OFDMA-PON with MQAM downlink for flexible allocation

doi:10.21629/JSEE.2019.06.05

Journal of Systems Engineering and Electronics ›› 2019, Vol. 30 ›› Issue (6): 1090-1095.doi: 10.21629/JSEE.2019.06.05

收稿日期:2018-05-14 出版日期:2019-12-20 发布日期:2019-12-25

OFDMA-PON with MQAM downlink for flexible allocation

Chao HE^1,²(), Ruyan WANG^1,^2,*(), Zefu TAN³(), Xiang'an TAN⁴()

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

Received:2018-05-14 Online:2019-12-20 Published:2019-12-25
Contact: Ruyan WANG E-mail:hechaoctgu@163.com;wangry@cqupt.edu.cn;tanzefu@163.com;tanxiangan@163.com
About author:HE Chao was born in 1990. He received his B.E. and Master's degrees in School of Electronic & Information Engineering from Chongqing Three Gorges University, Chongqing, China, in 2014 and 2017, respectively. He is currently pursuing his Ph.D. degree with Chongqing University of Posts and Telecommunications, Chongqing, China. His research interests mainly include FiWi broadband access network, network function virtualization, software defined network, mobile edge computing, and mobile cloud computing. E-mail: hechaoctgu@163.com|WANG Ruyan was born in 1968. He received his Ph.D. degree in 2007 from University of Electronic and Science Technology of China, and M.S. degree from Chongqing University of Posts and Telecommunications (CQUPT), China, in 1997. He is currently a full professor in CQUPT, Chongqing, China. His research interests include FiWi, network performance analysis, and multimedia information processing. E-mail: wangry@cqupt.edu.cn|TAN Zefu was born in 1969. He received his M.S. degree majored in electromagnetic field and microwave technology from Beijing University of Posts and Telecommunications in 2002, and now he is a full professor at Chongqing Three Gorges University. Currently, his research interests include hybrid optical wireless broadband access networks. E-mail: tanzefu@163.com|TAN Xiangan was born in 1972. He received his M.E. degree from Hunan University in 2009. He is a senior engineer in the Operation & Maintenance Department of Wanzhou Branch for China Unicom. His research interests include mobile software development and software engineering. E-mail: tanxiangan@163.com
Supported by:
the National Natural Science Foundation of China(61771082);the National Natural Science Foundation of China(61801065);the National Natural Science Foundation of China(61871062);the China Scholarship Council(201908500139);the Science and Technology Research Program of Chongqing Municipal Education Commission(KJQN201800615);the Science and Technology Research Program of Chongqing Municipal Education Commission(KJQN201800609);This work was supported by the National Natural Science Foundation of China (61771082; 61801065; 61871062), the China Scholarship Council (201908500139), and the Science and Technology Research Program of Chongqing Municipal Education Commission (KJQN201800615; KJQN201800609)

摘要/Abstract

Abstract:

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 of 1 024 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 parallel 4QAM or 16QAM or 64QAM OFDMA data, which are transmitted over three sub-channels, is more suitable for different sub-channel allocations, respectively. In addition, comparing with single port 4/16/64QAM OFDM over the same access system, the receiver sensitivity economizes -0.6 dBm, 0.6 dBm, 4.6 dBm at the bit error rate (BER) value of 10$^{ - 3}$ respectively.

Key words: orthogonal frequency division multiple access (OFDMA), passive optical network (PON), downlink transmission, dynamic bandwidth allocation (DBA).

. [J]. Journal of Systems Engineering and Electronics, 2019, 30(6): 1090-1095.

Chao HE, Ruyan WANG, Zefu TAN, Xiang'an TAN. OFDMA-PON with MQAM downlink for flexible allocation[J]. Journal of Systems Engineering and Electronics, 2019, 30(6): 1090-1095.

图/表 7

参考文献 34

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Description	Value
Bit rate/(Gb/s)	40
IFFT size	1 024
Three subchannels	129-384, 385-640, 641-896
Cyclic prefix	100
Training symbol	8
Fiber length/km	20
Averaged power/dBm	16
Attenuation factor/(dB/km)	0.2
CD coefficient/(ps/nm/km)	16.75
PMD coefficient/(ps/sqrt(km))	0.05

OFDMA-PON with MQAM downlink for flexible allocation

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