【信号处理】基于IIR低通+FIR高通信号时域和频谱分析含Matlab源码（信号的频域分析MATLAB实例）

【信号处理】基于IIR低通+FIR高通信号时域和频谱分析含Matlab源码（信号的频域分析MATLAB实例）

1 简介

结合数字滤波器的理论基础和设计方法,在MATLAB程序语言环境下,设计出有限长单位脉冲响应(FIR)数字滤波器,同时利用GUI界面设计FIR数字滤波器人机交互平台,该系统平台界面直观、操作简单且功能齐全,可实现对加噪语音信号的去噪滤波功能.平台主要包括语音信号、加噪信号、FIR数字滤波器设计和去噪信号四个模块,用户可根据读入的语音信号及噪声信号特点调整滤波器技术指标,实现滤波器的优化设计,最终达到FIR数字滤波器对语音信号的去噪处理效果.

2 部分代码

function varargout = program1(varargin)% PROGRAM1 MATLAB code for program1.fig% PROGRAM1, by itself, creates a new PROGRAM1 or raises the existing% singleton*.%% H = PROGRAM1 returns the handle to a new PROGRAM1 or the handle to% the existing singleton*.%% PROGRAM1('CALLBACK',hObject,eventData,handles,...) calls the local% function named CALLBACK in PROGRAM1.M with the given input arguments.%% PROGRAM1('Property','Value',...) creates a new PROGRAM1 or raises the% existing singleton*. Starting from the left, property value pairs are% applied to the GUI before program1_OpeningFcn gets called. An% unrecognized property name or invalid value makes property application% stop. All inputs are passed to program1_OpeningFcn via varargin.%% *See GUI Options on GUIDE's Tools menu. Choose "GUI allows only one% instance to run (singleton)".%% See also: GUIDE, GUIDATA, GUIHANDLES% Edit the above text to modify the response to help program1% Last Modified by GUIDE v2.5 03-Jan-2020 09:14:21% Begin initialization code - DO NOT EDITgui_Singleton = 1;gui_State = struct('gui_Name', mfilename, ... 'gui_Singleton', gui_Singleton, ... 'gui_OpeningFcn', @program1_OpeningFcn, ... 'gui_OutputFcn', @program1_OutputFcn, ... 'gui_LayoutFcn', [] , ... 'gui_Callback', []);if nargin && ischar(varargin{1}) gui_State.gui_Callback = str2func(varargin{1});endif nargout [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});else gui_mainfc结合数字滤波器的理论基础和设计方法,在MATLAB程序语言环境下,设计出有限长单位脉冲响应(FIR)数字滤波器,同时利用GUI界面设计FIR数字滤波器人机交互平台,该系统平台界面直观、操作简单且功能齐全,可实现对加噪语音信号的去噪滤波功能.平台主要包括语音信号、加噪信号、FIR数字滤波器设计和去噪信号四个模块,用户可根据读入的语音信号及噪声信号特点调整滤波器技术指标,实现滤波器的优化设计,最终达到FIR数字滤波器对语音信号的去噪处理效果.n(gui_State, varargin{:});end% End initialization code - DO NOT EDIT% --- Executes just before program1 is made visible.function program1_OpeningFcn(hObject, eventdata, handles, varargin)% This function has no output args, see OutputFcn.% hObject handle to figure% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)% varargin command line arguments to program1 (see VARARGIN)% Choose default command line output for program1handles.output = hObject;% Update handles structureguidata(hObject, handles);% UIWAIT makes program1 wait for user response (see UIRESUME)% uiwait(handles.figure1);set(handles.uipanel1,'visible','off');set(handles.uipanel2,'visible','off');% --- Outputs from this function are returned to the command line.function varargout = program1_OutputFcn(hObject, eventdata, handles) % varargout cell array for returning output args (see VARARGOUT);% hObject handle to figure% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)% Get default command line output from handles structurevarargout{1} = handles.output;% --- Executes on selection change in popupmenu1.function popupmenu1_Callback(hObject, eventdata, handles)% hObject handle to popupmenu1 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)% Hints: contents = cellstr(get(hObject,'String')) returns popupmenu1 contents as cell array% contents{get(hObject,'Value')} returns selected item from popupmenu1% --- Executes during object creation, after setting all properties.function popupmenu1_CreateFcn(hObject, eventdata, handles)% hObject handle to popupmenu1 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles empty - handles not created until after all CreateFcns called% Hint: popupmenu controls usually have a white background on Windows.% See ISPC and COMPUTER.if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor')) set(hObject,'BackgroundColor','white');end% --- Executes on button press in pushbutton1.function pushbutton1_Callback(hObject, eventdata, handles)

3 仿真结果

4 参考文献

[1]马磊, 沈晓燕. 基于MatLab的"频谱信号处理与分析"教学设计[J]. 教育(文摘版):00264-00265.

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