Zobrazeno 1 - 10
of 629
pro vyhledávání: '"A. F. Molisch"'
Autor:
A. Burr, E. Bonek, N. Czink, M. Debbah, V. Degli-Esposti, H. Hofstetter, P. Kyösti, D. Laurenson, G. Matz, A. F. Molisch, C. Oestges, H. Özcelik, P. Almers
Publikováno v:
EURASIP Journal on Wireless Communications and Networking, Vol 2007 (2007)
This paper provides an overview of the state-of-the-art radio propagation and channel models for wireless multiple-input multiple-output (MIMO) systems. We distinguish between physical models and analytical models and discuss popular examples from bo
Externí odkaz:
https://doaj.org/article/3ec96c6e8e724d819fee780c64e5d72a
Autor:
Daoud Burghal, Yang Li, Pranav Madadi, Yeqing Hu, Jeongho Jeon, Joonyoung Cho, Andreas F. Molisch, Jianzhong Zhang
Publikováno v:
IEEE Access, Vol 11, Pp 117810-117825 (2023)
Accurate Channel State Information (CSI) is critical for maximizing the throughput of massive Multi-Input Multi-Output (mMIMO) systems. Due to the environment dynamics and user mobility, CSI aging is a major challenge to achieving the large throughpu
Externí odkaz:
https://doaj.org/article/3ac54da1edd740bca6abe7c5d8c091bb
Autor:
Fawad Sheikh, Andreas Prokscha, Johannes M. Eckhardt, Tobias Doeker, Naveed A. Abbasi, Jorge Gomez-Ponce, Benedikt Sievert, Jan Taro Svejda, Andreas Rennings, Jan Barowski, Christian Schulz, Ilona Rolfes, Daniel Erni, Andreas F. Molisch, Thomas Kurner, Thomas Kaiser
Publikováno v:
IEEE Journal of Microwaves, Vol 3, Iss 1, Pp 289-304 (2023)
In recent years, terahertz (THz) systems have become an increasingly popular area of research thanks to their unique properties such as extremely high data rates towards Tb/s, submillimeter localization accuracy, high resolution remote sensing of mat
Externí odkaz:
https://doaj.org/article/7f3e4b1465624b8786c2f2b1ca087f1d
Autor:
Xinzhou Su, Runzhou Zhang, Zhe Zhao, Hao Song, Amir Minoofar, Nanzhe Hu, Huibin Zhou, Kaiheng Zou, Kai Pang, Haoqian Song, Brittany Lynn, Shlomo Zach, Moshe Tur, Andreas F. Molisch, Hirofumi Sasaki, Doohwan Lee, Alan E. Willner
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-15 (2022)
Abstract The channel capacity of terahertz (THz) wireless communications can be increased by multiplexing multiple orthogonal data-carrying orbital-angular-momentum (OAM) beams. In THz links using OAM multiplexing (e.g., Laguerre-Gaussian $${\mathrm{
Externí odkaz:
https://doaj.org/article/1d62b9ec6901481f9af3947d956a29a5
Autor:
Vishnu V. Ratnam, Jianhua Mo, Ahmad Alammouri, Boon Loong Ng, Jianzhong Zhang, Andreas F. Molisch
Publikováno v:
IEEE Access, Vol 10, Pp 73364-73377 (2022)
Hybrid beamforming is an attractive solution to build cost-effective and energy-efficient transceivers for millimeter-wave and terahertz systems. However, conventional hybrid beamforming techniques rely on analog components that generate a frequency
Externí odkaz:
https://doaj.org/article/adeb569ccd934b08a77857a744894ba6
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 3, Pp 435-460 (2022)
In recent years wireless propagation channel research has paid considerable attention to dense multipath, which is an indispensable part of propagation channels and may significantly contribute to the received power in variety of environments and fre
Externí odkaz:
https://doaj.org/article/1e8dd9013c42485abf581f280eaa841c
Publikováno v:
IEEE Open Journal of Antennas and Propagation, Vol 3, Pp 663-686 (2022)
Design and assessment of THz communications systems, which will form an essential part of 6G, require an understanding of the propagation channels the systems will operate in. This paper presents investigations of the channel characteristics in vario
Externí odkaz:
https://doaj.org/article/f3ffa76939a743da8928776e3685f4a1
Autor:
Zhe Zhao, Runzhou Zhang, Hao Song, Kai Pang, Ahmed Almaiman, Huibin Zhou, Haoqian Song, Cong Liu, Nanzhe Hu, Xinzhou Su, Amir Minoofar, Hirofumi Sasaki, Doohwan Lee, Moshe Tur, Andreas F. Molisch, Alan E. Willner
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
Abstract Orbital-angular-momentum (OAM) multiplexing has been utilized to increase the channel capacity in both millimeter-wave and optical domains. Terahertz (THz) wireless communication is attracting increasing attention due to its broadband spectr
Externí odkaz:
https://doaj.org/article/172382cfc3754222b822b7df2041d5fc
Autor:
Thomas Choi, Masaaki Ito, Issei Kanno, Jorge Gomez-Ponce, Colton Bullard, Takeo Ohseki, Kosuke Yamazaki, Andreas F. Molisch
Publikováno v:
IEEE Open Journal of Circuits and Systems, Vol 2, Pp 792-804 (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). The energy efficiency (EE) of the uplink is dete
Externí odkaz:
https://doaj.org/article/539619bc60414377bd231da5cea7c462
Publikováno v:
IEEE Access, Vol 8, Pp 33909-33925 (2020)
The concentrated popularity distribution of video files and the caching of popular files on users and their subsequent distribution via device-to-device (D2D) communications have dramatically increased the throughput of wireless video networks. Howev
Externí odkaz:
https://doaj.org/article/d2b66fe875e64bb19d72436ae36846d6