基于混沌的保密通信和波形识别的应用研究

发布时间：2018-09-17 17:26

【摘要】：当今信息时代,信息传输安全和大数据信息处理能力是人们关注的两大问题。激光混沌能对信息在物理层实现加密,实现简单、实时性好；基于混沌激光储备池的计算,具有高带宽、处理能力强等优点,因此,本论文针对混沌激光保密双向通信和基于混沌的波形识别进行了研究,论文主要完成如下工作。(1)设计了混沌激光保密双向通信系统,利用混沌发射机和混沌接收机的数学模型以及光纤信道的模型,选取参数,仿真实现了双向混沌激光保密通信,正、反向传输的信息速率均为1.25 Gb/s,传输距离10km,正反向恢复信息的Q因子分别为2.2和2.1。建立了混沌激光保密双向通信实验系统,基于三只参数相近的激光器和单一光纤信道实验实现了双向混沌激光保密通信；当两方向信息的传输速率均为1.25 Gb/s时,保密通信传输距离达25 km,正、反向恢复信息的Q因子分别为2.1和2.0,具有较好的保密通信质量。(2)研究了Mackey-Glass非线性方程在其内部参数p和η取不同值时的工作状态, 仿真了非线性系统在不同工作状态下波形识别的效果,根据波形识别的结果选定了Mackey-Glass非线性方程的参数。将储备池中虚拟节点个数由50个增加到100个,对正弦波和方波的识别进行了仿真研究,得到NRMSE值为0.22。在完成了正弦波和方波的识别后,对不同相位的正弦波和不同频率的正弦波进行了仿真识别,所得的NRMSE值分别为0.18和0.15。(3)研究了光电振荡非线性方程在其内部参数取不同值时的工作状态,仿真了非线性方程的反馈系数分别为1和4时波形识别的结果,得出了当系统在周期振荡状态下加入待识别数据时所得的识别结果会很好的结论。将储备池中虚拟节点个数由50个增加到100个对正弦波和方波的识别进行了仿真研究,所得的NRMSE值为0.15。在完成了正弦波和方波的识别后,对不同相位的正弦波和不同频率的正弦波进行了仿真识别,所得的NRMSE值分别为0.13和0.14。
[Abstract]:In the information age, the security of information transmission and big data's ability to deal with information are two major problems that people pay attention to. Laser chaos can encrypt the information in the physical layer, which is simple and real-time. The calculation of laser reserve cell based on chaos has the advantages of high bandwidth and strong processing power. In this paper, chaotic laser secure two-way communication and chaotic waveform recognition are studied. The main work of this thesis is as follows. (1) A chaotic laser secure two-way communication system is designed. By using the mathematical model of chaotic transmitter and chaotic receiver and the model of optical fiber channel, the bidirectional chaotic laser secure communication is simulated. The information rate of reverse transmission is 1. 25 Gb/s, transmission distance is 10 km, the Q factor of positive and backward recovery information is 2. 2 and 2. 1 respectively. A chaotic laser secure bidirectional communication system is established, which is based on three lasers with similar parameters and a single fiber channel experiment. When the transmission rate of the information in both directions is 1. 25 Gb/s, The transmission distance of secure communication is up to 25 km,. The Q factor of reverse-recovery information is 2.1 and 2.0, respectively, which has better secure communication quality. (2) the working state of Mackey-Glass nonlinear equation with different internal parameters p and 畏 is studied, and the nonlinear system is simulated in different working conditions. The effect of waveform recognition in the state, According to the result of waveform recognition, the parameters of Mackey-Glass nonlinear equation are selected. The number of virtual nodes in the reserve cell is increased from 50 to 100, and the recognition of sinusoidal and square waves is simulated. The NRMSE value is 0.22. After the sinusoidal wave and square wave are identified, the sinusoidal wave with different phases and different frequencies are identified by simulation. The NRMSE values obtained are 0.18 and 0.15 respectively. (3) the working state of the nonlinear equation with different internal parameters is studied, and the results of waveform recognition are simulated when the feedback coefficient of the nonlinear equation is 1 and 4, respectively. It is concluded that the recognition results are very good when the system adds the data to be identified in the state of periodic oscillation. The number of virtual nodes in the reserve cell is increased from 50 to 100 to simulate the recognition of sinusoidal and square waves. The NRMSE value obtained is 0.15. After the sinusoidal wave and square wave are identified, the sinusoidal waves with different phases and different frequencies are simulated, and the NRMSE values are 0.13 and 0.14, respectively.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN918;O415.5

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