基于傅里叶变换的电子通信网络信号捕获系统的设计

Design of Electronic Communication Network Signal Acquisition System Based on Fourier Transform

随着无线通信技术的不断进步,移动通信系统快速发展,电子通信系统演进基于信号处理方法升级,研究不同数学变换处理信号的方法是重要方向。利用傅里叶变换可以实现信号到频域的转换,随着移动速度的增加,时频选择通道错位主要应用环境。分数傅里叶是性能优良的时频分析工具,利用分数傅里叶变换可将信号变换到时频平面任何角度。研究阐述分数傅里叶变换理论,采用稀疏傅里叶变换并引入信号采集器和处理器等构成系统硬件结构,通过窗函数滤波、定位估值等运行步骤实现捕获过程。

With the continuous progress of wireless communication technology and the rapid development of mobile communication systems,the evolution of electronic communication systems in the past was based on the upgrading of signal processing methods.Studying different mathematical transformations on signal processing methods is an important direction.The use of Fourier transform can achieve the conversion of signals from time domain to frequency domain.With the increase of movement speed,the main application environment is the misalignment of time-frequency selection channels.Fractional Fourier transform is a high-performance time-frequency analysis tool that can transform signals to any angle in the time-frequency plane using fractional Fourier transform.The fractional Fourier transform theory is studied and expounded.The sparse Fourier transform is used to introduce the signal collector,processor and other components to form the system hardware structure.The acquisition process is realized through window function filtering,positioning and estimation and other operating steps.