Volume 12 Number 2 July 2022

    
Signal Processing with Wavelets Using Fourier Analysis

Mariana Todorova, Reneta Ivanova

https://doi.org/10.6025/jes/2022/12/2/29-39

Abstract For organizing and processing signals, the Fourier analysis is used that provide elementary waves as a powerful device. We in this work investigated data with the ability to compress and permit the testing. We then compressed, filtered and processed the necessary information. We have used signal processing with many wavelets and finally we have compared the experimental results and made... Read More


Radiation Pattern in Antenna Reflectors with QUAD Antenna

Kalina Kalinovska and Kliment Angelov

https://doi.org/10.6025/jes/2022/12/2/40-47

Abstract Antenna reflectors are designed for an application which is not aimed in this paper. We also performed the radiation pattern with 2biQUAD antenna. In a contrast we have performed the radiation pattern in the vertical direction. Radio networks are likely to use the radio coverage applications with the measurements we have drawn.... Read More


Energy Efficiency Analysis Using Optical Switch and Splitters for Smart Sensors Charging

Jovan Shikoski, Juli Zlatev, Tinko Eftimov, Georgi Stanchev

https://doi.org/10.6025/jes/2022/12/2/48-54

Abstract Optical switch and splitters are used form smart sensors charging. There are many methods out of which we have reviewed two system of photon energy charge. While reviewing we have also performed energy efficiency analysis and compared it with similar methods. We have documented that the system with optical splitter is technically easier for construction and maintenance and also lesser... Read More