論文 - 菅野 敦史
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High-Speed Coherent Transmission Using Advanced Photonics in Terahertz Bands 査読あり
Atsushi Kanno, Pham Tien Dat, Norihiko Sekine, Iwao Hosako, Tetsuya Kawanishi, Yuki Yoshida, Ken'ichi Kitayama
IEICE TRANSACTIONS ON ELECTRONICS E98C ( 12 ) 1071 - 1080 2015年12月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG
A terahertz-wave communication system directly connected to an optical fiber network is promising for application to future mobile backhaul and fronthaul links. The possible broad bandwidth in the terahertz band is useful for high-speed signal transmission as well as radio-space encapsulation to the high-frequency carrier. In both cases, the low-latency feature becomes important to enhance the throughput in mobile communication and is realized by waveform transport technology without any digital-signal-processing-basedmedia conversion. A highly precise optical frequency comb signal generated by optical modulation and the vector signal demodulation technology adopted from advanced optical fiber communication technologies help perform modulation and demodulation with impairment compensation at just the edges of the link. Terahertz wave, radio over fiber, waveform transport, coherent detection, multilevel modulation, radio on radio.
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WDM RoF-MMW and Linearly Located Distributed Antenna System for Future High-Speed Railway Communications 査読あり
Pham Tien Dat, Atsushi Kanno, Naokatsu Yamamoto, Testuya Kawanishi
IEEE COMMUNICATIONS MAGAZINE 53 ( 10 ) 86 - 94 2015年10月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
In this article, we propose dual-hop network architecture capable of providing high-speed communications to high-speed trains (HSTs). The system uses a seamless fiber-millimeter-wave system for backhaul transmission from a central station to antennas on trains, and a highspeed in-train Wi-Fi network. The system can be combined with signal processing and network control technologies to compensate for interference and the Doppler effect, and to reduce the number of handovers. It can realize seamless connectivity between the inside and outside of trains to avoid penetration loss and help organize the in-train network optimally to increase coverage and data rate. We present and discuss the possible network architecture and technologies that can help realize the proposed network. We also present a proof-of-concept demonstration on a high-performance seamless fiber-MMW system that can be applied for applications in backhaul networks. The proposed network can be an attractive solution to provide broadband services such as video on demand and high-speed mobile signals to users on HSTs.
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RADIO-ON-RADIO-OVER-FIBER: EFFICIENT FRONTHAULING FOR SMALL CELLS AND MOVING CELLS 査読あり
Pham Tien Dat, Atsushi Kanno, Tetsuya Kawanishi
IEEE WIRELESS COMMUNICATIONS 22 ( 5 ) 67 - 75 2015年10月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
A combination of fiber and radio links would be attractive for efficient fronthauling to small cells and moving cells. However, achieving connectivity by using wired-wireless media converters significantly increases system complexity, power consumption, and latency. A seamless combination of fiber and radio links in which photonics-based technologies are used to generate and transmit radiowave signals is more suitable. In this article, we present an overview of fiber-radio link combination for mobile signal transmission. We propose an efficient solution for future mobile fronthauling based on the analog transmission of mobile signals over a bidirectional seamless system. We discuss the potential as well as the challenges and perspectives of the systems applied for mobile fronthauling in small-cell-and moving-cell-based networks. We also present a proof-of-concept demonstration of the transmission of mobile signals over the system. Satisfactory performance is obtained for different high-speed advanced signals. The transmission range over fiber links and the estimated range of the radio links are sufficiently long to facilitate the practical implementation of the system. The system is scalable to include new deployments of small cells and wireless services using wavelength-division and subcarrier multiplexing techniques. It can provide a high-speed, low-latency, and flexible solution for fronthauling in new emerging wireless systems such as 5G networks.
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RADIO-ON-RADIO-OVER-FIBER: EFFICIENT FRONTHAULING FOR SMALL CELLS AND MOVING CELLS 査読あり
Pham Tien Dat, Atsushi Kanno, Tetsuya Kawanishi
IEEE WIRELESS COMMUNICATIONS 22 ( 5 ) 67 - 75 2015年10月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
A combination of fiber and radio links would be attractive for efficient fronthauling to small cells and moving cells. However, achieving connectivity by using wired-wireless media converters significantly increases system complexity, power consumption, and latency. A seamless combination of fiber and radio links in which photonics-based technologies are used to generate and transmit radiowave signals is more suitable. In this article, we present an overview of fiber-radio link combination for mobile signal transmission. We propose an efficient solution for future mobile fronthauling based on the analog transmission of mobile signals over a bidirectional seamless system. We discuss the potential as well as the challenges and perspectives of the systems applied for mobile fronthauling in small-cell-and moving-cell-based networks. We also present a proof-of-concept demonstration of the transmission of mobile signals over the system. Satisfactory performance is obtained for different high-speed advanced signals. The transmission range over fiber links and the estimated range of the radio links are sufficiently long to facilitate the practical implementation of the system. The system is scalable to include new deployments of small cells and wireless services using wavelength-division and subcarrier multiplexing techniques. It can provide a high-speed, low-latency, and flexible solution for fronthauling in new emerging wireless systems such as 5G networks.
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WDM RoF-MMW and Linearly Located Distributed Antenna System for Future High-Speed Railway Communications 査読あり
Pham Tien Dat, Atsushi Kanno, Naokatsu Yamamoto, Testuya Kawanishi
IEEE COMMUNICATIONS MAGAZINE 53 ( 10 ) 86 - 94 2015年10月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
In this article, we propose dual-hop network architecture capable of providing high-speed communications to high-speed trains (HSTs). The system uses a seamless fiber-millimeter-wave system for backhaul transmission from a central station to antennas on trains, and a highspeed in-train Wi-Fi network. The system can be combined with signal processing and network control technologies to compensate for interference and the Doppler effect, and to reduce the number of handovers. It can realize seamless connectivity between the inside and outside of trains to avoid penetration loss and help organize the in-train network optimally to increase coverage and data rate. We present and discuss the possible network architecture and technologies that can help realize the proposed network. We also present a proof-of-concept demonstration on a high-performance seamless fiber-MMW system that can be applied for applications in backhaul networks. The proposed network can be an attractive solution to provide broadband services such as video on demand and high-speed mobile signals to users on HSTs.
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Millimeter-wave LiNbO3 modulator with orthogonal-gap-embedded patch-antenna for fiber-wireless link 査読あり
Y. N. Wijayanto, A. Kanno, T. Kawanishi, H. Murata, Y. Okamura
IBP 2015 - 2015 IEEE International Broadband and Photonics Conference 23 - 26 2015年08月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Institute of Electrical and Electronics Engineers Inc.
Millimeter-wave LiNbO3 optical modulators stacked to orthogonal-gap-embedded patch-antennas on low-k dielectric substrate is proposed for fiber-wireless (Fi-Wi) links. Direct conversion from wireless millimeter-wave to lightwave signals can be achieved using the proposed device. It can be operated with no external power supply. Experimentally demonstration of Fi-Wi link for 40GHz millimeter-wave bands using the proposed device is reported and discussed. Carrier-to-noise ratio of ∼30dB can be obtained in the Fi-Wi link.
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Re-Configurable Wavelength De-Multiplexer in Wavelength Division Multiplexed Radio-over-Fiber Systems for Frequency-Modulated Continuous-Wave Signal Delivery 査読あり
Toshiaki Kuri, Atsushi Kanno, Tetsuya Kawanishi
IEICE TRANSACTIONS ON ELECTRONICS E98C ( 8 ) 849 - 856 2015年08月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG
A re-configurable wavelength de-multiplexer for wave-length-division-multiplexed (WDM) radio-over-fiber (RoF) systems, which is specially designed for delivering frequency-modulated continuous-wave (FM-CW) signals, is newly developed. The principle and characteristics of the developed de-multiplexer are described in detail. Then the de-multiplexing performances of 4-channel WDM 32-GHz-band, 8-channel WDM 48-GHz-band, and 5-channel WDM 96-GHz-band FM-CW RoF signals are evaluated with the de-multiplexer.
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Millimeter-Wave Radar Receiver Using Z-Cut LiNbO3 Optical Modulator with Orthogonal-Gap-Embedded Patch-Antennas on Low-k Dielectric Material 査読あり
Yusuf Nur Wijayanto, Atsushi Kanno, Hiroshi Murata, Tetsuya Kawanishi, Yasuyuki Okamura
IEICE TRANSACTIONS ON ELECTRONICS E98C ( 8 ) 783 - 792 2015年08月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG
A millimeter-wave radar receiver using a z-cut LiNbO3 optical modulator with orthogonal-gap-embedded patch-antennas on a low-k dielectric material is proposed. A millimeter-wave from a reflected radar signal can be received by the patch-antennas and converted directly to a lightwave through electro-optic modulation. A low-k dielectric material is used as a substrate for improving antenna gain. Additionally, an interaction length between millimeter-wave and lightwave electric fields becomes long. As a result, large modulation efficiency can be obtained, which is proportional to sensitivity of the millimeter-wave radar receiver. Optical millimeter-wave radar beam-forming can be obtained using the proposed device with meandering-gaps for controlling interaction between millimeter-wave and lightwave electric fields in electro-optic modulation. Analysis and experimentally demonstration of the proposed device are discussed and reported for 40GHz millimeter-wave bands. Optical millimeter-wave radar beam-forming in 2-D is also discussed.
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Re-Configurable Wavelength De-Multiplexer in Wavelength Division Multiplexed Radio-over-Fiber Systems for Frequency-Modulated Continuous-Wave Signal Delivery 査読あり
Toshiaki Kuri, Atsushi Kanno, Tetsuya Kawanishi
IEICE TRANSACTIONS ON ELECTRONICS E98C ( 8 ) 849 - 856 2015年08月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG
A re-configurable wavelength de-multiplexer for wave-length-division-multiplexed (WDM) radio-over-fiber (RoF) systems, which is specially designed for delivering frequency-modulated continuous-wave (FM-CW) signals, is newly developed. The principle and characteristics of the developed de-multiplexer are described in detail. Then the de-multiplexing performances of 4-channel WDM 32-GHz-band, 8-channel WDM 48-GHz-band, and 5-channel WDM 96-GHz-band FM-CW RoF signals are evaluated with the de-multiplexer.
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Performance of Uplink Packetized LTE-A Signal Transmission on a Cascaded Radio-on-Radio and Radio-over-Fiber System 査読あり
Pham Tien Dat, Atsushi Kanno, Tetsuya Kawanishi
IEICE TRANSACTIONS ON ELECTRONICS E98C ( 8 ) 840 - 848 2015年08月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG
In this paper, we propose a flexible and high-capacity front-haul link for the uplink transmission of high-speed mobile signals using a cascade of radio-on-radio (RoR) and radio-over-fiber (RoF) systems. To emulate the cases that may occur in the uplink direction, we experimentally investigate the performance of superposing an uplink bursty LTE-A signal on the cascaded system using optical packet signal transmission. The performance of systems using different types of erbium-doped fiber amplifiers (EDFAs), including a high-transient EDFA, an automatic-gain-control EDFA, and a burst-mode (BM) EDFA is evaluated and compared. We confirm that the dynamic transience of the EDFAs has a significant influence on the signal performance. By using a BM-EDFA, we confirm successful transmission of the uplink packetized LTE-A signal on the cascaded system. Both the measured error vector magnitude and the received optical power range metrics exceed the requirements. We also estimate the maximum transmission range of the RoR link, and it is confirmed that a sufficiently long range could be achieved for the applications in mobile front-haul networks.
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New Burst-Mode Erbium-Doped Fiber Amplifier with Wide Linearity and High Output Power for Uplink Analog Radio-over-Fiber Signal Transmission 査読あり
Masaki Shiraiwa, Yoshinari Awaji, Naoya Wada, Atsushi Kanno, Toshiaki Kuri, Pham Tien Dat, Tetsuya Kawanishi
IEICE TRANSACTIONS ON ELECTRONICS E98C ( 8 ) 832 - 839 2015年08月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG
We report the adaptability of the burst-mode erbium-doped fiber amplifier (BM-EDFA) for uplink transmission of sharply rising analog radio-over-fiber (RoF) signals by using long-term evolution (LTE) -Advanced format on a mobile front-haul. Recent drastically increased mobile data traffic is boosting the demand for high-speed radio communication technologies for next-generation mobile services to enhance user experience. However, the latency become increasingly visible as serious issues. Analog RoF technology is a promising candidate for a next generation mobile front-haul to realize low latency. For the uplink, an RoF signal may rise sharply in response to a burst of in-coming radio signals. We propose that a newly developed BM-EDFA is applied for such a sharply rising RoF signal transmission. The BM-EDFA that we designed using enhanced intrinsic saturation power EDF to suppress the gain transient caused by received optical power fluctuations with optical feedback. The new BM-EDFA was designed for a wider linear output power range and lower NF than the previous BM-EDFA. The observed range of received optical power satisfying an error vector magnitude of less than 8%rms achieved over 16 dB. We consider that our BM-EDFAs with wide linear ranges of output power will be a key device for the LTE-Advanced RoF uplink signal transmission via optical access networks for the next-generation mobile front-haul.
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Sub-THz radio-over-fiber signal generation using external modulation 査読あり
Tetsuya Kawanishi, Takahide Sakamoto, Atsushi Kanno
IEICE ELECTRONICS EXPRESS 12 ( 13 ) 2015年07月
記述言語：英語 出版者・発行元：IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG
This paper describes photonic technologies for millimeter-wave generation and distribution. External modulation would be useful for stable and high-quality radio-over-fiber signal generation, where frequency stability and spurious suppression are very important for radio services such as mobile communications, radio locations etc. This paper provides outline of radio-over-fiber signal generation techniques. Precise and high-speed light-wave optical modulation would play important roles for suppression of undesired spectrum components. Photonic harmonic generation would be useful for very high-frequency signals. Reciprocating optical modulators consisting of optical modulators and fiber Bragg gratings can provide optical modulation by sub-THz signals.
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Sub-THz radio-over-fiber signal generation using external modulation 査読あり
Tetsuya Kawanishi, Takahide Sakamoto, Atsushi Kanno
IEICE ELECTRONICS EXPRESS 12 ( 13 ) 2015年07月
記述言語：英語 出版者・発行元：IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG
This paper describes photonic technologies for millimeter-wave generation and distribution. External modulation would be useful for stable and high-quality radio-over-fiber signal generation, where frequency stability and spurious suppression are very important for radio services such as mobile communications, radio locations etc. This paper provides outline of radio-over-fiber signal generation techniques. Precise and high-speed light-wave optical modulation would play important roles for suppression of undesired spectrum components. Photonic harmonic generation would be useful for very high-frequency signals. Reciprocating optical modulators consisting of optical modulators and fiber Bragg gratings can provide optical modulation by sub-THz signals.
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Mode-division multiplexed W-Band RoF transmission for higher-order spatial multiplexing
N. P. Diamantopoulos, S. Inudo, Y. Yoshida, A. Maruta, A. Kanno, P. T. Dat, T. Kawanishi, R. Maruyama, N. Kuwaki, S. Matsuo, K. Kitayama
Conference on Optical Fiber Communication, Technical Digest Series 2015- 2015年06月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：Institute of Electrical and Electronics Engineers Inc.
20Gb/s seamless 2×2 MIMO transmission of W-Band millimeter-wave signals over a 30-km modal-dispersion-compensated mode-division multiplexed link and a 2.5-m wireless path, is demonstrated for enhancing the transmission capacity in radio-over-fiber systems.
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Fiber-wireless signal transport by terahertz waves 査読あり
Atsushi Kanno
International Conference on Advanced Technologies for Communications 2015- 766 - 769 2015年02月
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE Computer Society
In this study, a high-capacity and low-latency fiber-wireless signal transport technology in the terahertz band is discussed. An advanced optical fiber communication technology is easily adopted for high-capacity terahertz signal transmission, as well as for encapsulation of existing radio services into the terahertz carrier.
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Coherent Terahertz Wireless Signal Transmission Using Advanced Optical Fiber Communication Technology 査読あり
Atsushi Kanno, Toshiaki Kuri, Isao Morohashi, Iwao Hosako, Tetsuya Kawanishi, Yuki Yoshida, Ken-ichi Kitayama
JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES 36 ( 2 ) 180 - 197 2015年02月
記述言語：英語 掲載種別：研究論文（学術雑誌） 出版者・発行元：SPRINGER
Coherent terahertz signal transmission with multilevel modulation and demodulation is demonstrated using an optical sub-harmonic IQ mixer (SHIQM), which consists of optical components in advanced optical fiber communication technologies. An optical-frequency-comb-employed signal generator is capable of vector modulation as well as frequency tunability. Digital signal processing (DSP) adopted from the recently developed optical digital coherent communication can easily demodulate multi-level modulated terahertz signals by using electrical heterodyning for intermediate-frequency (IF) down conversion. This technique is applicable for mobile backhauling in the next-generation mobile communication technology directly connected to an optical fiber network as a high-speed wireless transmission link.
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22.4 Gbps Photonic Wireless Transmission in Single-Carrier 16-QAM Using High-Sensitivity 34 GHz Analog Photoreceiver 査読あり
T. Umezawa, K. Akahane, N. Yamamoto, A. Kanno, N. Shibagaki, T. Kawanishi
2015 OPTO-ELECTRONICS AND COMMUNICATIONS CONFERENCE (OECC) 2015年
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Low-Latency Fiber-Wireless Bridge for Flexible Fronthauling in Future Mobile Networks 査読あり
Pham Tien Dat, Atsushi Kanno, Tetsuya Kawanishi
2015 45TH EUROPEAN MICROWAVE CONFERENCE (EUMC) 1156 - 1159 2015年
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
We propose a flexible and low-latency cascaded fiber-wireless system for future mobile fronthauling using seamless combination of fiber-optic and millimeter-wave links. Successful transmission of intraband and interband carrier aggregation LTE-A signals over the system is experimentally confirmed. Satisfactory performance is achieved owing to the use of a high-quality optical millimeter-wave signal generation technique at the transmitter and a proposed high-performance self-homodyne detection at the receiver.
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1.5 mu m High Density Quantum Dots Waveguide Photodetector with Avalanche Effect 査読あり
T. Umezawa, K. Akahane, N. Yamamoto, A. Kanno, T. Kawanishi
2015 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) 2015年
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
We have fabricated a waveguide photodetector using a 1.55-mu m high-density InAs quantum dot absorption layer. A high responsivity (0.4 A/W) without using fiber coupling designs, and a large avalanche multiplication factor of over 10 could be successfully achieved.
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10-Gb/s Wireless Signal Transmission over a Seamless IM/DD Fiber-MMW System at 92.5 GHz 査読あり
Tu Lam Thanh, Vo Nguyen Quoc Bao, Pham Tien Dat, Atsushi Kanno, Tetsuya Kawanishi
2015 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC) 1364 - 1369 2015年
記述言語：英語 掲載種別：研究論文（国際会議プロシーディングス） 出版者・発行元：IEEE
In this paper, we propose a high-speed wireless signal transmission over a simple analog intensity modulation/ direct detection (IM/DD) fiber-millimeter-wave (MMW) system at 92.5 GHz. The system employs a frequency and phase stabilized optical MMW signal generation at transmitter and a simple direct detection at receiver. We confirm a successful transmission of 10Gb/s 16-QAM OFDM-based wireless signal over a seamless 8-km SMF and 27-cm 92.5-GHz wireless system. To further increase the fiber transmission range, we use a simple adaptive modulation approach. Successful transmission over 10-km single mode fiber (SMF) system is confirmed for a 8.1 Gb/s wireless signal using both 16-QAM and QPSK modulation. We also estimate the maximum transmission range for the MMW link, and it is proved that a transmission over a 1-km MMW link can be achieved. Both the confirmed fiber length and estimated MMW range are sufficiently long for future mobile front-haul systems in next generation wireless networks. The system therefore can provide a high-speed, low-latency, and flexible solution for front-hauling in new emerging wireless systems such as 5G mobile networks.
