Results 1 to 10 of about 19,336 (112)

Sparse Antenna Array Based Positional Modulation Design With a Low-Complexity Metasurface

IEEE Access, 2020
Positional modulation (PM) has been introduced recently where a given modulation pattern can only be received at certain desired positions. To achieve it, the multi-path effect is exploited for positional modulation with the aid of metasurface acting as ...
Bo Zhang, Wei Liu, Jingxiao Ma, Zichen Qi, Junwei Zhang, Liang Han, Yang Li, Xiaonan Zhao, Cuiping Zhang, Cheng Wang   +9 more
doaj   +3 more sources

Metasurface Based Positional Modulation Design

IEEE Access, 2020
Directional modulation (DM) can transmit information to the desired direction or directions with known constellation mappings, but with scrambled ones in other directions.
Bo Zhang, Wei Liu, Qiang Li, Yang Li, Xiaonan Zhao, Cuiping Zhang, Cheng Wang   +6 more
doaj   +3 more sources

Five-Dimensional Positional Modulation with Quench-Trapped Modulation Phase in Solid-state Electrolyte Network Solid [PDF]

Structural Dynamics
Here we report on an interpenetrated network solid:(Adpn)3Zn(BF4)2 which exhibits multiple crystallographically modulated phases; one of which is only accessible by quench-trapping.
M. Brody Mistrot, Michael J. Zdilla
doaj   +2 more sources

Holistic Fusion of Fragmented Signal Features for Automatic Modulation Recognition via an Adaptive Topological Network [PDF]

Sensors
Automatic modulation recognition (AMR) remains challenging under low-signal-to-noise ratio (SNR) conditions, where severe noise can obscure weak modulation-specific waveform patterns. To address this issue, this paper proposes an Adaptive Holistic Fusion
Xiang Liu, Yachao Li, Qi Wang, Yanhong Guo, Chunyu Zhu, Ning Zhang   +5 more
doaj   +2 more sources

Constant Reflection Attenuation Constraint for Incoming Signals on Metasurface in Positional Modulation Design

IEEE Access, 2020
Metasurface based positional modulation design has been introduced recently, where a given modulation pattern can only be received at certain desired positions by the proposed method.
Bin Liang, Jun Shi, Bo Zhang
doaj   +3 more sources

Positional Modulation Design Based on Multiple Phased Antenna Arrays

IEEE Access, 2019
Traditional directional modulation designs are normally based on a single phased array, with the assumption that eavesdroppers and desired users are in different directions.
Bo Zhang, Wei Liu
doaj   +3 more sources

Assessment of Nocturnal Autonomic Cardiac Imbalance in Positional Obstructive Sleep Apnea. A Multiscale Nonlinear Approach

Entropy, 2020
Positional obstructive sleep apnea (POSA) is a major phenotype of sleep apnea. Supine-predominant positional patients are frequently characterized by milder symptoms and less comorbidity due to a lower age, body mass index, and overall apnea-hypopnea ...
Daniel Álvarez, C. Ainhoa Arroyo, Julio F. de Frutos, Andrea Crespo, Ana Cerezo-Hernández, Gonzalo C. Gutiérrez-Tobal, Fernando Vaquerizo-Villar, Verónica Barroso-García, Fernando Moreno, Tomás Ruiz, Roberto Hornero, Félix del Campo   +11 more
doaj   +3 more sources

Coordinate aware implicit neural representation for UAV small object detection. [PDF]

PLoS ONE
Small object detection in unmanned aerial vehicle (UAV) imagery remains challenging due to low resolution, complex backgrounds, and limited pixel occupancy. Conventional CNN-based detectors rely on fixed receptive fields, which often fail to capture fine-
Yong Yang, Tianci Wan, Ling Guo, Menglu Zhang   +3 more
doaj   +2 more sources

The role of character positional frequency on Chinese word learning during natural reading.

PLoS ONE, 2017
Readers' eye movements were recorded to examine the role of character positional frequency on Chinese lexical acquisition during reading and its possible modulation by word spacing.
Feifei Liang, Hazel I Blythe, Xuejun Bai, Guoli Yan, Xin Li, Chuanli Zang, Simon P Liversedge   +6 more
doaj   +1 more source

Incommensurate antiferromagnetic order in CePtAl_{3}

Physical Review Research, 2023
We report on a neutron diffraction study of single-crystal CePtAl_{3} complemented by measurements of the specific heat under applied magnetic field. Below T_{N}≈3 K, CePtAl_{3} develops incommensurate antiferromagnetic order with a single modulation ...
M. Stekiel, P. Čermák, C. Franz, W. Simeth, S. Weber, E. Ressouche, W. Schmidt, K. Nemkovski, H. Deng, A. Bauer, C. Pfleiderer, A. Schneidewind   +11 more
doaj   +1 more source