Results 51 to 60 of about 74,234 (189)

Architectures and Key Technical Challenges for 5G Systems Incorporating Satellites [PDF]

, 2018
Satellite Communication systems are a promising solution to extend and complement terrestrial networks in unserved or under-served areas. This aspect is reflected by recent commercial and standardisation endeavours. In particular, 3GPP recently initiated
Alagha, N., Andrenacci, S., Awoseyila, A., Chatzinotas, S., Cioni, S., Conti, M., Evans, B., Foggi, T., Gaudio, L., Guidotti, A., Maturo, N., Ugolini, A., Vanelli-Coralli, A.   +12 more
core   +3 more sources

NEXTRACK - Next Generation ESTRACK Uplink Services

2019 8th International Workshop on Tracking, Telemetry and Command Systems for Space Applications (TTC), 2019
The Consultative Committee for Space Data Systems has recently updated its recommendation for uplink communication systems, to cope with new requirements for telecommand and modern profiles and applications. Two short Low-Density Parity-Check (LDPC) codes have been added to the Coding and Synchronization sublayer options, to improve the link ...
Abello R., Prata R., Ugarte L. S., Simone L., Baldi M., Chiaraluce F., Fernandes R., Silva P. F. D., Garello R., Gelfusa D., Palomo J. M., Paolini E.   +11 more
openaire   +2 more sources

Beyond 5G and Non‐terrestrial Network (NTN) Integrated Architecture: Access Challenges for Expanding Artificial Intelligence of Things (AIoT)

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT This study analyzes the architecture of the beyond 5G‐NTN (Non‐terrestrial Network) integrated network and presents the technical, legal, and regulatory challenges and considerations for expanding the Artificial Intelligence of Things (AIoT) ecosystem.
Byung Woon Kim, Ga Eun Choi
wiley   +1 more source

Noiseless Attenuation for Continuous-Variable Quantum Key Distribution over Ground-Satellite Uplink

Applied Sciences, 2021
Satellite-based quantum key distribution (QKD) has lately received considerable attention due to its potential to establish a secure global network.
Shengjie Xu, Yin Li, Yijun Wang, Yun Mao, Zhiyue Zuo, Xinchao Ruan, Ying Guo   +6 more
doaj   +1 more source

Three‐Year Propagation Experiment at Ku‐, Ka‐, and Q‐Band in French West Indies

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT From January 2021 to December 2023, the Office National d'Etudes et de Recherches Aérospatiales (ONERA) and the Centre National d'Etudes Spatiales (CNES) conducted a three‐year Earth‐space propagation measurement campaign in Guadeloupe. The experiment used beacon receivers deployed in Pointe‐à‐Pitre airport to record signals at 11.2, 19.7, and
Jean‐Pascal Monvoisin, Laurent Castanet, Laurent Féral, Xavier Boulanger   +3 more
wiley   +1 more source

Analysis of 5G New Radio Uplink Signals on an Analogue-RoF System Based on DSP-Assisted Channel Aggregation

Applied Sciences, 2018
The 3rd Generation Partnership Project (3GPP) is in the process of developing 5th generation (5G) radio access technology, the so-called new radio (NR). The aim is to achieve the performance requirements forIMT-2020 radio interface technology.
Befekadu D. Mengesha, Pablo Torres-Ferrera, Roberto Gaudino   +2 more
doaj   +1 more source

Uplink rate enhancement algorithm for 5G network in intelligent mine

Gong-kuang zidonghua, 2021
The 5G application scenarios such as remote control, high-definition video, unmanned mine car and unmanned aerial vehicle in intelligent mine put forward new requirements for the uplink rate of wireless network.
JIANG Jianfeng1,2, CHEN Sihua3, YOU Lantao4   +2 more
doaj   +1 more source

Launch support: Managing complementor bottlenecks in the disruptive innovation of small satellites

Strategic Management Journal, EarlyView.
Abstract Research Summary Through both qualitative and quantitative analyses of large‐rocket providers' support for small‐satellite manufacturers before the emergence of small rockets, we examine how disruptors to an incumbent ecosystem gain support from complementors of the incumbent technology.
Yue Song, Yue Maggie Zhou, Xiaoping Zhao
wiley   +1 more source

Enhancing the Physical Layer Security of Uplink Non-Orthogonal Multiple Access in Cellular Internet of Things

IEEE Access, 2018
This paper investigates the physical-layer security of uplink non-orthogonal multiple access (NOMA) in the cellular Internet of Things (IoT) with invoking stochastic geometry. Poisson cluster process-based model is applied to characterize the NOMA uplink
Shuai Zhang, Xiaoming Xu, Huiming Wang, Jianhua Peng, Di Zhang, Kaizhi Huang   +5 more
doaj   +1 more source

Transmission Delay-Based Uplink Multi-User Scheduling in IEEE 802.11ax Networks

Applied Sciences, 2021
As the demands for uplink traffic increase, improving the uplink throughput has attracted research attention in IEEE 802.11 networks. To avoid excessive competition among stations and enhance the uplink throughput performance, the IEEE 802.11ax standard ...
Yonggang Kim, Gyungmin Kim, Youngwoo Oh, Wooyeol Choi   +3 more
doaj   +1 more source