smart antenna system
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Electronics ◽  
2021 ◽  
Vol 10 (16) ◽  
pp. 1877
Author(s):  
Hussein M. Hathal ◽  
Ramzy S. Ali ◽  
Abdulkareem S. Abdullah

Every day, a moss rose generates new flowers with variable diameters. Two flowering mechanisms are controlled by exposure to sunlight, namely, a variable concentration of florigen based on photoreceptors called phytochromes, and the biological clock, which is responsible for the changing diameters of the plant flowers at night and some hours during the day. By explaining and idealizing the flowering mechanisms of the moss rose in nature, a new sort of nature-inspired optimization algorithm called the moss rose optimization algorithm (MROA) was proposed in this study. The MROA was benchmarked using three methods. First, 18 benchmark functions were utilized to evaluate the effectiveness of the MROA. Second, the MROA was used for planning a smart antenna system (SA) as an online solution to find unknown weights. Third, the MROA was used to find the optimal dimensions for a microstrip antenna for the frequency (2.4 GHz) as an offline solution. The MROA was compared with other algorithms. The results show the capacities and proficiencies of the proposed algorithm regarding finding the ideal solutions. The promising arrangements for smart antenna identification and microstrip antenna design highlight the importance of this algorithm for resolving current issues with unknown fields of investigation.


Author(s):  
Aaron Don M. Africa ◽  
Rica Rizabel M. Tagabuhin ◽  
Jan Jayson S. D. Tirados

<span id="docs-internal-guid-ad3b6b0d-7fff-2d92-685e-3d423ac2713f"><span>Signals transmitted over a long range of distance may pass through several obstacles and scatter, taking multiple paths to reach the receiver. Beamforming antennas are controlled electronically to adjust the radiation pattern following the first received signal. This allows the antenna to maximize the received signal and consequently, suppress the interfering signals received. A smart antenna should be able to diminish noise, increase the signal to noise ratio, and have better system competence. The adaptive beam makes use of the spacing of the several antennas and the phase of the signal of each antenna array to control the shape and direction of the signal beam. This paper focuses on the use of smart antennas using an adaptive beam method as a better system for the transmission of signals. A simulation between the existing Omnidirectional antenna system and the smart antenna system will be made and compared. The paper will discuss the corresponding advantages that a smart antenna system has compared to the Omnidirectional antenna system.</span></span>


Author(s):  
 Prathviraj Khande ◽  
Yogesh K. B ◽  
Manu M. M ◽  
Ravikiran G. N ◽  
Devasis Pradhan

2021 ◽  
Vol E104.B (1) ◽  
pp. 109-117
Author(s):  
Tomoki MURAKAMI ◽  
Koichi ISHIHARA ◽  
Hirantha ABEYSEKERA ◽  
Yasushi TAKATORI

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