Results 21 to 30 of about 2,823 (249)

Blind source separation communication anti-jamming technology and practice

open access: yesTongxin 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

Hierarchical coordinated anti-jamming channel access in clustering networks: a multi-leader multi-follower Stackelberg game approach

open access: yesEURASIP Journal on Advances in Signal Processing, 2021
This paper mainly investigates the multi-user coordinated anti-jamming problem in clustering communication networks. In such kinds of networks, there exist multiple clusters and multiple users who communicate with their receivers simultaneously. Besides,
Yifan Xu   +6 more
doaj   +1 more source

Anti-jamming performance of cognitive radio networks [PDF]

open access: yes2011 45th Annual Conference on Information Sciences and Systems, 2011
In this paper, we study both the jamming capability of the cognitive-radio-based jammers and the anti-jamming capability of the cognitive radio networks. We first setup the models of cognitive-radio-based jammers and the cognitive radio network transmissions.
Xiaohua Li 0003, Wednel Cadeau
openaire   +1 more source

A discounted‐UCB1‐tuned plus Q‐learning based anti‐jamming routing algorithm for wireless mesh networks

open access: yesElectronics Letters, 2023
To achieve autonomous anti‐jamming routing for wireless mesh networks (WMNs) under the threat of unknown removable jammers, a Q‐learning anti‐jamming routing algorithm using the improved upper‐confidence‐bound (UCB) algorithm is proposed in this paper ...
Huihui Ding   +4 more
doaj   +1 more source

Repeater jamming suppression method for pulse Doppler fuze based on identity recognition and chaotic encryption

open access: yesDefence Technology, 2021
Pulse Doppler (PD) fuze is widely used in current battlefield. However, with the threat of repeater jamming, especially digital radio frequency memory technology, the deficiency in the anti-repeater jamming of a traditional PD fuze increasingly emerges ...
Jian Dai   +4 more
doaj   +1 more source

Jamming Modulation: An Active Anti-Jamming Scheme

open access: yesIEEE Transactions on Wireless Communications, 2023
Providing quality communications under adversarial electronic attacks, e.g., broadband jamming attacks, is a challenging task. Unlike state-of-the-art approaches which treat jamming signals as destructive interference, this paper presents a novel active anti-jamming (AAJ) scheme for a jammed channel to enhance the communication quality between a ...
Jianhui Ma   +5 more
openaire   +3 more sources

Fast Reinforcement Learning for Anti-jamming Communications

open access: yesCoRR, 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   +2 more sources

CAWE-ACNN Algorithm for Coprime Sensor Array Adaptive Beamforming

open access: yesSensors
This paper presents a robust adaptive beamforming algorithm based on an attention convolutional neural network (ACNN) for coprime sensor arrays, named the CAWE-ACNN algorithm.
Fulai Liu   +5 more
doaj   +1 more source

Cumulative Social Disadvantage and Disease Activity in Juvenile Idiopathic Arthritis: A Childhood Arthritis and Rheumatology Research Alliance Registry Study

open access: yesArthritis Care &Research, EarlyView.
Objective Social determinants of health (SDOH) contribute to juvenile idiopathic arthritis (JIA) disparities, but most studies have assessed SDOH independently rather than cumulatively across individual, family, and neighborhood levels. Using a socioecological framework, we investigated the relationship among cumulative social disadvantage ...
William Daniel Soulsby   +448 more
wiley   +1 more source

A Real-Time Phase Center Variation Compensation Algorithm for the Anti-Jamming GNSS Antennas

open access: yesIEEE Access, 2020
The anti-jamming antenna is one of the most efficient ways to resist the adversary effect of the interference signal in GNSS positioning. Most anti-jamming antennas can adaptively adjust the radiation figure of the antenna to minimize the interference ...
Kejin Cao, Lei Wang, Bao Li, Hengchao Ma
doaj   +1 more source

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