Results 21 to 30 of about 1,040 (238)

Impact of Hardware Impairment on the Uplink SIMO Cooperative NOMA With Selection Relay Under Imperfect CSI

IEEE Access, 2023
Non-orthogonal multiple access (NOMA) has emerged as a promising solution for enabling massive connectivity in future wireless networks. A great deal of research has extensively considered the implementation of the NOMA with other technologies such as ...
Safia Beddiaf, Abdellatif Khelil, Faical Khennoufa, Ferdi Kara, Khaled Rabie, Xingwang Li, Hakan Kaya, Ahmet Emir, Halim Yanikomeroglu   +8 more
doaj   +1 more source

Robust Null Broadening Beamforming Based on Covariance Matrix Reconstruction via Virtual Interference Sources

Sensors, 2020
When jammers move rapidly or an antenna platform travels at high speed, interference signals may move out of the null width in the array beampattern. Consequently, the interference suppression performance can be significantly degraded.
Jian Yang, Jian Lu, Xinxin Liu, Guisheng Liao   +3 more
doaj   +1 more source

Successive Decode-and-Forward Relaying With Privacy-Aware Interference Suppression

IEEE Access, 2020
Successive relaying holds the promise of achieving spatial diversity gain for single-antenna users while recovering the multiplexing loss due to the half-duplex relaying in B5G/6G.
Jianjing Wei, Jie Wei, Shaoling Hu, Wei Chen   +3 more
doaj   +1 more source

Achievable Degrees of Freedom for the Two-Cell Two-Hop MIMO Interference Channel With Half-Duplex Relays

IEEE Access, 2017
We consider the two-cell two-hop multiple-input-multiple-output interference channel with half-duplex relays, where each source group having M single antenna users communicates with the corresponding destination with M antennas via two relays, each ...
Jin Jin, Xiang-Chuan Gao, Xingwang Li, Shuangzhi Li, Zhongyong Wang   +4 more
doaj   +1 more source

Computationally Efficient Blind Source Separation-Based MIMO-PA Linearization

IEEE Access
This paper presents a Cross-Interference Reduction Digital predistortion (CIR-DPD) for a multiple-input and multiple-output (MIMO) system. The proposed method cancels the detrimental effect of crosstalk due to different MIMO branches and the antenna ...
Shipra, Meenakshi Rawat
doaj   +1 more source

Functional Materials for Environmental Energy Harvesting in Smart Agriculture via Triboelectric Nanogenerators

Advanced Functional Materials, EarlyView.
This review explores functional and responsive materials for triboelectric nanogenerators (TENGs) in sustainable smart agriculture. It examines how particulate contamination and dirt affect charge transfer and efficiency. Environmental challenges and strategies to enhance durability and responsiveness are outlined, including active functional layers ...
Rafael R. A. Silva, Giulio Fatti, Emanuel Carlos, Guilherme Ferreira, Sumita Goswami, Suman Nandy, Luiz H. C. Mattoso, Elvira Fortunato, Caio G. Otoni, Rodrigo Martins   +9 more
wiley   +1 more source

Rate-splitting multiple access for downlink communication systems: bridging, generalizing, and outperforming SDMA and NOMA

EURASIP Journal on Wireless Communications and Networking, 2018
Space-division multiple access (SDMA) utilizes linear precoding to separate users in the spatial domain and relies on fully treating any residual multi-user interference as noise. Non-orthogonal multiple access (NOMA) uses linearly precoded superposition
Yijie Mao, Bruno Clerckx, Victor O.K. Li
doaj   +1 more source

Thickness‐Dependent Skyrmion Evolution in Fe3GeTe2 During Magnetization Reversal

Advanced Functional Materials, EarlyView.
Thickness‐ and field‐dependent magnetic domain behavior in 2D van der Waals Fe3GeTe2 is studied using Lorentz TEM and micromagnetic simulations. A patch‐like domain phase evolves from skyrmions during magnetization reversal, and step edges between thickness regions act as pinning sites.
Jennifer Garland, John Fullerton, PeiYu Cai, Rabindra Basnet, Santosh Karki Chhetri, Jin Hu, Elton J. G. Santos, Yue Li, Charudatta Phatak, Amanda Petford‐Long   +9 more
wiley   +1 more source

Spectrally Tunable 2D Material‐Based Infrared Photodetectors for Intelligent Optoelectronics

Advanced Functional Materials, EarlyView.
Intelligent optoelectronics through spectral engineering of 2D material‐based infrared photodetectors. Abstract The evolution of intelligent optoelectronic systems is driven by artificial intelligence (AI). However, their practical realization hinges on the ability to dynamically capture and process optical signals across a broad infrared (IR) spectrum.
Junheon Ha, Yingshan Ma, Yong Nam An, Sung‐Un An, Hyeon Hak Jung, Suvi‐Tuuli Varjamo, Jiwon Yoo, Junho Min, Hanvit Kim, Faisal Ahmed, Sang Hoon Chae, Young Min Song, Weiwei Cai, Tawfique Hasan, Zhipei Sun, Dong‐Ho Kang, Hyeon‐Jin Shin, Yunyun Dai, Hoon Hahn Yoon   +18 more
wiley   +1 more source

Remorphable Architectures: Reprogramming Global Bistability through Locally Bistable Metamaterials

Advanced Materials, EarlyView.
Local bistable reconfiguration in mechanical metamaterials is leveraged in globally bistable architectures to enable in situ reprogrammable transition pathways through state flip of individual building blocks. The local‐to‐global correspondence of instabilities empowers soft robotic systems with on‐demand morphing traits, as well as aerospace ...
Lei Wu, Shujia Chen, Ali Elias Acha, Damiano Pasini   +3 more
wiley   +1 more source