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OFDM-PON系统中一种抑制峰均功率比的安全算法

Secure Algorithm for Suppressing Peak-to-Average Power Ratio in OFDM-PON Systems

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摘要

安全性低和较高的峰均功率比(PAPR)是正交频分复用无源光网络(OFDM-PON)系统所面临的主要挑战, 为此提出一种基于二维混沌加密的选择性映射(SLM)方案。该方案利用二维Logistic映射分别产生随机交织器和相位序列对OFDM信号进行加扰, 达到系统加密的同时降低PAPR的目的。仿真结果显示, 与传统SLM算法和原始光OFDM(O-OFDM)信号相比, 所提出的方案可分别获得0.5 dB和3.8 dB的PAPR抑制增益。实验证明, 7 Gbit/s 16QAM (Quadrature Amplitude Modulation) O-OFDM 加密信号可通过25 km标准单模光纤在强度调制/直接检测OFDM-PON系统中安全传输并且系统误码率性能得到改善。

Abstract

Low security and high peak-to-average power ratio (PAPR) are two major challenges for orthogonal frequency division multiplexing passive optical network (OFDM-PON) systems. This study proposes a secure selective mapping (SLM) scheme based on two-dimensional chaotic encryption. The subcarriers of OFDM signals are scrambled by the random interleavers and phase sequences generated using a two-dimensional logistic map to achieve both encryption and PAPR reduction. The simulation results show that compared with the conventional SLM and original optical OFDM (O-OFDM) signals, the proposed scheme can obtain PAPR suppression gains of 0.5 dB and 3.8 dB, respectively. The experimental results demonstrate that a 7 Gbit/s 16-quadrature-amplitude-modulation (16QAM) O-OFDM encrypted signal can be securely transmitted in the intensity modulation/direct detection OFDM-PON system through a 25-km standard single-mode fiber. Moreover, the bit error rate performance of OFDM-PON systems is considerably improved.

Newport宣传-MKS新实验室计划
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中图分类号:TN929.11

DOI:10.3788/aos201939.0506004

所属栏目:光纤光学与光通信

基金项目:国家自然科学基金(61601279, 61601277, 61501289)、国家自然科学基金国际合作重点项目(61420106011)、上海市科委重点项目(17010500400, 18511103400, 16511104100, 16YF1403900)

收稿日期:2018-12-04

修改稿日期:2018-12-28

网络出版日期:2019-01-23

作者单位    点击查看

韩梦欣:上海大学特种光纤与光接入网重点实验室, 上海先进通信与数据科学研究院, 上海 200444
吴雅婷:上海大学特种光纤与光接入网重点实验室, 上海先进通信与数据科学研究院, 上海 200444
张倩武:上海大学特种光纤与光接入网重点实验室, 上海先进通信与数据科学研究院, 上海 200444
孙彦赞:上海大学特种光纤与光接入网重点实验室, 上海先进通信与数据科学研究院, 上海 200444

联系人作者:吴雅婷(ytwu@shu.edu.cn)

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引用该论文

Han Mengxin,Wu Yating,Zhang Qianwu,Sun Yanzan. Secure Algorithm for Suppressing Peak-to-Average Power Ratio in OFDM-PON Systems[J]. Acta Optica Sinica, 2019, 39(5): 0506004

韩梦欣,吴雅婷,张倩武,孙彦赞. OFDM-PON系统中一种抑制峰均功率比的安全算法[J]. 光学学报, 2019, 39(5): 0506004

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