- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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Demonstration of a hybrid optical fibera??wireless 5G fronthaul coexisting with end-to-end 4G networks
摘要： The plethora of services envisaged to support 5G use-cases requires the development of a radio access network (RAN) infrastructure with the capability to integrate a variety of user-demanded mobile traffic characteristics. It is therefore interesting to study a 5G deployment scenario showcasing heterogeneous transmission. In order to address this challenge, in this paper, we propose and experimentally assess a coarse-wavelength-division-multiplexing-compatible optical access network for joint provisioning of 4G/5G RAN services, supporting the coexistence of both digital and analog radio-over-fiber (ARoF) fronthauling. Resorting to an integrated testbed, we demonstrate the transport of 100 MHz 5G downlink using low-latency and bandwidth-efficient ARoF over 8 km fiber, seamlessly coexisting on the same fronthaul infrastructure with a legacy full-fledged 4G long-term evolution (LTE) network supported by Ethernet-based digital RoF with different functional splits. In addition, we experimentally demonstrate the successful operation of the 4G/5G system in a hybrid fiber–wireless scenario including a free-space optics fronthaul extension with 55 m. The proposed heterogeneous RAN architecture is demonstrated to provide a flexible and robust integration path for novel 5G technologies, enabling their coexistence with currently deployed 4G LTE systems over a shared fronthaul infrastructure.
关键词： free-space optics,fronthaul,radio access network,5G,4G LTE,digital radio-over-fiber,analog radio-over-fiber
更新于2025-09-19 17:13:59
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[IEEE 2018 Asia Communications and Photonics Conference (ACP) - Hangzhou, China (2018.10.26-2018.10.29)] 2018 Asia Communications and Photonics Conference (ACP) - Bias Modulation Characteristic Analysis Using a Uni-Traveling-Carrier Photodiode
摘要： We theoretically studied the photodiode bias modulation technology. Based on one uni-traveling-carrier photodiode structure, the modulation bandwidth can reach 25 GHz at a 150 GHz subcarrier signal when the incident optical power is 12.93 dBm.
关键词： Radio-over-Fiber (RoF) links,photodiode(PD) bias modulation,uni-traveling-carrier photodiode (UTC-PD)
更新于2025-09-19 17:13:59
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OFDM tolerance to additive white Gaussian and laser phase noises in optical heterodyning systems accompanied by the feasible pilot-assisted equalization
摘要： It is well known that the performance of orthogonal frequency division multiplexing (OFDM) is limited by phase noise, which depends on the laser linewidths for coherent-detection radio over fiber (RoF) systems. In this manuscript, we present numerical and theoretical results to analyze the combined effects of phase and additive white Gaussian noises in the performance of RoF-OFDM schemes with the feasible pilot-based channel corrector. This phase-noise compensator is adopted due to its effectiveness as well as simplicity. It is shown that as the subcarrier modulation format increases, the required radio frequency linewidth for overcoming the FEC limit decreases by a factor of 10 times. Also, there is a signal–noise ratio penalty of 7 dB. Furthermore, it is demonstrated that the bit error rate enhances as the product of the laser linewidths and OFDM symbol period decreases because the pilot-assisted equalization method acts as a high-pass filter for phase noise. We finally discovered that the intermediate-frequency (IF) carrier suppression is not mandatory; the system performance is not affected by selecting properly the carrier–signal ratio and IF. To confirm the previous observation, a novel way to measure phase noise in RoF-OFDM signals accompanied by the IF carrier is proposed. The mean integral phase noise comes from the adaptation of the root mean square phase deviation of the single-carrier systems. This work serves as a guideline for the study and design of OFDM-based RoF schemes susceptible to direct and coherent detections.
关键词： Laser phase noise,Additive white Gaussian noise,Intermediate frequency suppression,Orthogonal frequency division multiplexing,Radio over fiber systems
更新于2025-09-19 17:13:59
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[IEEE 2019 International Topical Meeting on Microwave Photonics (MWP) - Ottawa, ON, Canada (2019.10.7-2019.10.10)] 2019 International Topical Meeting on Microwave Photonics (MWP) - Fiber Wireless A-RoF/IFoF Uplink of 0.4Gb/s 16-QAM and 0.6Gb/s QPSK Over a 32-Element 60GHz Phased Array Antenna for 5G Fronthaul Networks
摘要： We experimentally demonstrate an end-to-end Fiber Wireless A-RoF/IFoF fronthaul link using a 32-element 60GHz phased array antenna and characterize for the first time its linearity using two tone measurements, resulting in an 100Mbd uplink transmission of a 16-QAM signal and a 300Mdb QPSK with beamsteering of 15o degrees across 1km fiber and 1m V-band link, meeting the uplink user-rate KPI-requirements for 5G mmWave networks.
关键词： 5G,Two Tone Measurements,Analog Radio-over-Fiber,Mobile Fronthaul
更新于2025-09-16 10:30:52
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[IEEE 2019 International Workshop on Fiber Optics in Access Networks (FOAN) - Sarajevo, Bosnia and Herzegovina (2019.9.2-2019.9.4)] 2019 International Workshop on Fiber Optics in Access Networks (FOAN) - Integrated Photonic Filters for Flexible Analog-based Mobile Fronthauling
摘要： A Wavelength Division Multiplexing (WDM)-enabled analog mobile fronthaul architecture is presented supporting enhanced flexibility by exploiting the fine filtering properties of a fully reconfigurable, silicon photonics-based filtering element. The use of Photonic Integrated Circuit (PIC)-based elastic optical circuitries to support wavelength selectivity, reconfigurability and advanced signal processing at the optical edge is thoroughly discussed. Numerical studies are presented emphasizing on flexibility, low-energy consumption and the compatibility of our proposed PIC-based implementations with the analog Radio over Fiber (RoF)-based mobile transport schemes. Proof-of-concept analog photonic processing of 1 Gbaud Quadrature Phase Shift Keying (QPSK)- modulated radio through Intermediate Frequency over Fiber (IFoF) transmission experiments is successfully demonstrated.
关键词： analog optical signal processing,optical filters,silicon photonics,Analog radio-over-fiber,mobile fronthaul,wavelength division multiplexing,M-QAM
更新于2025-09-16 10:30:52
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[IEEE 2019 International Workshop on Fiber Optics in Access Networks (FOAN) - Sarajevo, Bosnia and Herzegovina (2019.9.2-2019.9.4)] 2019 International Workshop on Fiber Optics in Access Networks (FOAN) - 5th-Generation Mobile Access Networks Assisted by Integrated Microwave Photonics
摘要： This paper addresses the needs of mobile access network and presents the benefits of integrated microwave photonics for 5th-generation (5G) mobile networks. Full convergence of the optical fiber and the wireless segments in the form of microwave photonics is described. The usage of integrated microwave photonics in optically supported wireless networks can provide a high-capacity mobile system based on the micro-wave and millimeter-wave frequency bands.
关键词： millimeter wave,wireless networks,integrated microwave photonics,radio-over-fiber,cellular architecture,5th-Generation
更新于2025-09-16 10:30:52
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Optical Fiber Communications (Principles and Applications) || Radio over Fiber
摘要： Radio over Fiber (RoF) technology can integrate advantages of both wireless networks and optical fiber networks. Recently RoF technology has found numerous applications in broadband wireless access communication networks, radio astronomy, RADAR and millimeter-wave communications, antenna array beam-forming, establishment of up- and down-converting links using photonic signals, spectroscopy, imaging, and electronic warfare.
关键词： wireless networks,RoF,radio astronomy,optical fiber networks,millimeter-wave communications,antenna array beam-forming,photonic signals,broadband wireless access,electronic warfare,Radio over Fiber,spectroscopy,RADAR,imaging
更新于2025-09-12 10:27:22
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[IEEE 2019 IEEE Research and Applications of Photonics in Defense Conference (RAPID) - Miramar Beach, FL, USA (2019.8.19-2019.8.21)] 2019 IEEE Research and Applications of Photonics in Defense Conference (RAPID) - Study of 90-GHz Phased Array Antenna System Based on Chromatic Dispersion Effect in the Optical Fiber
摘要： Phased array antenna system is evaluated in the 90-GHz band using fiber-dispersion-based true time delay. Phase differences are induced by transmission of the optical fiber, without any additional equipment. Beam steering angle with a range of 5 degrees is successfully demonstrated with four horn-antenna elements.
关键词： phased array antenna,radio over fiber,fiber chromatic dispersion,millimeter-wave
更新于2025-09-11 14:15:04
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Seamless Convergence of Fiber and Wireless Systems for 5G and Beyond Networks
摘要： We propose different systems for facilitating future mobile networks based on the seamless convergence of fiber-optic and wireless systems in the millimeter-wave (mmWave) bands. First, a flexible and high-performance wireless fronthaul system is proposed through an encapsulation of radio signals onto a converged fiber–mmWave system. A simultaneous transmission of three radio signals over the system is successfully demonstrated. Second, a high-performance optical self-heterodyne system is proposed and demonstrated for the generation and transmission of radio access signals in high-frequency bands. Third, a high-spectral-efficiency optical fronthaul system for the simultaneous transmission of multiple radio signals in different frequency bands is proposed using a subcarrier-multiplexing intermediate-frequency-over-fiber system. Satisfactory performance is experimentally confirmed for the transmission of three different radio signals in the microwave and low- and high-mmWave bands. The proposed systems can overcome the challenges and bottlenecks of the current mobile fronthaul systems and can be useful in different usage scenarios of 5G and beyond networks.
关键词： mobile fronthaul,fiber-wireless convergence,Radio-over-fiber,5G and beyond networks
更新于2025-09-11 14:15:04
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[IEEE 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC) - Fukuoka, Japan (2019.7.7-2019.7.11)] 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC) - Antenna-Coupled Electrode Electro-Optic Modulator and 28 GHz-Band Wireless Signal Transfer over Fiber for 5G Mobile Systems
摘要： Signal conversion from 28 GHz-band wireless to optical signals and transfer over optical fiber were demonstrated successfully using a newly-designed antenna-coupled electrode LiNbO3 electro-optic modulator, which is suitable for uplinks in 5G mobile front-haul.
关键词： antenna,5G mobile systems,optical modulator,LiNbO3,radio-over-fiber,Microwave photonics
更新于2025-09-11 14:15:04