Results 251 to 260 of about 401,757 (275)

Machine Learning Codebook Design for Initial Access and CSI Type-II Feedback in Sub-6-GHz 5G NR

IEEE Transactions on Wireless Communications
Beam codebooks are a recent feature to enable high dimension multiple-input multiple-output in 5G. Codebooks comprised of customizable beamforming weights can be used to transmit reference signals and aid the channel state information (CSI) acquisition ...
Ryan M. Dreifuerst, Robert W. Heath
semanticscholar   +1 more source

Your Locations May Be Lies: Selective-PRS-Spoofing Attacks and Defence on 5G NR Positioning Systems

IEEE Conference on Computer Communications, 2023
5G positioning systems, as a solution for city-range integrated-sensing-and-communication (ISAC), are flooding into reality. However, the positioning security aspects of such an ISAC system have been overlooked, bringing threats to more than a billion 5G
Kaixuan Gao, Hui-qiang Wang, Hongwu Lv, Pengfei Gao   +3 more
semanticscholar   +1 more source

Asymmetrical fed Calendula flower-shaped four-port 5G-NR band (n77, n78, and n79) MIMO antenna with high diversity performance

International journal of microwave and wireless technologies, 2022
This research reports a four-port multiple-input-multiple-output (MIMO) antenna designed for 5G-NR band applications including n77: 3.30–4.20 GHz, n78: 3.30–3.80 GHz, and n79: 4.40–5.00 GHz.
Tathababu Addepalli, T. Vidyavathi, K. Neelima, M. Sharma, D. Kumar   +4 more
semanticscholar   +1 more source

A novel arc‐shaped four‐port wideband (21.8–29.1 GHz) MIMO antenna with improved characteristics for 5G NR networks

International Journal of Communication Systems
A novel antenna system that utilizes multiple‐input and multiple‐output (MIMO) technology to suit the requirements of 5G applications is proposed in this article.
Nour Elhouda Nasri, M. El Ghzaoui, Sudipta Das, Tanvir Islam, Wael A E Ali, Mohammed Fattah   +5 more
semanticscholar   +1 more source

A Multiband/Multistandard 15–57 GHz Receive Phased-Array Module Based on 4 × 1 Beamformer IC and Supporting 5G NR FR2 Operation

IEEE transactions on microwave theory and techniques, 2022
This work presents a 15–57 GHz multiband/ multistandard phased-array architecture for the fifth-generation (5G) new radio (NR) frequency range 2 (FR2) bands.
Abdulrahman A. Alhamed, Oguz Kazan, Gokhan Gultepe, Gabriel M. Rebeiz   +3 more
semanticscholar   +1 more source

Dynamic Feature-Fused Localization With Smartphones Exploiting 5G NR SSB and Wi-Fi for Indoor Environments

IEEE Transactions on Instrumentation and Measurement
With the rapid development and wide deployment of fifth-generation (5G) and wireless fidelity (Wi-Fi) technologies, indoor positioning has entered a new era.
Haoxiao Yang, Liang Chen, Han Liu, Guanwen Zhu   +3 more
semanticscholar   +1 more source

High-Speed Train Positioning Using Deep Kalman Filter With 5G NR Signals

IEEE transactions on intelligent transportation systems (Print), 2022
Positioning is the most basic yet important process in a train control system. In practical train systems, the position of a train is determined with a track circuit, a radio frequency (RF) tag called a “balise”, or a tachometer.
Kyeongjun Ko, Ilmu Byun, Woo-jin Ahn, W. Shin   +3 more
semanticscholar   +1 more source

5G NR Overview and Physical Layer

2020
This text deals primarily with the physical layer. However, to better understand its operation, it is helpful to stand back a bit and study, at a high level, its surrounding architecture and protocols. To this end, we review in this chapter the main architecture options for connection to the core network followed by the Radio Access Network (RAN ...
openaire   +2 more sources

5G NR Positioning Enhancements in 3GPP Release-I8

IEEE Communications Magazine
New radio (NR) positioning in the Third Generation Partnership Project (3GPP) Release 18 (Rel-18) enables 5G-advanced networks to achieve ultra-high accuracy positioning without dependence on global navigation satellite systems (GNSS) with key enablers ...
Hyun-Su Cha, Gilsoo Lee, Amitava Ghosh, Matthew Baker, Sean Kelley, Juergen Hofmann   +5 more
semanticscholar   +1 more source

Simultaneous Transmission of 5G MMW and Sub-THz Signals Through a Fiber-FSO-5G NR Converged System

Journal of Lightwave Technology, 2022
Simultaneous transmission of fifth-generation (5G) millimeter-wave (MMW) and sub-THz signals through a fiber-free-space optical (FSO)-5G new radio (NR) converged system is successfully achieved.
Hai-Han Lu, Chung-Yi Li, W. Tsai, Poh-Suan Chang, Yu-Ting Chen, Chen-Xuan Liu, Ting-Huan Ko, Yan-Yu Lin   +7 more
semanticscholar   +1 more source