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- 实验方案
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High-Speed and Uninterrupted Communication for High-Speed Trains by Ultrafast WDM Fiber-Wireless Backhaul System
摘要： We developed a high-speed and handover-free communication network for high-speed trains (HSTs) using an ultrafast and switchable wavelength-division multiplexing fiber-wireless backhaul system in the W band. We successfully transmitted approximately 20-Gb/s and 10-Gb/s signals over the in the downlink and uplink switched fiber-wireless directions, respectively. An ultrafast radio-cell switching of less than 10 μs was experimentally demonstrated in both downlink and uplink directions. Moreover, the possibility of connecting a central station to many remote radio cells was evaluated, confirming that an uninterrupted communication network up to several tens of kilometers can be achieved for HSTs. The proposed system can overcome the current challenges in mobile networks and can provide a potential solution for the provision of advanced services to users on HSTs in future 5G and beyond networks.
关键词： high-speed train,moving cell,fiber-wireless convergence,mobile backhaul,Radio-over-fiber
更新于2025-09-04 15:30:14
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AIP Conference Proceedings [Author(s) INTERNATIONAL CONFERENCE ON INVENTIVE MATERIAL SCIENCE APPLICATIONS: ICIMA-2018 - Tamil Nadu, India (27–28 September 2018)] - An optical millimeter wave generation using carrier suppression modulation scheme based on frequency 12 tupling lithium niobate mach zehnder modulator without an optical filter
摘要： This article presents a novel method for the generation of optical millimeter wave (mmw) from a microwave signal using a single Lithium Niobate Mach Zehnder Modulator (LiNbO3 MZM). The carrier suppression scheme supports the experimental setup for achieving 12-tupling frequency by suppressing the sidebands of wave signal by fixing the modulation and bias voltage as 10V. The absence of optical filter leads to fast tuning of required frequency by the modulator which helps to achieve 12 tupling frequencies effectively. The pseudorandom bit sequence in the rate of 50 Gbps is transmitted through a single mode optical fiber for a distance of 60 km. The experiment achieves a high data rate, less complexity and better performance in the absence of an optical filter and an amplifier when compared to other conventional methods. The proposed method performs error free transmission along the fiber of length 60 km and the efficiency of the generated mmw is analyzed by using optical spectrum, RF spectrum and eye diagram visualizers. The quality factor is also included in the paper using Bit Error Rate (BER) analyzer to prove that the energy loss is negligible in the setup.
关键词： Millimeter wave generation Radio over Fiber,Optical Spectrum,Frequency 12-tupling,Lithium Niobate Mach-Zehnder modulator,Optical carrier suppression
更新于2025-09-04 15:30:14
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[IEEE 2018 IEEE 4th International Forum on Research and Technology for Society and Industry (RTSI) - Palermo, Italy (2018.9.10-2018.9.13)] 2018 IEEE 4th International Forum on Research and Technology for Society and Industry (RTSI) - Internet of Things for Environmental Monitoring Based on Radio Over Fiber
摘要： Radio over Fiber (RoF) is one of the main technologies for the next-generation access networks due to its immunity to electromagnetic interference, low latency, low power consumption and high transmission capacity. RoF enables the processing of several radio frequency (RF) signals in a centralized location, reducing both capital expenditures (CAPEX) and operating expenditures (OPEX). This paper describes a testbed of Internet-of-Things (IoT) for environmental monitoring based on RoF that is under development in the framework of the H2020 FUTEBOL project. Moreover, we assess the impact of RoF on network performance by using a new methodology oriented to real environments.
关键词： Arduino,Internet-of-Things,Experiments,Radio-over-Fiber,ZigBee
更新于2025-09-04 15:30:14