数字信号处理虚拟仿真综合实验平台的设计  

Design of Comprehensive Experiment Platform for Digital Signal Processing on Virtual Simulation

作　　者：周城旭[1] 王冬霞[1] 曹玉东[1] 曹洪奎[1] ZHOU Cheng-xu;WANG Dong-xia;CAO Yu-dong;CAO Hong-kui(School of Electronics&Information Engineering,Liaoning University of Technology,Jinzhou 121001,China)

机构地区：[1]辽宁工业大学电子与信息工程学院,辽宁锦州121001

出　　处：《辽宁工业大学学报（自然科学版）》2021年第1期5-10,共6页Journal of Liaoning University of Technology(Natural Science Edition)

基　　金：辽宁省科学事业公益研究基金(20170056)。

摘　　要：给出了一种数字信号处理虚拟仿真综合实验平台,实现云端做实验。该实验平台采用LabVIEW模块化编程设计,包括信号采集模块、时频域分析模块、滤波器设计模块和应用扩展模块4个部分。信号采集模块可实现单通道和多通道(麦克风阵列)实时信号采集;时频域分析模块对信号采集模块输出的信号进行时、频域分析;滤波器设计模块通过调整输入最优参数设计数字滤波器,实现对信号采集模块输出的带噪信号实时滤波;应用扩展模块以语音应用为主,可实现语音端点检测和麦克风阵列语音信号增强等功能。该虚拟仿真综合实验平台将数字信号处理课程中各个晦涩难懂的知识点具体化,利用语音信号处理的实际案例,实时直观展示实际信号从采集、分析到处理的全过程。该实验平台既可以用于教师的线上课堂讲解,也可用学生线下自主学习,进一步激发师生教学兴趣。At present,there is a comprehensive experiment platform for digital signal processing on virtual simulation for experimenting in the cloud.There are four parts including the acquisition module of signals,the analysis module on time-frequency domain,the filter design module,the practical extension module on the experiment platform which uses modular design on LabVIEW.On the acquisition module,the real-time signal acquisition of single channel and multi-channel(microphone array)can be realized;On the analysis module,the signals which are output from the signal acquisition module are analyzed on time-frequency domain;On the filter design module,the digital filter is designed by adjusting the optimal input parameters to realize the real-time filtering of the noisy signal output from the signal acquisition module.On the practical extension module mainly for speech application,the functions of speech endpoint detection and speech enhancement on microphone array can be realized.All difficult knowledge of the digital signal processing course is specified on the comprehensive experiment platform.The whole process of acquisition,analysis and processing is demonstrated vividly in real time by using the actual case of speech processing.The experiment platform can be used not only for teachers’online explanation in class,but also for students’offline in dependent learning.

关 键 词：LABVIEW 实验平台 麦克风阵列 MATLAB 

分 类 号：TN911[电子电信—通信与信息系统]