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Design of millimeter-wave fiber-wireless downlink with remote local-oscillator delivery by using dual-electrode Mach-Zehnder modulators configured for optical single-sideband modulations |
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| Authors: | Ming-Tuo Zhou Jian-Guo Zhang Yan Zhang M Fujise |
| Institution: | a Wireless Communications Laboratory, National Institute of Information and Communications Technology, 20 Science Park Road, #01-08A/10 Teletech Park, Singapore 117674, Singapore b Department of Electrical, Computer and Communications Engineering, London South Bank University, 103 Borough Road, London SE1 0AA, UK c School of Engineering and Technology, Asian Institute of Technology, P.O. Box 4, Klong Luang, Pathumthani 12120, Thailand |
| Abstract: | An optical fiber-wireless system operating in millimeter-wave (MMW) bands may include numerous optical remote access points (RAPs) of which the cost is critical to implement such systems in real market. In this paper, we design an optical fiber communication system for MMW optical fiber downlink transmission with remote MMW local-oscillator (LO) delivery for intermediate frequency (IF) fiber uplink transmission. The new design is based on two dual-electrode Mach-Zehnder modulators in parallel both configured for optical single-sideband modulations. By using the proposed design, a conventional RAP can be simplified in structure to reduce the cost. Our numerical results show that, with the proposed design, 1-Gbit/s binary-phase-shift-keying (BPSK) data at a 42-GHz sub-carrier frequency can be transmitted over a 20-km standard single-mode optical fiber followed by a wireless transmission of several kilometers. Moreover, a MMW LO at 37-GHz frequency can be remotely delivered over tens of kilometers of a standard single-mode fiber with acceptable deterioration in the LO phase noise for IF uplink fiber transmission. |
| Keywords: | Optical communications Analogue optical fiber systems Mach-Zehnder modulator Optical single-sideband modulation Radio-over-fiber |
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