DOI: 10.11991/yykj.201906005 网络出版地址:http://kns.cnki.net/kcms/detail/23.1191.U.20191107.0909.002.html 滑动短时傅里叶变换的 FPGA实现 邵瑞,付永庆 哈尔滨工程大学 信息与通信工程学院,黑龙江 哈尔滨 150001 摘 要:为解决对混沌信号进行傅里叶变换分析后,只能得到信号中所包含的频率成分,并不能获知有关频率成分的时间局 部化信息的问题,采用了短时傅里叶变换的方法,通过对短时傅里叶变换的数学公式及表达的物理意义研究后,提出了在 FPGA上利用 Altera公司提供的 IP核资源实现短时傅里叶变换的功能,并在 Modelsim软件上进行功能仿真。实验证明通 过短时傅里叶变换可以对混沌信号进行很好的分析。 关键词:滑动;短时傅里叶变换;混沌;现场可编程门阵列;Modelsim;傅里叶变换;先进先出存储器;只读存储器 中图分类号:TN47 文献标志码:A 文章编号:1009−671X(2020)02−0067−05 FPGA implementation of sliding short-time Fourier transform SHAO Rui, FU Yongqing College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China Abstract: In order to solve the problem that only the frequency component contained in the signal can be obtained after Fourier transform analysis of the chaotic signal, and the time localization information about the frequency component can not be obtained, we adopted the method of short-time Fourier transform to study the mathematical formula and physical meaning of the short-time Fourier transform, and then proposed to use the information provided by Altera company on FPGA. IP core resource could realize the function of short-time Fourier transform, and carry on the function simulation in Modelsim software. The experiment verifies that the chaotic signal can be analyzed very well by short-time Fourier transform. Keywords: sliding; short