Novel multi-band DFT-spread OFDM-PON systems based on intensity modulation and direct detection for cloud computing

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• 作者：Xiaoxue Gong ; Yuhuai Peng ; Yejun Liu ; Hui Li
• 刊名：Photonic Network Communications
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：31
• 期：3
• 页码：550-558
• 全文大小：1,024 KB
• 刊物主题：Computer Communication Networks; Electrical Engineering; Characterization and Evaluation of Materials;
• 出版者：Springer US
• ISSN：1572-8188
• 卷排序：31

文摘

Passive optical network (PON) has become a preferable access technique for cloud computing due to its elastic bandwidth capacity and transmission stability. In particular, the orthogonal frequency division multiplexing PON based on intensity modulation and direct detection (IM/DD OFDM-PON) has gained extensive attention since it is a cost- and spectral-efficient system, while for the traditional IM/DD OFDM-PON, the use of OFDM could lead to the high peak-to-average power ratio (PAPR), and it is impossible to satisfy the different QoS degrees required by ONUs under a cloud environment. Thus in this paper, we design a novel multi-band discrete Fourier transform (DFT)-spread IM/DD OFDM-PON. The DFT-spread is utilized to reduce the PAPR; meanwhile, a multi-band power allocation and bit loading are achieved to satisfy the different degrees of QoS requirement owned by ONUs. The simulation results show that our system has the better performance of PAPR reduction compared with the traditional IM/DD OFDM-PON; meanwhile, the different QoS degrees of all ONUs are guaranteed.KeywordsMulti-bandDFT-spreadIM/DD OFDM-PONPAPR reductionQoSCloud computing