We propose different fronthaul systems for facilitating future mobile networks based on the seamless convergence of fiber-optic and wireless in millimeter-wave (mmWave) bands. First, a flexible high-performance system is proposed through an encapsulation radio signals onto converged fiber-mmWave system. A simultaneous transmission three over successfully demonstrated. Second, optical self-heterodyne demonstrated generation access high-frequency Third, high-spectral-efficiency multiple...

360-degree video content has become a pivotal component in virtual reality environments, offering viewers an immersive and engaging experience. However, streaming such comprehensive presents significant challenges due to the substantial file sizes varying network conditions. To address these challenges, view adaptive emerged as promising solution, aimed at reducing burden on capacity. This technique involves lower-quality for peripheral views while delivering high-quality specific viewport...

We propose and experimentally demonstrate a seamlessly converged radio-over-fiber (RoF) millimeter-wave system at 90 GHz for high-speed wireless signal transmission. successfully transmit demodulate standard orthogonal frequency-division multiplexing-based local access network (WLAN) signals, long term evolution eNB conformance test models, advanced signals over the system. Satisfactory transmission performance RoF 5-m 90-GHz link is achieved. The measured root-mean-square error vector...

We propose a millimeter-wave (MMW) coherent radio-over-fiber (RoF) transmission system for application to an access network with direct broadband last-mile wireless connection optical fiber network. The RoF comprises two-tone signal generator advanced modulation format high-throughput and employs digital-signal-processing-aided detection technique MMW radio, which is similar that of digital detection. As proof concept, 20-GBd quadrature phase-shift keying over 20 km before radio m air...

A combination of fiber and radio links would be attractive for efficient fronthauling to small cells moving cells. However, achieving connectivity by using wired-wireless media converters significantly increases system complexity, power consumption, latency. seamless in which photonics-based technologies are used generate transmit radiowave signals is more suitable. In this article, we present an overview fiber-radio link mobile signal transmission. We propose solution future based on the...

In this article, we propose dual-hop network architecture capable of providing high-speed communications to trains (HSTs). The system uses a seamless fiber-millimeterwave for backhaul transmission from central station antennas on trains, and highspeed in-train Wi-Fi network. can be combined with signal processing control technologies compensate interference the Doppler effect, reduce number handovers. It realize connectivity between inside outside avoid penetration loss help organize...

To develop highly reliable fixed wireless links, such as mobile backhaul and fronthaul systems, it is essential to evaluate the link budget under extreme weather conditions. In this paper, we presented a evaluation for links using radio signals at four different carrier frequencies: 75.375, 85.375, 275, 400 GHz. As examples of conditions, focused on storms which can be defined combination high temperature, violent rain, strong winds. A theoretical model was proposed attenuation by wind...

We designed and fabricated a 100-GHz range integrated photoreceiver with zero-bias operational uni-traveling-carrier photodiode pseudomorphic high electron mobility transistor amplifier, which performed the roles of photonic power generation RF signal generation. Using photoreceiver, data rate radio- power-over-fiber transmission through multicore fiber communication was demonstrated. Subsequently, bit error 1×10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...

We demonstrate the first fiber–millimeter-wave–fiber system in 100-GHz band using a low-loss optical modulator and direct photonic down-conversion technology. The utilization of for conversion millimeter-wave signal to an significantly simplifies radio receiver because it includes only front-end modulator. In addition, by adopting technology simultaneous detection microwave band, fiber–radio subsequent digital processing can be considerably simplified. Using proposed technologies, we...

We discuss and propose millimeter-wave linear cell systems for signal distribution on railway radiocommunication between train trackside, a foreign object debris detection system airport runways using the radio-over-fiber network technology. Linear configurations based wavelength-division multiplexing (WDM) power-splitter-based networks are discussed demonstrated experimentally. A single-sideband modulation data transmission in an intermediate frequency over fiber is successfully transmitted...

We propose a flexible and high-performance fronthaul system for future mobile networks using seamless combination of fiber-optic millimeter-wave (MMW) systems. The proposed employs high-quality optical MMW signal generation at the transmitter stable self-homodyne detection receiver. In downlink direction, successful transmission intraband interband carrier aggregation (CA) long-term evolution-advanced (LTE-A) signals over is experimentally confirmed. also confirm satisfactory performance...

This paper reviews our recent research activities on seamless fiber-wireless systems for future mobile networks, including: radio-on-radio-over-fiber; signal processing-aided multiple transmission; high-capacity system; and simultaneous power- radio-over-fiber.

Mobile transport networks will play a vital role in future 5G and beyond networks. In particular, access connecting radio with core are of critical importance. They be required to support massive connectivity, super high data rates, real-time services ubiquitous environment. To attain these targets, should constructed on the basis variety technologies methods, depending application scenarios, geographic areas, deployment models. this article, we present several technologies, including analog...

In terms of theory and practice, microfinance activities have affirmed their role in promoting job creation increasing income for the poor. This study focuses on analyzing impact employment poor Vietnam through financial intermediary services social services. Based theoretical framework, author conducted a direct survey 300 people who received loans production business past 5 years. The area was identified as three provinces mountainous region Northwest - with most difficult economic...

In this paper, we present the design concept and performance evaluation results of a newly developed DWDM Radio over Free-Space Optics (RoFSO) system capable transmitting multiple wireless service signals simultaneously. The is evaluated 1-km free-space transmission under effects atmospheric turbulence attenuation. Effectiveness proposed tracking scheme used to mitigate beam angle-of-arrival (AOA) effect viability communication using specially designed optical antenna are illustrated....

In this paper, the free vibration of functionally sandwich grades plates with stiffeners is investigated by using finite element method. The material properties are assumed to be graded in thickness direction a power-law distribution. Based on third-order shear deformation theory, governing equations motion derived from Hamilton's principle. A parametric study carried out highlight effect distribution, stiffener parameters characteristics plates.

We developed a high-speed and handover-free communication network for trains (HSTs) using an ultrafast switchable wavelength-division multiplexing fiber-wireless backhaul system in the W band. successfully transmitted approximately 20-Gb/s 10-Gb/s signals over switched links downlink uplink directions, respectively. An radio-cell switching of less than 10 μs was experimentally demonstrated both directions. Moreover, possibility connecting central station to many remote radio cells evaluated,...

A linear-cell-based radio-over-fiber (LC-RoF) system is proposed and demonstrated for efficient mobile communication in high-speed trains without hard handover processes. The configuration of the LC-RoF network possible router architectures are discussed field trial test advanced systems future. Via network, 90-GHz, millimeter-wave radio access between ground a train car operated centralized manner. resulting throughput 1.5 Gbit/s achieved test, which comprised 250-Mbaud four-subcarrier...

Millimeter wave fixed wireless systems in future backhaul and access network applications can be affected by weather conditions. The losses caused rain attenuation antenna misalignment due to wind-induced vibrations have greater impacts on the link budget reduction at E-band frequencies higher. current International Telecommunications Union Radiocommunication Sector (ITU-R) recommendation has been widely used estimate attenuation, recent Asia Pacific Telecommunity (APT) report provides model...

Achieving high data rate with simple system configuration and low power consumption is of great interest in short-reach intensity-modulation direct-detection (IM-DD) fiber links for future datacenter networks, business local area networks so forth. For external modulation-based IM-DD, recently remarkable modulator performance has been achieved terms 3dB bandwidth, exploiting different materials/platforms. However, due to the relatively-high RF-to-RF (or end-to-end) signal loss, optical...

A direct reception of a sub-THz signal and its conversion to the microwave band is demonstrated using an all-optical receiver photonic downconversion technology. An 80-Gb/s OFDM was transmitted over converged fiber–sub-THz–fiber system at 151.5-GHz.

We demonstrate 12-Gbaud QPSK signal transmission in a fiber-wireless link and compare modulator-based optical two-tone generator an heterodyning with free-running lasers. The obtained frequency fluctuation of the system meets requirements radio regulations.

Fiber-wireless transmission in the terahertz-wave band as well millimeter-wave is key for a seamless integration of radio and optical networks physical layer. Advanced fiber communication technology enables high precision direct waveform transfer between domains. For realization conversion, an optical-terahertz converter configured with heterodyning optical-to-terahertz conversion. Analog modulation techniques by input signal intermediate frequency component after downconversion are utilized...

We propose an ultrahigh speed indoor communication network using a novel cross spectrum and medium of optical fiber, millimeter-wave (mmWave), wireless communications. As proof concept demonstration, 40-Gb/s mmWave signal in the 100-GHz band was successfully transmitted over seamless fiber-optical system. The proposed system can provide low-latency, spectral energy-efficient, cost-effective solution for future beyond 5G or 6G evolution.