Results 21 to 30 of about 12,691 (253)

When Will You Have a New Mobile Phone? An Empirical Answer From Big Data

IEEE Access, 2016
When and why people change their mobile phones are important issues in mobile communications industry, because it will impact greatly on the marketing strategy and revenue estimation for both mobile operators and manufactures.
Qingli Ma, Sihai Zhang, Wuyang Zhou, Shui Yu, Chonggang Wang   +4 more
doaj   +1 more source

Optical wireless communications for micromachines

SPIE Proceedings, 2006
A key challenge for wireless sensor networks is minimizing the energy required for network nodes to communicate with each other, and this becomes acute for self-powered devices such as 'smart dust'. Optical communications is a potentially attractive solution for such devices.
O'Brien, D, Yuan, W, Liu, J, Faulkner, G, Elston, S, Collins, S, Parry-Jones, L   +6 more
openaire   +2 more sources

Underwater Optical Wireless Communications: Overview [PDF]

Sensors, 2020
Underwater Optical Wireless Communication (UOWC) is not a new idea, but it has recently attracted renewed interest since seawater presents a reduced absorption window for blue-green light. Due to its higher bandwidth, underwater optical wireless communications can support higher data rates at low latency levels compared to acoustic and RF counterparts.
Giuseppe Schirripa Spagnolo, Lorenzo Cozzella, Fabio Leccese   +2 more
openaire   +3 more sources

Generalization-Enhanced Channel Estimation Through Adaptive Interpolation and Multi-Task Learning-Based Denoising Network

IEEE Transactions on Machine Learning in Communications and Networking
Accurate CSI estimation with low pilots is desirable for the multiple-input multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) system.
Bolin Wang, Li Chen, Xiaohui Chen, Weidong Wang   +3 more
doaj   +1 more source

Hierarchically Federated Learning in Wireless Networks: D2D Consensus and Inter-Cell Aggregation

IEEE Transactions on Machine Learning in Communications and Networking
Decentralized federated learning (DFL) architecture enables clients to collaboratively train a shared machine learning model without a central parameter server.
Jie Zhang, Li Chen, Yunfei Chen, Xiaohui Chen, Guo Wei   +4 more
doaj   +1 more source

Classification of Human Motions Using Micro-Doppler Radar in the Environments with Micro-Motion Interference

Sensors, 2019
Human motion classification based on micro-Doppler effect has been widely used in various fields. However, the motion classification performance would be greatly degraded if the wireless environment has non-target micro-motion interference. In this case,
Xiaolin Ma, Running Zhao, Xinhua Liu, Hailan Kuang, Mohammed A. A. Al-qaness   +4 more
doaj   +1 more source

Improved Diver Communication System by Combining Optical and Electromagnetic Trackers

Sensors, 2020
The increasing need for observation in seawater or ocean monitoring systems has ignited a considerable amount of interest and the necessity for enabling advancements in technology for underwater wireless tracking and underwater sensor networks for ...
Aman Kataria, Smarajit Ghosh, Vinod Karar, Takshi Gupta, Kathiravan Srinivasan, Yuh-Chung Hu   +5 more
doaj   +1 more source

Advanced Progress of Optical Wireless Technologies for Power Industry: An Overview

Applied Sciences, 2020
Optical wireless communications have attracted widespread attention in the traditional power industry because of the advantages of large spectrum resources, strong confidentiality, and freedom from traditional electromagnetic interference.
Jupeng Ding, Wenwen Liu, Chih-Lin I, Hui Zhang, Hongye Mei   +4 more
doaj   +1 more source

Energy Efficient User Association for Cloud Radio Access Networks

IEEE Access, 2016
Cloud radio access network (C-RAN) and massive multiple-input multiple-output (MIMO) are recognized as two key technologies for the fifth-generation mobile networks.
Jun Zuo, Jun Zhang, Chau Yuen, Wei Jiang, Wu Luo   +4 more
doaj   +1 more source

Biodegradable and Biocompatible Functional Polymers for Biomedical Applications

Advanced Functional Materials, EarlyView.
Biodegradable and biocompatible functional polymers integrate electrical, mechanical, and stimuli‐responsive functionalities while enabling programmed degradation under physiological conditions. This review introduces recent advances in conductive, shape‐memory, self‐healing, photocurable, and adhesive polymer systems, emphasizing material design ...
Won Bae Han, Shuvra Mondal, Sungkeun Han, Chan‐Hwi Eom, Venkata Ramesh Naganaboina, Suk‐Won Hwang   +5 more
wiley   +1 more source