaj   +1 more source

Information-Theoretic Optimal Radar Waveform Selection With Multi-Sensor Cooperation for LPI Purpose

open access: yesIEEE Access, 2022
For the complex battlefield electromagnetic environment, low probability of interception (LPI) performance has become an indispensable ability for modern radars.
Jun Chen, Fei Wang, Jianjiang Zhou
doaj   +1 more source

Information divergence-based low probability of intercept waveform detection for multi-antenna intercept receivers

open access: yesThe Journal of Engineering, 2019
Based on the asymptotic spectral distribution of sample covariance matrix, a new low probability of interception (LPI) signal detection method for multi-antenna intercept receiver is proposed via reforming the noise sequence into a Wishart matrix.
Jun Chen   +3 more
doaj   +1 more source

LPI Radar Signals Modulation Recognition Based on ACDCA-ResNeXt

open access: yesIEEE Access, 2023
For low probability of intercept (LPI) radar waveform identification accuracy (ACC) problem at low Signal-to-Noise Ratios (SNRs), an approach based on time-frequency analysis (TFA) and Asymmetric Dilated Convolution Coordinate Attention Residual networks
Xudong Wang   +5 more
doaj   +1 more source

Efficient Radar-Target Assignment in Low Probability of Intercept Radar Networks: A Machine-Learning Approach

open access: yesIEEE Open Journal of the Communications Society, 2023
To achieve low probability of intercept (LPI) in radar networks for multiple target detection, it is necessary to find the optimal assignment of distributed radars to targets.
Hamid Amiriara   +2 more
doaj   +1 more source

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

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

Analysis of low probability of intercept (LPI) radar signals using cyclostationary processing [PDF]

open access: yes, 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.
core   +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

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

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