4×4 MIMO fiber-wireless transmission based on an integrated four-channel directly modulated optical transceiver

查看全文 作　　者：DI [1]ZHANG;YAO [1]YE;LEI [2]DENG;DI [2]LI;HAIPING [2]SONG;YUCHENG [2]ZHANG;MINMING [2]ZHANG;SHU [1]WANG;DEMING [2]LIU

机构地区：[1]School of Electronic Information and Communications,Huazhong University of Science and Technology,Wuhan 430074,China;[2]Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074,China

出　　处：《Photonics Research》索引2019年第7卷第12期,共7页

基　　金：National Key Research and Development Program of China(2018YFB1800904);National Natural Science Foundation of China(61675083);Fundamental Research Funds for the Central Universities(2019kfy XMBZ033);State Key Laboratory of Advanced Optical Communication Systems and Networks(2019GZKF7) 摘　　要：In this paper, an integrated compact four-channel directly modulated analog optical transceiver is proposed and fabricated. The 3 d B bandwidth of this optical transceiver exceeds 20 GHz, and the measured spurious-free dynamic range is up to 91.2 d B · Hz^2∕3. The optical coupling efficiency(CE) is improved by using a precise submicron alignment technique for lens coupling in a transmitter optical subassembly, and the highest CE is achieved when the oblique angle of the arrayed waveguide grating using a silica-based planar lightwave circuit(AWG-PLC) in receiver optical sub assembly is set to 42°. Based on the proposed optical transceiver, we have experimentally demonstrated a 6.624 Gbit/s 4 × 4 multi-input multioutput(MIMO) 16-quadrature amplitude modulation orthogonal frequency division multiplexing(16 QAM-OFDM) radio signal over 15.5 km standard single mode fiber, together with 1.2 m wireless transmission in both an uplink and a downlink. To cope with the channel interference and noise of the fiber-wireless transmission system, a low-complexity MIMO demodulation algorithm based on lattice reduction zero-forcing(LR-ZF) is designed. In our experiment, 1.6 d B power penalty is achieved by using the proposed LR-ZF algorithm, compared to the commonly used zero-forcing algorithm.Moreover, this LR-ZF algorithm has much less complexity than the optimal maximum-likelihood sequence estimation(MLSE) at a given transmission performance. These results not only demonstrate the feasibility of the integrated optical transceiver for MIMO fiber-wireless application but also validate that the proposed LR-ZF algorithm is effective to eliminate the interference for hybrid fiber-wireless transmission. 关键词：FIBER MIMO TRANSCEIVER

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4×4 MIMO fiber-wireless transmission based on an integrated four-channel directly modulated optical transceiver

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