基于混沌映射的OFDM-PON物理层加密及系统性能增强算法  

Physical Layer Encryption and System Per formance Enhancement Algorithm Based on Chaos Mapping in OFDM-PON

作　　者：周玉鑫 毕美华[1,2] 滕旭阳 李齐良[1] 杨学林[2] Zhou Yuxin;Bi Meihua;Teng Xuyang;Li Qiliang;Yang Xuelin(School of Commurication Engineering,Hangzhou Dianzi Uniersity,Hongzhou,Zhejiang 310018,China;State Key Laborutory of Adenced Optical Communication System and Netucorks,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]杭州电子科技大学通信工程学院,浙江杭州310018 [2]上海交通大学光纤区域网与新型光通信系统国家重点实验室,上海200240

出　　处：《光学学报》2021年第16期25-32,共8页Acta Optica Sinica

基　　金：国家自然科学基金(61906055);浙江省自然科学基金(LY20F050004,LQ19F020009);浙江省教育厅一般科研项目(Y201942093,Y201942104,Y202044258)。

摘　　要：针对正交频分复用无源光网络(OFDM-PON)算法中数据安全性低和峰值平均功率比(PAPR)高的问题,提出了一种基于三维Arnold变换和混沌Frank序列的加密算法。该算法采用基于主成分分析的保守数字混沌系统产生的混沌序列进行加密,可解决混沌序列结构和计算精度导致的退化问题。首先,将OFDM信号转换为三维信号矩阵,利用三维Arnold变换进行置乱变换,实现对数据的加密;然后,将加密数据通过混沌序列随机选择的Frank序列,以降低OFDM信号的PAPR。仿真实验结果表明,相比传统的OFDM-PON算法,本算法在互补累积分布函数的概率为10^(-3)时可将信号的PAPR约降低2.1dB,在误比特率为3.8×10^(-3)时可将接收光功率约降低1dB。In this paper,an encryption algorithm based on threedimensional Arnold transform and chaotic Frank sequence is proposed,which is used to deal with low data security and excessive peak-to-average power ratio(PAPR)in orthogonal frequency division multiplexing passive optical network(OFDM-PON)systems.The algorithm uses the chaotic sequence generated by the conservative digital chaotic system based on the principal component analysis to encrypt,which can solve the degradation problem caused by the chaotic sequence structure and calculation accuracy.First,the OFDM signal is converted into a three-dimensional signal matrix,and the three dimensional Arnold transform is used to perform scrambling transformation to realize the encryption of the data;then,the encrypted data is passed through the Frank sequence randomly selected by the chaotic sequence to reduce the PAPR of the OFDM signal.The simulation experiment results show that,compared with the traditional OFDM-PON algorithm,When the probability in the complementary cumulative distribution function is 10^(-3),the algorithm can reduce the PAPR of the signal by about 2.1 dB,and when the bit error rate is 3.8×10^(-3),the received optical power can be reduced by about 1 dB.

关 键 词：光通信 正交频分复用无源光网络 混沌加密 三维Arnold变换 主成分分析 

分 类 号：TN918.4[电子电信—通信与信息系统]