Results 11 to 20 of about 12,094 (256)

Parasitic Elements Shorted to Ground to Enhance the Bandwidth of a Dual-Polarized Antenna

International Journal of Antennas and Propagation, 2022
An ultra-wideband dual-polarized antenna covering multiple communication standards such as LTE700/GSM850/GSM900 is proposed in this paper. The antenna consists of two dipoles that are perpendicularly placed to each other. The two dipoles can generate +45°
Haokai Jia, Jinjun Mo, Lin Peng
doaj   +1 more source

ENHANCEMENT OF DATA MANAGEMENT IN BROADBAND WIRELESS COMMUNICATION SYSTEM USING MOBILITY MANAGEMENT MODEL

ICTACT Journal on Communication Technology, 2022
With the development of communication networks towards broadband and mobility, optical fiber wireless communication system combines optical fiber communication and wireless communication.
Nirmal Adhikari, Nasmin Jiwani, Ketan Gupta   +2 more
doaj   +1 more source

Experimental Study and Application of Response Mask Invariant Characteristic for Generalized Visible Light Communication Channel

IEEE Photonics Journal, 2018
In this paper, we describe a generalized visible light communication (VLC) channel, which consists of the frequency responses of the light emitting diode (LED), the wireless optical channel, and the photo detector (PD).
Fangzhou Wu, Li Chen, Shaoyang Cai, Weidong Wang   +3 more
doaj   +1 more source

Optical wireless communication systems [PDF]

Optik, 2017
The emerging field of optical wireless communication (OWC) systems is seen as potential complementary technology to the radio frequency wireless communications in certain applications. It is deemed as a possible technology in the future 5th Generation communication networks to address the spectrum congestion and improve the system's capacity.
Ghassemlooy, Zabih, Zvanovec, Stanislav, Khalighi, Mohammad Ali, Popoola, Wasiu, Pérez, Joaquín, Khalighi, Mohammad-Ali   +5 more
openaire   +3 more sources

HRO-OFDM Scheme Design and Optimization for a Hybrid RF/VLC Baseband System

IEEE Photonics Journal, 2017
A hybrid radio frequency (RF) and visible light communication (VLC) system can provide better data rate performance and user experience, and only the hybrid RF/VLC systems that use independent RF access points (APs) and VLC APs have been currently ...
Fangzhou Wu, Li Chen, Weidong Wang
doaj   +1 more source

Beam-steering metasurfaces assisted coherent optical wireless multichannel communication system

Nanophotonics, 2023
The metasurface based beam-steering devices with the advantages of large steering angles, arbitrary channels and ultra-compactness have played an important role for data allocation and exchange in the optical wireless communication.
Tao Jin, You Quan, Yang Chao, Li Zile, Deng Liangui, Wu Mian, Luo Ming, Wu Lin, Li Chao, Liu Zichen, He Zhixue, Xiao Xi, Zheng Guoxing, Yu Shaohua   +13 more
doaj   +1 more source

Fusion of Multiple Pyroelectric Characteristics for Human Body Identification

Algorithms, 2014
Due to instability and poor identification ability of single pyroelectric infrared (PIR) detector for human target identification, this paper proposes a new approach to fuse the information collected from multiple PIR sensors for human identification ...
Wanchun Zhou, Ji Xiong, Fangmin Li, Na Jiang, Ning Zhao   +4 more
doaj   +1 more source

Tradeoff between compression ratio and decoding delay of distributed source coding for uplink transmissions in machine-type communication

International Journal of Distributed Sensor Networks, 2018
Rapid growth of machine-type communications devices challenges the future network with a significant aggregated data traffic. Distributed source coding is a promising technique that compresses data sources and decreases required aggregated data ...
Wen Wang, Jinkang Zhu, Sihai Zhang, Wuyang Zhou   +3 more
doaj   +1 more source

Research on Underwater Wireless Optical Communication Channel Model and Its Application

Applied Sciences, 2023
Underwater wireless optical communication (UWOC) is an emerging technology with wide-ranging applications in marine exploration, offshore industries, environmental monitoring, and underwater robotics.
Kai Sun, Yiyang Li, Zekai Han
doaj   +1 more source

Communication Efficient Federated Learning With Quantization-Aware Training Design

IEEE Transactions on Machine Learning in Communications and Networking
Model quantization is an effective method that can improve communication efficiency in federated learning (FL). The existing FL quantization protocols almost stay at the level of post-training quantization (PTQ), which comes at the cost of large ...
Xiang Fang, Li Chen, Huarui Yin, Xiaohui Chen, Weidong Wang   +4 more
doaj   +1 more source