Increasing the Accuracy Characteristics of Focused Electromagnetic Devices for Non-Destructive Testing and Technical Diagnostics by Implementing Sum–Difference Signal Processing

Vedenkin, Denis; Morozov, Oleg G.; Sedelnikov, Yuri E.; Agliullin, T. A.; Насыбуллин, А. Р.

doi:10.3390/electronics12020436

Cited by 4 publications

(2 citation statements)

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“…In underground tunnels, the electromagnetic ray attenuation becomes crucial after many times of scattering and reflections from the walls, floor, and ground when the conventional antenna systems are installed. The radiation characteristics and antenna parameters have substantial effects on field coverage [10,11]. Radiated leaky coaxial cables (LCX), generally known as the leaky feeders, were established in the late 1950s to prolong the transmission of VHF channels into relatively shorter underground conveyance tunnels, and such structures can be mostly found in urban areas [12].…”

Section: Introductionmentioning

confidence: 99%

A Critical Review on Channel Modeling: Implementations, Challenges and Applications

Saleem

Zhang

et al. 2023

Electronics

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In recent years, the use of massive multiple-input multiple-output (MIMO) systems and higher frequency bands for next-generation urban rail transportation systems has emerged as an intriguing research topic due to its potential to significantly increase network capacity by utilizing available narrowband and broadband spectrums. In metro and mining applications, the high-reliability wireless sensor network (WSN) plays a vital role in providing personal safety, channel optimization, and improving operational performance. Through the duration of 1921–2023, this paper provides the survey on the progress of fifth-generation (5G) and beyond-fifth-generation (B5G) wireless communication systems in underground environments such as tunnels and mines, the evolution of the earliest technologies, development in channel modeling for vehicle-to-vehicle (V2V) communications, and realization of different wireless propagation channels in high-speed train (HST) environments. In addition, the most recent advanced channel modeling methods are examined, including the development of new algorithms and their use in intelligent transportation systems (ITS); mathematical, analytical, and experimental techniques for propagation design; and the significance of the radiation characteristics, antenna placing, and physical environment effect on wireless communications. Leaky coaxial cable (LCX) and distributed antenna system (DAS) designs are introduced in the demonstrated systems for improving the channel capacity of narrowband and wideband channels as well as the spatial characteristics of various MIMO systems. The review article concludes by figuring out open research directions for future technologies.

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Section: Introductionmentioning

confidence: 99%

A Critical Review on Channel Modeling: Implementations, Challenges and Applications

Saleem

Zhang

et al. 2023

Electronics

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“…The fundamental possibility of forming sum and difference amplitude distributions of electromagnetic fields in the near radiated field zone makes it possible to realize sum-difference signal processing in order to reduce the level of the secondary maximum of the focused field. This article discusses the features of the formation of the sum and difference amplitude distributions and the principles of the sum-difference processing of focused electromagnetic fields, along with the implementation of technical solutions for non-destructive testing and technical diagnostic tasks [7].…”

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confidence: 99%