Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Cezary Ziółkowski"'
Publikováno v:
Journal of Telecommunications and Information Technology, Iss 2 (2023)
Our aim is to develop the method of location subscriber to be used in military communication nets. This method is based on frequency offset measurement. Analytic description of the Doppler effect creates one of such possibilities. In this paper, an o
Externí odkaz:
https://doaj.org/article/fed031ee792e426aaaf27dabcfe51f65
Publikováno v:
Sensors, Vol 23, Iss 22, p 9022 (2023)
The occurrence of cross-beam interference in the received signal is one of the main problems that limit the possibilities of massive multiple-input–multiple-output technology (massive-MIMO) in fifth-generation (5G) systems. Thus, the evaluation of
Externí odkaz:
https://doaj.org/article/d548ca1bdbaf415a848d05fe96d0d19c
Autor:
Jan M. Kelner, Cezary Ziółkowski
Publikováno v:
International Journal of Electronics and Telecommunications, Vol vol. 66, Iss No 1, Pp 17-23 (2020)
Massive multiple-input-multiple-output (MIMO) and beamforming are key technologies, which significantly influence on increasing effectiveness of emerging fifth-generation (5G) wireless communication systems, especially mobile-cellular networks. In th
Externí odkaz:
https://doaj.org/article/a7d682b392804bdd80ac895cf9ac15e6
Publikováno v:
Sensors, Vol 21, Iss 24, p 8296 (2021)
The basic technology that will determine the expansion of the technical capabilities of fifth generation cellular systems is a massive multiple-input-multiple-output. Therefore, assessing the influence of the antenna beam orientations on the radio ch
Externí odkaz:
https://doaj.org/article/18e5d0ebe7b44261a0b6d9e8ae0684c6
Publikováno v:
Sensors, Vol 21, Iss 3, p 793 (2021)
This paper presents a methodology for assessing co-channel interference that arises in multi-beam transmitting and receiving antennas used in fifth-generation (5G) systems. This evaluation is essential for minimizing spectral resources, which allows
Externí odkaz:
https://doaj.org/article/41388fcf7e8a4ab89d16262d5d5481af
Publikováno v:
Sensors, Vol 21, Iss 2, p 597 (2021)
Multi-beam antenna systems are the basic technology used in developing fifth-generation (5G) mobile communication systems. In practical implementations of 5G networks, different approaches are used to enable a massive multiple-input-multiple-output (
Externí odkaz:
https://doaj.org/article/23be8fe7d0974e4f94271354b3c5559b
Autor:
Jan M. Kelner, Cezary Ziółkowski
Publikováno v:
Sensors, Vol 20, Iss 9, p 2575 (2020)
This paper focused on assessing the effectiveness of the signal Doppler frequency (SDF) method to locate a mobile emitter using a swarm of unmanned aerial vehicles (UAVs). Based on simulation results, we showed the impact of various factors such as t
Externí odkaz:
https://doaj.org/article/94d4184687a2484fbdffd781ba91205a
Autor:
Jan M. Kelner, Cezary Ziółkowski
Publikováno v:
Journal of Advanced Transportation, Vol 2017 (2017)
Currently, almost unrestricted access to low-lying areas of airspace creates an opportunity to use unmanned aerial vehicles (UAVs), especially those capable of vertical take-off and landing (VTOL), in transport services. UAVs become increasingly popu
Externí odkaz:
https://doaj.org/article/3b77831d9724452d973b54cf99e75034
Autor:
Cezary Ziółkowski, Jan M. Kelner
Publikováno v:
International Journal of Antennas and Propagation, Vol 2015 (2015)
The paper presents an estimation of the reception angle distribution based on temporal characteristics such as the power delay spectrum (PDS) or power delay profile (PDP). Here, we focus on such wireless environment, where the propagation phenomenon
Externí odkaz:
https://doaj.org/article/f8ad4a21e78a4cf7ac6fc8f3b81070d0
Autor:
Cezary ZIÓŁKOWSKI
Publikováno v:
PRZEGLĄD TELEKOMUNIKACYJNY - WIADOMOŚCI TELEKOMUNIKACYJNE. 1:57-60
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::41b1598685f8be501a31859246364ca4
https://doi.org/10.15199/59.2022.4.9
https://doi.org/10.15199/59.2022.4.9