Temat: MIMO System - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Matrix Analysis and Pulse Transmission of Antenna Array for MIMO UWB Systems
Autorzy:: Czawka, G.
Garbaruk, M.
Powiązania:: https://bibliotekanauki.pl/articles/226514.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: planar UWB antennas
computer-aided design
ultra-wideband communication
MIMO system
Opis:: This paper presents a theoretical matrix analysis of antenna structure consisting of two double-element planar antennas for ultra-wideband (UWB) application in 2*2 MIMO indoor communication systems. The structure and characteristics of planar two-element UWB antenna are presented. Two matrix models of MIMO antenna system are represented in the paper. A standard MIMO signal transmission matrix without taking into consideration the coupling between antennas is described. A new approach to a full electromagnetic analysis based on the scattering matrix of the MIMO spatial antenna array is proposed. Functional power parameters for the whole MIMO UWB transmit-receive antenna structure are introduced. Results of computer simulations of different matrices describing a MIMO antenna system and the transmission propagation pulses are presented.
Źródło:: International Journal of Electronics and Telecommunications; 2011, 57, 1; 91-96
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Interference in Multi-beam Antenna System of 5G Network
Autorzy:: Kelner, Jan M.
Ziółkowski, Cezary
Powiązania:: https://bibliotekanauki.pl/articles/226986.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: systems and networks
interference
multi-elliptical propagation model
multi-beam antenna system
simulation studies
massive MIMO
Opis:: 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 this case, the increasing effectiveness is understood mainly as the growth of network capacity resulting from better diversification of radio resources due to their spatial multiplexing in macro- and micro-cells. However, using the narrow beams in lieu of the hitherto used cell-sector brings occurring interference between the neighboring beams in the massive-MIMO antenna system, especially, when they utilize the same frequency channel. An analysis of this effect is the aim of this paper. In this case, it is based on simulation studies, where a multi-elliptical propagation model and standard 3GPP model are used. We present the impact of direction and width of the neighboring beams of 5G new radio gNodeB base station equipped with the multi-beam antenna system on the interference level between these beams. The simulations are carried out for line-of-sight (LOS) and non-LOS conditions of a typical urban environment.
Źródło:: International Journal of Electronics and Telecommunications; 2020, 66, 1; 17-23
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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