Results 41 to 50 of about 774,525 (334)

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

A light‐triggered Time‐Resolved X‐ray Solution Scattering (TR‐XSS) workflow with application to protein conformational dynamics

FEBS Open Bio, EarlyView.
Time‐resolved X‐ray solution scattering captures how proteins change shape in real time under near‐native conditions. This article presents a practical workflow for light‐triggered TR‐XSS experiments, from data collection to structural refinement. Using a calcium‐transporting membrane protein as an example, the approach can be broadly applied to study ...
Fatemeh Sabzian‐Molaei, Fredrik Orädd, Konstantinos Magkakis, Magnus Andersson   +3 more
wiley   +1 more source

Artificial-Noise-Aided Physical Layer Phase Challenge-Response Authentication for Practical OFDM Transmission

, 2016
Recently, we have developed a PHYsical layer Phase Challenge-Response Authentication Scheme (PHY-PCRAS) for independent multicarrier transmission. In this paper, we make a further step by proposing a novel artificial-noise-aided PHY-PCRAS (ANA-PHY-PCRAS)
Ling, Cong, Wu, Xiaofu, Xia, Xiang-Gen, Yan, Zhen   +3 more
core   +1 more source

Enhancing the significance of gravitational wave bursts through signal classification [PDF]

, 2017
The quest to observe gravitational waves challenges our ability to discriminate signals from detector noise. This issue is especially relevant for transient gravitational waves searches with a robust eyes wide open approach, the so called all- sky burst ...
Drago, M., Klimenko, S., Lazzaro, C., Necula, V., Prodi, G. A., Salemi, F., Tiwari, V., Tringali, M. C., Vedovato, G., Vinciguerra, S.   +9 more
core   +3 more sources

Secure MISO-NOMA Transmission With Artificial Noise [PDF]

IEEE Transactions on Vehicular Technology, 2018
This correspondence studies a new secrecy beamforming (SBF) scheme for multiple-input single-output non-orthogonal multiple access (MISO-NOMA) systems. In particular, the proposed SBF scheme efficiently exploits artificial noise to protect the confidential information of two NOMA assisted legitimate users, such that only the eavesdropper's channel is ...
Lu Lv, Zhiguo Ding, Qiang Ni, Jian Chen
openaire   +2 more sources

Analysing the significance of small conformational changes and low occupancy states in serial crystallographic data

FEBS Open Bio, EarlyView.
This protocol paper outlines methods to establish the success of a time‐resolved serial crystallographic experiment, by means of statistical analysis of timepoint data in reciprocal space and models in real space. We show how to amplify the signal from excited states to visualise structural changes in successful experiments.
Jake Hill, Yelyzaveta Pulnova, Elke De Zitter, Helen M. Ginn, Briony A. Yorke   +4 more
wiley   +1 more source

Artificial Noise-Aided Physical Layer Security in Underlay Cognitive Massive MIMO Systems with Pilot Contamination

Entropy, 2017
In this paper, a secure communication model for cognitive multi-user massive multiple-input multiple-output (MIMO) systems with underlay spectrum sharing is investigated.
Hayder Al-Hraishawi, Gayan Amarasuriya Aruma Baduge, Rafael F. Schaefer   +2 more
doaj   +1 more source

Enhancing Secrecy with Multi-Antenna Transmission in Wireless Ad Hoc Networks

, 2013
We study physical-layer security in wireless ad hoc networks and investigate two types of multi-antenna transmission schemes for providing secrecy enhancements.
McKay, Matthew R., Zhang, Xi, Zhou, Xiangyun   +2 more
core   +2 more sources