Terahertz Range Telecommunication Systems

Ilchenko, M. E.; Нарытник, Т. Н.; Fisun, A.I.; Belous, O.I.

doi:10.1615/telecomradeng.v70.i16.60

Cited by 16 publications

(4 citation statements)

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“…Створення пристроїв, систем і мереж ТГц-діапазону здатне радикально змінити принципи і теоретичні підходи до побудови транспортних розподільних мереж мобільного зв'язку п'ятого покоління, систем управління військового призначення. Крім того, відкриваються величезні перспективи їх використання в інших різних областях -від аерокосмічної та метеорології до медицини і безпеки [5,6].…”

Section: постановка задачі дослідженняunclassified

Терагерцові Технології В Телекомунікаційних Системах. Частина 1. Обґрунтування Частотного Діапазону, Проектування Функціональних Вузлів Телекомунікаційних Систем Терагерцового Діапазону

Авдєєнко¹,

Бунін²,

Наритник³

2018

aktt

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The article presented results of researches conducted by the team of authors devoted to the possibilities of creation for the first time in Ukraine the real prerequisites for solving the fundamental problem of constructing digital telecommunication systems with the use of terahertz technologies. The necessity of transition to the use of the terahertz frequency range substantiated during the deployment of future telecommunication systems of ultra-high bandwidth. The analysis of characteristics of the path of signal propagation and determination of signal losses in conditions of operation of the radio relay system in the terahertz frequency range is carried out. The conducted analysis has shown that in the frequency range of 30-300 GHz, the most important types of fading that should consider during the design are fading due to the easing of the signal by hydrometeors and fading due to the absorption of the radio signal in gases, fading due to the influence of the antenna pattern. It determined that the work of the radio relay lines in the terahertz range allows practically not to take into consideration the refraction and interference of electromagnetic waves reflected from interference in the zone of radio signal propagation, which arises especially in conditions of dense urban development. This is due primarily to the fact that the terahertz waves have a low ability to "bend" the noise, and secondly, at the current frequency of 30 to 300 Hz apply at relatively small distances (up to 5 km), which allows for avoiding spatial planning interference to the zone of direct visibility of antennas and the first Fresnel zone. It considered the main factors that lead to the emergence of fading in radio relay communication lines. It is shown that in the terahertz range the greatest influence on the energy potential of the radio-relay lines is attenuating in hydro meteors and gases. The terahertz frequency range areas allocated that is most suitable for application in radio relay communication lines. The principles of formation of signal-code construction considered methods and new technical solutions for choosing the type of signal construction proposed in order to achieve the best bandwidth and performance in the channel of communication of a wireless gigabit system of transmission in the terahertz range. The physical simulation of the ultra high-speed shaper based on multifrequency multiplexing of the modulated OFDM digital streams has been carried out, bench tests and optimization have been carried out to achieve the maximum bandwidth of the digital data transmission channel in the Ethernet format using the developed software. The developed software and hardware allowed for the first time to reach the overall channel speed with a full duplex up to 1.2 Gb / s. On the basis of the generalization of the results of theoretical research and experimental work, the analysis of the existing radio relay element base, the design of the main nodes of the receiving and transmitting parts of a telecommunication system with a gigabit throughput in the frequency range 130-134 GHz, the structural scheme of the transmitting and receiving system of the system is developed: frequency mixer with subharmonic pumping, the heterodyne, which uses a highly stable reference quartz oscillator with a subsequent chain of multiplication and under power stage, bandpass filter using a thin metal plate in the E-plane of the waveguide channel 1.6x0.8 mm, horn antenna. It is presented the results of experimental studies of the main nodes of the receiving and transmitting parts of a telecommunication system with a gigabit throughput in the frequency range 130-134 GHz. Scientific novelty of the work consists in generalization and development of the theory of distribution, generation and measurement of terahertz signals, in the development of the method of multiple frequency multiplexing and generation of modulated OFDM digital streams in the terahertz frequency range and the development of the principles of functional design of the receiving and transmitting parts of a telecommunication system with a gigabit throughput in terahertz frequency range

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Section: постановка задачі дослідженняunclassified

Терагерцові Технології В Телекомунікаційних Системах. Частина 1. Обґрунтування Частотного Діапазону, Проектування Функціональних Вузлів Телекомунікаційних Систем Терагерцового Діапазону

Авдєєнко¹,

Бунін²,

Наритник³

2018

aktt

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“…Therefore, one of the options for realizing the potential of IR-UWB signals at greater distances between the corresponding REDs, than can be ensured due to the presence of restrictions on the spectral density of radiation power in the range of 3.1…10.6 GHz, can be the option of using IR-UWB of signals as a carrier of information in the THz WCS. At the same time, the IR-UWB signal generation in the transmitter of the RED directly in THz is possible either by the method of photon mixing of optical signals on a special photodiode or by radio electronics methods by frequency heterodyning of the IR-UWB signal generated in the microwave range into the THz range [5][6][7][8]. Reception of the THz signal can be realized based on the use of receivers of direct amplification or superheterodyne reception.…”

Section: Introductionmentioning

confidence: 99%

Impulse ultrawideband wireless communication system of the terahertz frequency band

Avdeyenko,

Narytnyk,

Butko

2023

ПТ

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The article considers the possibility of developing a wireless telecommunication system of the terahertz band (THz), in which an impulse radio ultrawideband signal (IR-UWB) is used as an information carrier. Variants of the transmission and reception path constructions of the THz IR-UWB wireless communication system (WCS) are considered, taking into account the technical characteristics of the THz devices available on the telecommunication market. One of the main results is the block diagram of the IR-UWB WCS of the terahertz range development of the point–to–point type based on the heterodyning method. It is also important that already existing technical implementations of some THz blocks (subharmonic mixer, waveguides, antennas, etc.) of the transmitter and receiver devices allow us to determine which devices of the WCS require designing. The calculation of the energy budget of the THz IR-UWB WCS line for various types of IR-UWB signal modulation was also carried out, which made it possible to estimate the distance between corresponding stations under different conditions of the electromagnetic wave propagation environment. The proposed version of the radio communication system is of the point-to-point type using IR-UWB signal in the terahertz range. An assessment of the potential distance between the corresponding line-of-sight stations for different conditions of EMF propagation and types of performed IR-UWB modulation was carried out, which shows that for the ideal case of EMF propagation with an increase in the operating frequency, an increase in distance is observed, which is obviously because energy losses EMF in free space with increasing frequency is compensated by increasing the directivity of the transmitting and receiving antennas.

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“…Recently, THz and sub-THz frequencies have gained pop-ularity for high throughput communication channels at locations where the laying of fiber-optic cable is difficult or impossible. THz frequency range is between 100 GHz and 10 THz [4], [5], and its electromagnetic wave in this frequency band has the characteristics of transient, broadband, low energy, strong penetration and easy to be absorbed by polar molecules [6]. Consequently, Terahertz communication is in the stage of rapid development.…”

Section: Introductionmentioning

confidence: 99%

A Novel Adaptive Terahertz System for Reliable and Efficient Maritime Communications Under Hostile Sea Conditions

Feng

Pan

et al. 2022

IEEE Access

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Terahertz (THz) frequency band has been widely used in indoor, outdoor and space communications due to its advantage of large available bandwidth. However, limited research has been conducted to apply THz technique in maritime communications as hostile sea conditions cause significant path loss, thus leading to unacceptable signal error rate. In this paper, we propose a novel adaptive THz maritime communication system to tackle the above-mentioned challenge. Specifically, we design a joint source-channel coding scheme by using system random linear network coding (sRLNC) and Reed-Solomon (RS) to ensure transmission reliability. To further improve the transmission efficiency, we propose a novel triple-channel communication architecture facilitated by a very high frequency (VHF) feedback channel. With this design, the source data can be transmitted via the THz main channel while the coding redundancy is dispatched in the auxiliary channel. Meanwhile, the feedback channel allows sender to use an adaptive mechanism to achieve the transmission efficiency with higher transmission rate over long communication distance. In addition, we adopt the Doppler frequency offset in maritime environment to compensate both relative movement between communication parties and adversarial maritime factors, e.g., strong wind and extreme sea states. Simulation results demonstrate that our proposed THz system has remarkable capability not only to improve the communication efficiency up to 20Gbps compared to those conventional high frequency (HF), VHF and millimeter wave communication systems but also to transmit data over a longer distance with lower BERs.

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Terahertz Range Telecommunication Systems

Cited by 16 publications

References 0 publications

Impulse ultrawideband wireless communication system of the terahertz frequency band

A Novel Adaptive Terahertz System for Reliable and Efficient Maritime Communications Under Hostile Sea Conditions

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