基于稀疏傅里叶变换的电子通信网络弱信号捕获系统  

Electronic communication network weak signal acquisition system based on sparse Fourier transform

作　　者：徐桂敏 杨正祥[2] XU Guimin;YANG Zhengxiang(School of Physics and Mechanical&Electrical Engineering,Hubei University of Education,Wuhan 430205,China;School of Intelligent Manufacturing,Wuhan Technical College of Communications,Wuhan 430065,China)

机构地区：[1]湖北第二师范学院物理与机电工程学院,湖北武汉430205 [2]武汉交通职业学院智能制造学院,湖北武汉430065

出　　处：《现代电子技术》2021年第19期19-23,共5页Modern Electronics Technique

基　　金：2019年湖北省教育科学规划重点课题:应用型本科院校电气自动化专业“卓越计划2.0”实施路径研究(2019GA056);湖北工业大学工程技术学院教研项目:应用型本科院校电气类课程线上线下混合式“金课”建设(X2019005)。

摘　　要：由于传统的电子通信网络弱信号捕获系统对捕获因子P的精准度要求高,导致捕获误差大、捕获速度慢,严重影响了通信网络接收机的定位时间。在快速傅里叶变换的电子通信网络弱信号捕获系统的基础上,采用不需要进行亚线性运算的稀疏傅里叶变换,设定新的捕获系统,分别引入信号采集器、控制器、处理器、积分器和低通滤波器构成系统的硬件结构,通过频域重排、窗函数滤波、哈希映射、频域降采样、定位、估值等运行步骤实现捕获过程。实验结果表明,与传统的捕获系统相比,基于稀疏傅里叶变换的电子通信网络弱信号捕获系统运行效率能够提升2倍以上,很好地满足电子通信网络对信号捕获提出的要求。Since the weak signal acquisition systems of the traditional electronic communication networks require high accuracy of acquisition factor P,the acquisition error of the systems is large and their acquisition speed is slow,which seriously affects the positioning time of the communication network receiver.On the basis of the electronic communication network weak signal acquisition system based on the fast Fourier transform,a new acquisition system is set up by the sparse Fourier transform without sublinear operation.The signal collector,controller,processor,integrator and low⁃pass filter are introduced to compose the system hardware.The acquisition process is achieved by the frequency domain rearrangement,window function filtering,Hash mapping,frequency domain downsampling,positioning,value estimation and other operational steps.The experimental results show that,in comparison with the traditional acquisition systems,the operation efficiency of the weak signal acquisition system based on sparse Fourier transform can be increased by more than 200%,which meets the requirements of the electronic communication network for signal acquisition.

关 键 词：弱信号捕获 电子通信网络 稀疏傅里叶变换 硬件设计 软件设计 实验分析 

分 类 号：TN927-34[电子电信—通信与信息系统] TN915.02[电子电信—信息与通信工程]