Demonstration of 5G Trial Service in 28 GHz Millimeter Wave using IFoF-based Analog Distributed Antenna System

Sung, Minkyu; Kim, Joon‐Young; Kim, Eon‐Sang; Cho, Seung-Hyun; Won, Young Jun; Lim, Byoung-Chul; Pyun, Sung-Yeop; Lee, Joon Ki; Lee, Jong Hyun

doi:10.1364/ofc.2019.th1f.2

Cited by 13 publications

(5 citation statements)

References 3 publications

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“…The QoS degradation of A-RoF compared to the digital solution is not presented in this paper since we focused on the beamforming design using the proposed A-RoF system. However, this issue has been widely investigated and demonstrated in our recent papers[16],[19],[35] as well as other literatures[36],[37], where it is shown that A-RoF based system is capable of supporting 5G signals with an acceptable degradation of QoS. For example in[16], we experimentally verified that the A-RoF system is capable of supporting a 2 × 2 MIMO system with less than 1 dB SNR degradation compared to the traditional system…”

mentioning

confidence: 52%

Analog Radio Over Fiber-Aided Multi-Service Communications for High-Speed Trains

Ghafoor

El‐Hajjar

2022

IEEE Open J. Commun. Soc.

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High speed trains (HST) have gradually become an essential means of transportation, where given our digital world, it is expected that passengers will be connected all the time. More specifically, the on-board passengers require fast mobile connections, which cannot be provided by the currently implemented cellular networks. Hence, in this article, we propose an analogue radio over fiber (A-RoF) aided multi-service network architecture for high-speed trains, in order to enhance the quality of service as well as reduce the cost of the radio access network (RAN). The proposed design can simultaneously support sub-6GHz as well as millimetre wave (mmWave) communications using the same architecture. Explicitly, we design a photonics aided beamforming technique in order to eliminate the bulky high-speed electronic phase-shifters and the hostile broadband mmWave mixers while providing a low-cost RAN solution. Finally, a beamforming range of 180 • is demonstrated with a high resolution using our proposed system.

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confidence: 52%

Analog Radio Over Fiber-Aided Multi-Service Communications for High-Speed Trains

Ghafoor

El‐Hajjar

2022

IEEE Open J. Commun. Soc.

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“…Since it is a commercial system, it is based on proprietary hardware and signal processing to support commercial requirements. Such high cost and great efforts of RRH design in [27] reduces the possibility for scientific MIMO research. In [28], an SDoF solution with real-time sigma-delta-modulation (SDM) is demonstrated for 22.75 GHz -27.5 GHz carrier frequency range.…”

Section: Local Oscillationmentioning

confidence: 99%

“…In this way, the RRH recovers mmWave by a photodetector, but the complexity of the CU is high. One of the more mature mm-Wave MIMO systems is reported in [27] and demonstrated during the 2018 PyeongChang Winter Olympics with a 1 GHz bandwidth at…”

Section: Introductionmentioning

confidence: 99%

Flexible mm-Wave Sigma-Delta-Over-Fiber MIMO Link

Bao

Ponzini

Fager

2023

J. Lightwave Technol.

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Millimeter-wave and multiple-input-multiple-output (MIMO) technologies combine broad bandwidth with spatial diversity to offer a greater data rate. This paper investigates a flexible millimeter-wave sigma-delta-over-fiber based transmitter solution with digital beamforming MISO and MIMO functionality. Those functions are controlled by a central unit connecting a remote radio head with a standardized QSFP28 fiber link. The central unit generates binary encoded intermediate frequency signals using bandpass sigma-delta modulation. The QSFP28 based fiber link transmits the intermediate frequency bitstreams to the remote radio head. The remote radio head consists of a QSFP28 module, 90°hybrids, and upconverters. The remote radio head feeds four parallel, independent, coherent, and central-unit controlled 28 GHz signals to a linear array transmitting antenna. The transmitter performance is experimentally verified, demonstrating up to 800 Msym/s at an EVM/NMSE of 6.7%/-23.5 dB when tested with a 64 quadrature amplitude modulation (64-QAM) modulation scheme. Digital overthe-air beamforming MISO functionality is demonstrated up to 700 Msym/s across 1 m wireless distance. MIMO communication capabilities is demonstrated by over-the-air transmission of two independent 500 Msym/s to two spatially separated receivers. The results show that the proposed link can be used for realization of scalable, low-cost and flexible transmitter solution for emerging distributed antenna systems.

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“…The systems in [17] [18] used 64QAM signals with a Mach-Zehnder modulator (MZM) and an external laser source to modulate the radio frequency (RF) signal to the optical domain, which results in high system complexity. The MIMO demonstration of [19] is based on an intermediate-frequencyover-fiber (IFoF) architecture with off-the-shelf hardware. A bandpass sigma-delta-over-fiber (SDoF) MIMO architecture is reported in [20] with medium complexity, but the results were limited by the 10 Gbps data rate of the fiber connection and phase noise of the radio.…”

Section: Introductionmentioning

confidence: 99%

Wideband mm-wave Spectrum-Efficient Transmitter Using Low-Pass Sigma–Delta-Over-Fiber Architecture

Bao,

Ponzini,

Fager

2023

IEEE Microw. Wireless Tech. Lett.

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The millimeter-wave band offers large bandwidth and promises high data rates for wireless communication systems. This work proposes a millimeter-wave radio-over-fiber architecture suitable for wideband mm-wave communication, using a lowpass sigma-delta modulation approach. The central unit generates baseband sigma-delta bitstreams, in-phase/quadrature (I/Q) components, which are transported to a remote radio head (RRH) using a standard QSFP28 optical interconnect link connection. In the RRH, the baseband I/Q signals are upconverted to the millimeter-wave band, amplified, and transmitted through an antenna. The performance of the resulting sigma-delta-over-fiber transmitter architecture is experimentally verified at 28 GHz, demonstrating a state-of-the-art symbol rate up to 1.5 Gsym/s. Furthermore, in over-the-air measurements, the architecture is shown to support 1 Gsym/s with 5.9% error vector magnitude for 64/256/1024 quadrature amplitude modulation cases over a 5 m wireless distance. The results demonstrate the feasibility of the proposed architecture for the realization of wideband millimeterwave distributed antenna systems.

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Demonstration of 5G Trial Service in 28 GHz Millimeter Wave using IFoF-based Analog Distributed Antenna System

Cited by 13 publications

References 3 publications

Analog Radio Over Fiber-Aided Multi-Service Communications for High-Speed Trains

Analog Radio Over Fiber-Aided Multi-Service Communications for High-Speed Trains

Flexible mm-Wave Sigma-Delta-Over-Fiber MIMO Link

Wideband mm-wave Spectrum-Efficient Transmitter Using Low-Pass Sigma–Delta-Over-Fiber Architecture

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