Results 31 to 40 of about 769,138 (291)

Noise Optimization for Artificial Neural Networks

, 2021
Se ha demostrado que la adición de ruidos a la red neuronal artificial (ANN) puede mejorar la solidez en trabajos anteriores. En este trabajo, proponemos una nueva técnica para calcular la estimación del gradiente estocástico Pathwise con respecto a la desviación estándar del ruido gaussiano añadido a cada neurona de la ANN.
Li Xiao, Zeliang Zhang, Yijie Peng
openaire   +2 more sources

Physical-Layer Security Enhancement for UAV Downlink Communication Using Joint Precoding and Artificial Noise Design in Generalized Spatial Directional Modulation

Drones
This paper proposes a novel joint precoding and artificial noise design framework for generalized spatial directional modulation (AN-GSDM) in unmanned aerial vehicle (UAV) communications, aimed at enhancing the physical-layer security of downlink UAV ...
Xianglu Li, Youyang Xiang, Jie Zhou, Ying Luo, Qilong Du, Dong Hou, Jie Tian   +6 more
doaj   +1 more source

On physical‐layer security for primary system in underlay cognitive radio networks

IET Networks, 2018
In this study, the authors consider the physical‐layer security for transmission in underlay cognitive radio networks, where consisting of a primary source–destination pair, a secondary transmitter–receiver pair and a common eavesdropper (E). To transmit
Ping Xie, Moli Zhang, Gaoyuan Zhang, Ruijuan Zheng, Ling Xing, Qingtao Wu   +5 more
doaj   +1 more source

Improving Secrecy for Correlated Main and Wiretap Channels Using Cooperative Jamming

IEEE Access, 2019
To reduce the secrecy loss due to the correlation between main and wiretap channels, this paper introduces a cooperative jamming relay to degrade the reception at the eavesdropper.
Sai Xu, Shuai Han, Weixiao Meng, Zhiqiang Li, Cheng Li, Chengwen Zhang   +5 more
doaj   +1 more source

GPI-Based Secrecy Rate Maximization Beamforming Scheme for Wireless Transmission With AN-Aided Directional Modulation

IEEE Access, 2018
In a directional modulation network, a general power iterative (GPI) based beamforming scheme is proposed to maximize the secrecy rate (SR), where there are two optimization variables required to be optimized. The first one is the useful precoding vector
Hai Yu, Simin Wan, Wenlong Cai, Ling Xu, Xiaobo Zhou, Jin Wang, Yongpeng Wu, Feng Shu, Jiangzhou Wang, Jianxin Wang   +9 more
doaj   +1 more source

Novel Noise Injection Scheme to Guarantee Zero Secrecy Outage under Imperfect CSI

Entropy, 2023
The paper proposes a novel artificial noise (AN) injection strategy in multiple-input single-output multiple-antenna-eavesdropper (MISOME) systems under imperfect channel estimation at the legitimate channel to achieve zero secrecy outage probability ...
Hien Q. Ta, Lam Cao, Hoon Oh
doaj   +1 more source

Acoustic Metasurface for Space‐time Reflection Manipulation

Advanced Science
Recently, space‐time modulation has revolutionized the wave engineering technologies, providing unprecedented opportunities beyond traditional static systems.
Yunhan Yang, Han Jia, Jiuyang Lu, Yuzhen Yang, Tuo Liu, Jun Yang, Zhengyou Liu   +6 more
doaj   +1 more source

Physical Layer Security using Time-Reversal Pre-Coding based OFDM-DCSK Communication System with Artificial Noise Injection

Journal of Communications Software and Systems, 2023
In this paper, Time-Reversal (TR) pre-coding with Artificial Noise (AN) injection is proposed to enhance the physical layer security (PLS) performance in orthogonal Frequency Division Multiplexing-Differential Chaos Shift Keying (OFDM-DCSK) system, which
Dhuha Hussein Hameed, Fadhil S. Hasan
doaj   +1 more source

Artificial Noise Injection for Securing Single-Antenna Systems

, 2017
We propose a novel artificial noise (AN) injection scheme for wireless systems over quasi-static fading channels, in which a single-antenna transmitter sends confidential messages to a half-duplex receiver in the presence of an eavesdropper.
He, Biao, Lau, Vincent K. N., She, Yechao   +2 more
core   +2 more sources

Secure Communications in Millimeter Wave Ad Hoc Networks [PDF]

, 2017
Wireless networks with directional antennas, like millimeter wave (mmWave) networks, have enhanced security. For a large-scale mmWave ad hoc network in which eavesdroppers are randomly located, however, eavesdroppers can still intercept the confidential ...
Heath Jr, Robert W., Wang, Lifeng, Wong, Kai-Kit, Zhu, Yongxu   +3 more
core   +2 more sources