Results 1 to 10 of about 1,431,393 (189)

Channel Coding of a Quantum Measurement [PDF]

IEEE Journal on Selected Areas in Communications, 2020
In this work, we consider the preservation of a measurement for quantum systems interacting with an environment. Namely, a method of preserving an optimal measurement over a channel is devised, what we call channel coding of a quantum measurement in that operations are applied before and after a channel in order to protect a measurement.
Spiros Kechrimparis, Chahan M Kropf, Filip Wudarski   +2 more
exaly   +3 more sources

Channel Knowledge Map Construction Based on a UAV-Assisted Channel Measurement System

Drones
With the fast development of unmanned aerial vehicles (UAVs), reliable UAV communication is becoming increasingly vital. The channel knowledge map (CKM) is a crucial bridge connecting the environment and the propagation channel that may visually depict ...
Yanheng Qiu, Xiaomin Chen, Kai Mao, Xuchao Ye, Hanpeng Li, Farman Ali, Yang Huang, Qiuming Zhu   +7 more
doaj   +3 more sources

Dynamic vehicular channel characteristics analysis and TDL modeling in different scenarios [PDF]

Scientific Reports
Wireless channel analysis forms the foundation for characterizing channel models. Studying the channel characteristics in different scenarios is significant for reducing interference and enhancing channel stability.
Changzhen Li, Zijian Zhang, Susu Luo, Bei Zhang, Junyi Yu, Wei Chen   +5 more
doaj   +2 more sources

Air-to-Ground Path Loss Model at 3.6 GHz under Agricultural Scenarios Based on Measurements and Artificial Neural Networks

Drones, 2023
Unmanned aerial vehicles (UAVs) have found expanding utilization in smart agriculture. Path loss (PL) is of significant importance in the link budget of UAV-aided air-to-ground (A2G) communications.
Hanpeng Li, Kai Mao, Xuchao Ye, Taotao Zhang, Qiuming Zhu, Manxi Wang, Yurao Ge, Hangang Li, Farman Ali   +8 more
doaj   +1 more source

Long-term over-the-horizon microwave channel measurements and statistical analysis in evaporation ducts over the Yellow Sea

Frontiers in Marine Science, 2023
Maritime high-speed over-the-horizon wireless communication is realizable through evaporation ducts. Detailed measurement, analysis, and modeling of duct channels are essential for application of this communication technique.
Shuwen Wang, Shuwen Wang, Shuwen Wang, Kunde Yang, Kunde Yang, Kunde Yang, Yang Shi, Yang Shi, Hao Zhang, Hao Zhang, Fan Yang, Fan Yang, Fan Yang, Dawei Hu, Dawei Hu, Dawei Hu, Guoyu Dong, Guoyu Dong, Guoyu Dong, Yihang Shu, Yihang Shu, Yihang Shu   +21 more
doaj   +1 more source

Indoor Channel Measurement at 300 GHz and Comparison of Signal Propagation With 60 GHz

IEEE Access, 2023
In this paper, a newly developed 300 GHz channel sounder is presented followed by a detailed description of test measurements and the subsequent results obtained to validate its working.
Minseok Kim, Anirban Ghosh, Riku Takahashi, Kosuke Shibata   +3 more
doaj   +1 more source

Signal Processing and Channel Modelling for 5G Millimeter-Wave Communication Environment

Journal of Computing and Information Technology, 2023
Compared to frequency bands below 6 GHz, 5G millimeter waves offer several advantages, including a large bandwidth, minimal null delay, and flexible null port configuration.
Yu Qian
doaj   +1 more source

Channel Models and Measurements for 5G [PDF]

IEEE Communications Magazine, 2018
The fifth generation (5G) is expected to include new requirements, applications, and scenarios, and it will need massive and 3D multiple-input multiple output (MIMO), and increased spectrum via the use of millimeter-wave (mmWave) bands. The emerging techniques also pose new challenges to channel models.
Jianhua Zhang 0001, Mansoor Shafi, Andreas F. Molisch, Fredrik Tufvesson, Shangbin Wu, Koshiro Kitao   +5 more
openaire   +1 more source

Ship-to-ship maritime wireless channel modeling under various sea state conditions based on REL model

Frontiers in Marine Science, 2023
The propagation of electromagnetic waves on land and sea is significantly different. Although the Los scenario is significant in marine wireless communication, the marine wireless channel exists an obvious two-ray phenomenon due to the strong reflection ...
Fang Li, Fang Li, Yishui Shui, Jiayao Liang, Kun Yang, Junyi Yu   +5 more
doaj   +1 more source

Variational Sparse Bayesian Learning for Estimation of Gaussian Mixture Distributed Wireless Channels

Entropy, 2021
In this paper, variational sparse Bayesian learning is utilized to estimate the multipath parameters for wireless channels. Due to its flexibility to fit any probability density function (PDF), the Gaussian mixture model (GMM) is introduced to represent ...
Lingjin Kong, Xiaoying Zhang, Haitao Zhao, Jibo Wei   +3 more
doaj   +1 more source