[1] [1] Rizzo C, Sicignano D, Riazuelo L, et al. Guaranteeing Communication for Robotic Intervention in Long Tunnel Scenarios[M]. Berlin: Springer International Publishing, 2016: 691-703.

[3] [3] Liu W, Zhang Z, Feng Z. Bidirectional rectangular ring antenna for coal mine/tunnel communication[J]. Microwave and Optical Technology Letters, 2013, 55(6): 1412-1416.

[4] [4] Kwadjane J M, Vrigneau B, Langlais C, et al. Performance evaluation of max-dmin precoding in impulsive noise for train-to-wayside communications in subway tunnels[J]. EURASIP Journal on Wireless Communications and Networking, 2014, 2014(1): 1-12.

[5] [5] Zhang Jianming, Lou Shuqin, Zeng Lulu. A scheme of full duplex radio over fiber link model [J]. Infrared and Laser Engineering, 2015, 44(5): 1599-1604. (in Chinese)

[6] [6] Zhang Chan, Ning Tigang, Li Jing, et al. Single-sideband modulated radio-over-fiber system based on phase-shifted superstructure fiber Bragg grating[J]. Infrared and Laser Engineering, 2016, 45(2): 0222001. (in Chinese)

[7] [7] Li X, Yu J, Xiao J, et al. Fiber-wireless-fiber link for 128-Gb/s PDM-16QAM signal transmission W-band[J]. IEEE Photonics Technology Letters, 2014, 26(19): 1948-1951.

[8] [8] Gowda A S, Dhaini A R, Kazovsky L G, et al. Towards green optical/wireless in-building networks: Radio-over-fiber[J]. Journal of Lightwave Technology, 2014, 32(20): 3545-3556.

[9] [9] Zhu M, Zhang L, Wang J, et al. Radio-over-fiber access architecture for integrated broadband wireless services[J]. Journal of Lightwave Technology, 2013, 31(23): 3614-3620.

[10] [10] Morant M, Prat J, Llorente R. Radio-over-fiber optical polarization-multiplexed networks for 3GPP wireless carrier-aggregated MIMO provision[J]. Journal of Lightwave Technology, 2014, 32(20): 3721-3727.

[11] [11] Novak D, Waterhouse R B, Nirmalathas A, et al. Radio-over-fiber technologies for emerging wireless systems[J]. IEEE Journal of Quantum Electronics, 2016, 52(1): 1-11.

[12] [12] Pang X, Caballero A, Dogadaev A, et al. 100 Gbit/s hybrid optical fiber-wireless link in the W-band (75-110 GHz)[J]. Optics Express, 2011, 19(25): 24944-24949.

[13] [13] Dat P T, Kanno A, Yamamoto N, et al. High-capacity and high-spectral-efficiency seamless fiber-wireless system for high-speed trains[C]//Optical Fiber Communication Conference, 2016: Tu3B. 5.

[14] [14] Dat P T, Kanno A, Yamamoto N, et al. Low-latency fiber-millimeter-wave system for future mobile fronthauling[C]//SPIE, 2016: 97720D.