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  • 1.
    Pang, Xiaodan
    et al.
    DTU Technical University of Denmark, Denmark.
    Beltran, Marta
    Polytechnic University of Valencia, Spain.
    Sanchez, Jose
    Polytechnic University of Valencia, Spain.
    Pellicer, Eloy
    Polytechnic University of Valencia, Spain.
    Olmos, J. J. Vegas
    DTU Technical University of Denmark, Denmark.
    Llorente, Roberto
    Polytechnic University of Valencia, Spain.
    Monroy, Idelfonso Tafur
    DTU Technical University of Denmark, Denmark.
    Centralized Optical-Frequency-Comb-Based RF Carrier Generator for DWDM Fiber-Wireless Access Systems2014In: Journal of Optical Communications and Networking, ISSN 1943-0620, E-ISSN 1943-0639, Vol. 6, no 1, p. 1-7Article in journal (Refereed)
    Abstract [en]

    In this paper, we report on a gigabit capacity fiber-wireless system that enables smooth integration between high-speed wireless networks and dense wavelength-division-multiplexing (DWDM) access networks. By employing a centralized optical frequency comb, both the wireline and the wireless services for each DWDM user can be simultaneously supported. Besides, each baseband channel can be transparently upconverted to multiple radio-frequency (RF) bands for different wireless standards, which can be flexibly filtered at the end user to select the on-demand RF band, depending on the wireless applications. For demonstration, we transmit a 2.5 Gbit/s signal through the proposed system and successfully achieve a bit-error-rate (BER) performance well below the 7% overhead forward error correction limit of the BER of 2 x 10(-3) for both the wireline and the wireless signals in the 60 GHz band after 25 km single-mode fiber plus up to 6 m wireless distance.

  • 2.
    Pang, Xiaodan
    et al.
    RISE, Swedish ICT, Acreo. DTU Technical University of Denmark, Denmark.
    Lebedev, Alexander
    DTU Technical University of Denmark, Denmark.
    Olmos, J. J. Vegas
    DTU Technical University of Denmark, Denmark.
    Monroy, Idelfonso Tafur
    DTU Technical University of Denmark, Denmark.
    Multigigabit W-Band (75-110 GHz) Bidirectional Hybrid Fiber-Wireless Systems in Access Networks2014In: Journal of Lightwave Technology, ISSN 0733-8724, E-ISSN 1558-2213, Vol. 32, no 23, p. 3983-3990Article in journal (Refereed)
    Abstract [en]

    We experimentally demonstrate multigigabit capacity bidirectional hybrid fiber-wireless systems with RF carrier frequencies at the W-band (75-110 GHz) that enables the seamless convergence between wireless and fiber-optic data transmission systems in access networks. In this study, we evaluate the transmission performances in two scenarios: a fiber-wireless access link that directly provide high-speed connections to wireless end users, and a fiber-wireless-fiber signal relay where a high capacity wireless link can be used to bridge two access fiber spans over physical obstacles. In both scenarios, we compare the transmission performances in terms of achievable wireless distances with and without using a high-frequency electrical power amplifier at the wireless transmitter. A downlink 16-Gbit/s QPSK signal and an uplink 1.25-Gbit/s ASK signal transmission over the two implementations are experimentally evaluated in terms of bit-error-rate (BER) performance. Results show that the use of the power amplifier can extend the wireless distance from similar to 1 m to over 15 m in an indoor environment with BER performance within the7% FEC threshold.

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