Results 61 to 70 of about 25,641,075 (274)

Numerical Investigation of the Equalization Enhanced Phase Noise Penalty for M-Quadrature Amplitude Modulation Formats in Short-Haul Few-Mode Fiber Transmission Systems with Time-Domain Equalization

Applied Sciences, 2018
The equalization enhanced phase noise (EEPN), caused by the interaction of the chromatic dispersion (CD) with the phase noise of the local oscillator (LO), has been extensively studied for single-mode optical communication systems.
José Manuel Delgado Mendinueta, Werner Klaus, Jun Sakaguchi, Satoshi Shinada, Hideaki Furukawa, Yoshinari Awaji, Naoya Wada   +6 more
doaj   +1 more source

Joint Transmit Beamforming for Multiuser MIMO Communications and MIMO Radar

IEEE Transactions on Signal Processing, 2019
Future wireless communication systems are expected to explore spectral bands typically used by radar systems, in order to overcome spectrum congestion of traditional communication bands.
Xiang Liu, Tianyao Huang, Yimin Liu, Jie Zhou   +3 more
semanticscholar   +1 more source

Vehicles detection through wireless sensors networks and optical fiber sensors

Scientific Reports
Due to the evolving variations in government and political systems both domestically and internationally, along with the imposition of high tariffs at borders, these borders have become vulnerable points for terrorism and smuggling activities ...
Hacen Khlaifi, Amira Zrelli, Tahar Ezzedine   +2 more
doaj   +1 more source

OAM-MIMO Multiplexing Transmission System for High-Capacity Wireless Communications on Millimeter-Wave Band [PDF]

, 2023
Hirofumi Sasaki, Yasunori Yagi, Hiroyuki Fukumoto, Doohwan Lee   +3 more
openalex   +1 more source

MU-MIMO Communications With MIMO Radar: From Co-Existence to Joint Transmission [PDF]

IEEE Transactions on Wireless Communications, 2017
Beamforming techniques are proposed for a joint multi-input-multi-output (MIMO) radar-communication (RadCom) system, where a single device acts as radar and a communication base station (BS) by simultaneously communicating with downlink users and ...
Fan Liu, C. Masouros, Ang Li, Huafei Sun, L. Hanzo   +4 more
semanticscholar   +1 more source

Communications in the 6G Era

IEEE Access, 2020
The focus of wireless research is increasingly shifting toward 6G as 5G deployments get underway. At this juncture, it is essential to establish a vision of future communications to provide guidance for that research. In this paper, we attempt to paint a
H. Viswanathan, P. Mogensen
semanticscholar   +1 more source

Robust and Secure Wireless Communications via Intelligent Reflecting Surfaces [PDF]

IEEE Journal on Selected Areas in Communications, 2019
In this paper, intelligent reflecting surfaces (IRSs) are employed to enhance the physical layer security in a challenging radio environment. In particular, a multi-antenna access point (AP) has to serve multiple single-antenna legitimate users, which do
Xianghao Yu, Dongfang Xu, Ying Sun, Derrick Wing Kwan Ng, R. Schober   +4 more
semanticscholar   +1 more source

Double side passivation of phenylethyl ammonium iodide for all perovskite tandem solar cell with efficiency of 26.8%

EcoEnergy
All‐perovskite tandem solar cells are regarded as the next generation of devices capable of enhancing the solar energy utilization rate. Unlike single‐junction perovskite solar cells (PSCs), the efficacy of tandem cells is contingent upon the performance
Huan Bi, Jiaqi Liu, Liang Wang, Zheng Zhang, Gaurav Kapil, Shahrir Razey Sahamir, Ajay Kumar Baranwal, Yuyao Wei, Yongge Yang, Dandan Wang, Takeshi Kitamura, Hiroshi Segawa, Qing Shen, Shuzi Hayase   +13 more
doaj   +1 more source

Energy Efficiency of Uplink Cell-Free Massive MIMO With Transmit Power Control in Measured Propagation Channel

IEEE Open Journal of Circuits and Systems, 2021
Cell-free massive MIMO (CF-mMIMO) provides wireless connectivity for a large number of user equipments (UEs) using access points (APs) distributed across a wide area with high spectral efficiency (SE).
Thomas Choi, Masaaki Ito, Issei Kanno, Jorge Gomez-Ponce, Colton Bullard, Takeo Ohseki, Kosuke Yamazaki, Andreas F. Molisch   +7 more
doaj   +1 more source

Commercialisation of government communications:submission to the Government Communications Review Group, Stirling Media Research Institute [PDF]

, 2003
Much of the debate around government communications has focused on the use of special advisers, the lobby system and the centralisation of the system under Alastair Campbell.
Miller, David
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