Quantification of MDL-induced signal degradation in MIMO-OFDM   mode-division multiplexing systems

doi:10.1364/OE.24.018948

CORC > 北京大学 > 信息科学技术学院

	Quantification of MDL-induced signal degradation in MIMO-OFDM mode-division multiplexing systems
	Tian, Yu ; Li, Juhao ; Zhu, Paikun ; Wu, Zhongying ; Chen, Yuanxiang ; He, Yongqi ; Chen, Zhangyuan
刊名	OPTICS EXPRESS
	2016
关键词	MAXIMUM-LIKELIHOOD DETECTION DEPENDENT LOSS FIBER TRANSMISSION COMPLEXITY
DOI	10.1364/OE.24.018948
英文摘要	Mode-division multiplexing (MDM) transmission over few-mode optical fiber has emerged as a promising technology to enhance transmission capacity, in which multipleinput-multiple-output (MIMO) digital signal processing (DSP) after coherent detection is used to demultiplex the signals. Compared with conventional single-mode systems, MIMO-MDM systems suffer non-recoverable signal degradation induced by mode-dependent loss (MDL). In this paper, the MDL-induced signal degradation in orthogonal-frequency-division-multiplexing (OFDM) MDM systems is theoretically quantified in terms of mode-average error vector magnitude (EVM) through frequency domain norm analysis. A novel scalar MDL metric is proposed considering the probability distribution of the practical MDM input signals, and a closed-form expression for EVM measured after zero-force (ZF) MIMO equalization is derived. Simulation results show that the EVM estimations utilizing the novel MDL metric remain unbiased for unrepeated links. For a 6 x 100 km 20-mode MDM transmission system, the estimation accuracy is improved by more than 90% compared with that utilizing traditional condition number (CN) based MDL metric. The proposed MDL metric can be used to predict the MDL-induced SNR penalty in a theoretical manner, which will be beneficial for the design of practical MIMO-MDM systems. (C) 2016 Optical Society of America; National Basic Research Program of China (Program 973) [2014CB340105, 2014CB340101]; National Natural Science Foundation of China (NSFC) [61377072, 61275071, 61505002]; China Postdoctoral Science Foundation (CPSF) [2015M580926, 2016T90015]; SCI(E); ARTICLE; juhao_li@pku.edu.cn; 17; 18948-18959; 24
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/457529]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Tian, Yu,Li, Juhao,Zhu, Paikun,et al. Quantification of MDL-induced signal degradation in MIMO-OFDM mode-division multiplexing systems[J]. OPTICS EXPRESS,2016.
APA	Tian, Yu.,Li, Juhao.,Zhu, Paikun.,Wu, Zhongying.,Chen, Yuanxiang.,...&Chen, Zhangyuan.(2016).Quantification of MDL-induced signal degradation in MIMO-OFDM mode-division multiplexing systems.OPTICS EXPRESS.
MLA	Tian, Yu,et al."Quantification of MDL-induced signal degradation in MIMO-OFDM mode-division multiplexing systems".OPTICS EXPRESS (2016).