Results 21 to 30 of about 1,285 (251)
A cross‐layer anti‐jamming method in satellite Internet
IET Communications, 2023 In view of the diverse jamming environment, the single‐level anti‐jamming method faces some challenges such as poor timeliness, high cost and poor effect.
Peijie Yan +3 more
doaj +1 more source
Fast Reinforcement Learning for Anti-jamming Communications
CoRR, 2020 This letter presents a fast reinforcement learning algorithm for anti-jamming communications which chooses previous action with probability $τ$ and applies $ε$-greedy with probability $(1-τ)$. A dynamic threshold based on the average value of previous several actions is designed and probability $τ$ is formulated as a Gaussian-like function to guide the
Pei-Gen Ye +3 more
openaire +3 more sources
Blind source separation communication anti-jamming technology and practice
Tongxin xuebao, 2023 Aiming at the threat of broad frequency band suppressing jamming and the inherent contradiction between spectrum resources and communication anti-jamming ability, a method was proposed to add the statistics domain dimension on the basis of spread ...
Fuqiang YAO +3 more
doaj +2 more sources
Research on Intelligent anti-jamming communication with Cognitive Radio [PDF]
EAI Endorsed Transactions on Cognitive Communications, 2019 In order to solve the interfere problem in complex electromagnetic environment, NC-OFDM and TDCS are efficient transmit wave form proposed for cognitive radio. The spectral efficiency and the applicable environment of TDCS are different from NC-OFDM.
Jingning Wang, Meng Liu, Yi Zhang
openaire +3 more sources
Mode Hopping for Anti-Jamming in Radio Vortex Wireless Communications [PDF]
IEEE Transactions on Vehicular Technology, 2018 Frequency hopping (FH) has been widely used as a powerful technique for antijamming in wireless communications. However, as the wireless spectrum is becoming more and more crowded, it is very difficult to achieve efficient antijamming results with FH-based schemes.
Liping Liang +3 more
openaire +4 more sources
Anti-Jamming Communications in UAV Swarms: A Reinforcement Learning Approach [PDF]
IEEE Access, 2019 Intelligent unmanned aerial vehicle (UAV) swarm may accomplish complex tasks through cooperation, relying on inter-UAV communications. This paper aims to improve the communication performance of intelligent UAV swarm system in the presence of jamming, by multi-parameter programming and reinforcement learning. This paper considers a communication system,
Jinlin Peng +3 more
openaire +2 more sources
Anti-Jamming RIS Communications Using DQN-Based Algorithm
IEEE Access, 2022 Wireless sensor networks (WSNs) are widely applied in battlefield surveillance, where the data collection (e.g. target tracking or contention zone observation) employed by local sensor nodes needs to send to military bases for tactical decisions. Since data transmissions are susceptible to malicious attacks, jammers of adversaries can successfully ...
Pham-Duy Thanh +2 more
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Cobalt‐Catalyzed C─N Bond Formation via Metal‐Hydride Hydrogen Atom Transfer (MHAT)
Angewandte Chemie, EarlyView.Cobalt‐catalyzed metal‐hydride hydrogen atom transfer (Co‐MHAT) converts simple alkenes into C─N bonds under mild, near‐neutral conditions. A shared Co─H‐initiated radical/organocobalt intermediate is channeled into radical trapping, radical‐polar crossover, or radical ligand transfer, unifying hydroamination, hydroazidation, hydroamidation, and remote
Arman Khosravi, Ming‐Yu Ngai
wiley +2 more sources
Integrated Sensing and Communication for Anti-Jamming With OAM
IEEE Transactions on Wireless CommunicationsThe spectrum share and open nature of wireless channels enable integrated sensing and communication (ISAC) susceptible to hostile jamming attacks. Due to the intrinsic orthogonality and rich azimuth angle information of orbital angular momentum (OAM), vortex electromagnetic waves with helical phase fronts have shown great potential to achieve high ...
Liping Liang +3 more
openaire +3 more sources
Advanced Materials, EarlyView.This study presents the first demonstration of stable sub‐50‐micron single‐cell GPM vesicles fabricated through the intrinsic self‐assembly of an amphiphilic copolymer. Hierarchical assembly of cell containing GPM vesicles into microspheres enable tunable, sustained cell delivery with immune protection.
Viola B. Morris +11 more
wiley +1 more source