OFDMA-PON with MQAM downlink for flexible allocation  

作　　者：HE Chao WANG Ruyan TAN Zefu TAN Xiang’an 

机构地区：[1]Key Laboratory of Ubiquitous Sensing and Networking in Chongqing,Chongqing University of Posts and Telecommunications,Chongqing 400065,China [2]School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China [3]Key Laboratory of Signal and Information Processing,Chongqing Three Gorges University,Chongqing 404100,China [4]Operation&Maintenance Department of Wanzhou Branch,China Unicorn,Chongqing 404100,China

出　　处：《Journal of Systems Engineering and Electronics》2019年第6期1090-1095,共6页系统工程与电子技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(61771082; 61801065; 61871062);the China Scholarship Council(201908500139);the Science and Technology Research Program of Chongqing Municipal Education Commission(KJQN201800615;KJQN201800609)

摘　　要：In this paper, the 40-Gbps orthogonal frequency division multiple access(OFDMA) technology enabled by subcarrier allocation in the form of integrated architecture for the intra-cell is proposed in the downlink transmission passive broadband optical access system. The data-carrying subcarriers in the inverse fast Fourier transform/fast Fourier transform(IFFT/FFT) size of1 024 points are successfully divided into three sub-channels,in which each sub-channel has 256 useful subcarriers, by using adaptive dynamic bandwidth allocation(DBA). Taking the inherent advantages of M-ary quadrature amplitude modulation(MQAM)modulation mechanism into account, the performance of the absolutely identical MQAM format over the different sub-channels for the downstream OFDMA-passive optical network(PON) is investigated based on the intensity modulation direct detection(IMDD) system by simulations. The results show that three parallel4 QAM or 16 QAM or 64 QAM OFDMA data, which are transmitted over three sub-channels, is more suitable for different sub-channel allocations, respectively. In addition, comparing with single port4/16/64 QAM OFDM over the same access system, the receiver sensitivity economizes – 0.6 d Bm, 0.6 d Bm, 4.6 d Bm at the bit error rate(BER) value of 10-3 respectively.In this paper, the 40-Gbps orthogonal frequency division multiple access(OFDMA) technology enabled by subcarrier allocation in the form of integrated architecture for the intra-cell is proposed in the downlink transmission passive broadband optical access system. The data-carrying subcarriers in the inverse fast Fourier transform/fast Fourier transform(IFFT/FFT) size of1 024 points are successfully divided into three sub-channels,in which each sub-channel has 256 useful subcarriers, by using adaptive dynamic bandwidth allocation(DBA). Taking the inherent advantages of M-ary quadrature amplitude modulation(MQAM)modulation mechanism into account, the performance of the absolutely identical MQAM format over the different sub-channels for the downstream OFDMA-passive optical network(PON) is investigated based on the intensity modulation direct detection(IMDD) system by simulations. The results show that three parallel4 QAM or 16 QAM or 64 QAM OFDMA data, which are transmitted over three sub-channels, is more suitable for different sub-channel allocations, respectively. In addition, comparing with single port4/16/64 QAM OFDM over the same access system, the receiver sensitivity economizes – 0.6 d Bm, 0.6 d Bm, 4.6 d Bm at the bit error rate(BER) value of 10-3 respectively.

关 键 词：orthogonal frequency division multiple access(OFDMA) passive optical network(PON) downlink transmission dynamic bandwidth allocation(DBA). 

分 类 号：TN9[电子电信—信息与通信工程]