Autor: Al-rawi, A. A. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Performance analysis and evaluation of massive MIMO system
Autorzy:: Al-Rawi, Muaayed F.
Abbou, Izz K.
Al-Awad, Nasir A.
Powiązania:: https://bibliotekanauki.pl/articles/118039.pdf
Data publikacji:: 2020
Wydawca:: Polskie Towarzystwo Promocji Wiedzy
Tematy:: performance analysis
MIMO
Rician fading channels
analiza wydajności
zanikający kanał Rician
Opis:: This article examines the performance of massive MIMO uplink system over Rician fading channel. The performance is estimated regarding spectral efficiency versus number of base station antennas utilizing three plans of linear detection, maximum-ratio-combining (MRC), zero forcing receiver (ZF), and minimum mean-square error receiver (MMSE). The simulation results reveal that the spectral efficiency increments altogether with expanding the quantity of base station antennas. Additionally, the spectral efficiency with MMSE is superior to that with ZF, and the last is superior to that with MRC. Furthermore, the spectral efficiency diminishes with expanding the fading parameter.
Źródło:: Applied Computer Science; 2020, 16, 2; 112-119
1895-3735
Pojawia się w:: Applied Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Genetic algorithm-PID controller for model order reduction pantographcatenary system
Autorzy:: Al-Awad, Nasir A.
Abboud, Izz K.
Al-Rawi, Muaayed F.
Powiązania:: https://bibliotekanauki.pl/articles/1837796.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Promocji Wiedzy
Tematy:: pantograph system
model reduction
PSO
G.A-PID
IMC
LQR
system pantografowy
redukcja modelu
Opis:: Controlling the contact force between the pantograph and the catenary has come to be a requirement for improving the performances and affectivity of high-speed train systems Indeed, these performances can also significantly be decreased due to the fact of the catenary equal stiffness variation. In addition, the contact force can also additionally differ and ought to end up null, which may additionally purpose the loss of contact. Then, in this paper, we current an active manipulate of the minimize order model of pantograph-catenary system. The proposed manipulate approach implements an optimization technique, like particle swarm (PSO), the usage of a frequent approximation of the catenary equal stiffness. All the synthesis steps of the manipulate law are given and a formal evaluation of the closed loop stability indicates an asymptotic monitoring of a nominal steady contact force. Then, the usage of Genetic Algorithm with Proportional-Integral-derivative (G.A-PID) as proposed controller appeared optimum response where, the contacts force consequences to be virtually equal to its steady reference. Finally it seems the advantageous of suggestion approach in contrast with classical manipulate strategies like, Internal mode control(IMC) method, linear quadratic regulator (LQR). The outcomes via the use of MATLAB simulation, suggests (G.A-PID) offers better transient specifications in contrast with classical manipulate.
Źródło:: Applied Computer Science; 2021, 17, 2; 28-39
1895-3735
Pojawia się w:: Applied Computer Science
Dostawca treści:: Biblioteka Nauki

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