基于FPGA技术的数字混沌信号产生

Generation of Digital Chaotic Signals Based on FPGA Technology

为了产生数字混沌PN序列,提出了一种连续混沌的数字化技术。首先对连续的混沌系统离散化,然后在SIMULINC平台上借助于DSPBUILDER里的模块构建了该离散化混沌系统的模型,并通过MATLAB相图仿真以及QUARTUSⅡ里的时序仿真证实了设计的可行性。最后将工程中的HDL文件下载到FPGA芯片,在实验中获得了数字混沌PN序列。同时,利用D/A转换验证了这种数字化技术的精确性。

In order to achieve digital chaotic PN sequence, this paper proposes a type of digital technology for continuous system. Firstly, the continuous chaotic system is converted into discrete chaotic system, and then on the platform of SIMULINK, the model of discrete chaotic system is constructed by using the module of DSPBUILDER. Through. the simulation in MATLAB and QUARTUS Ⅱ , the design is confirmed to be feasible. Finally, the HDL file is downloaded into the FPGA, and the digital chaotic PN sequence is observed in the experimental setup. By using the D/A chip, the type of digital technology is confirmed to be accurate.