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Optical Engineering

Full duplex dense-wavelength-division-multiplexing radio-over-fiber system transmission of 75-GHz W-band frequency multiple-input multiple-output orthogonal-frequency-division-multiplexing signals with 3×12  Gbps downstream and 6 Gbps upstream
Author(s): Wei Jin Fang; Xu Guang Huang; Kai Yang; Xiao Min Zhang
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Paper Abstract

We propose and demonstrate a full duplex dense-wavelength-division-multiplexing radio-over-fiber (DWDM-ROF) system for transmitting 75-GHz W-band frequency multiple-input multiple-output orthogonal-frequency-division-multiplexing (MIMO-OFDM) signals with 12 Gbps downstream and 6 Gbps upstream. The downstream transmitting terminal is based on a three-channels sextupling-frequency scheme using an external modulation of a distributed feedback laser diode (DFB-LD) and dual drive Mach-Zehnder modulator (DD-MZM) for carrying downstream signals. MIMO-OFDM algorithms effectively compensate for impairments in the wireless link. Without using costly W-band components in the transmitter, a 12 Gbps downstream transmission system operation at 75 GHz is experimentally validated. For the downstream transmission, a power penalty of less than 3 dB was observed after a 50 km single mode fiber (SMF) and 4 m wireless transmission at a bit error rate (BER) of 3.8×10 −3 . For the upstream transmission, we use a commercially available 1.5 GHz bandwidth reflective semiconductor optical amplifier (RSOA) to achieve 6 Gbps upstream traffic for 16 QAM-OFDM signals. A power penalty of 3 dB was observed after a 50 km SMF transmission at a BER of 3.8×10 −3 . The frequency of the local oscillator is reduced due to the frequency sextupling scheme. The cost of the proposed system is largely reduced.

Paper Details

Date Published: 17 September 2012
PDF: 7 pages
Opt. Eng. 51(9) 095004 doi: 10.1117/1.OE.51.9.095004
Published in: Optical Engineering Volume 51, Issue 9
Show Author Affiliations
Wei Jin Fang, South China Normal Univ. (China)
Xu Guang Huang, South China Normal Univ. (China)
Kai Yang, South China Normal Univ. (China)
Xiao Min Zhang, South China Normal Univ. (China)


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