数字信号处理仿真系统_matlab_实验作业_数字信号处理_

function varargout = shiyan5(varargin) % SHIYAN5 MATLAB code for shiyan5.fig % SHIYAN5, by itself, creates a new SHIYAN5 or raises the existing % singleton*. % % H = SHIYAN5 returns the handle to a new SHIYAN5 or the handle to % the existing singleton*. % % SHIYAN5('CALLBACK',hObject,eventData,handles,...) calls the local % function named CALLBACK in SHIYAN5.M with the given input arguments. % % SHIYAN5('Property','Value',...) creates a new SHIYAN5 or raises the % existing singleton*. Starting from the left, property value pairs are % applied to the GUI before shiyan5_OpeningFcn gets called. An % unrecognized property name or invalid value makes property application % stop. All inputs are passed to shiyan5_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 shiyan5 % Last Modified by GUIDE v2.5 15-Jul-2020 20:58:14 % Begin initialization code - DO NOT EDIT gui_Singleton = 1; gui_State = struct('gui_Name', mfilename, ... 'gui_Singleton', gui_Singleton, ... 'gui_OpeningFcn', @shiyan5_OpeningFcn, ... 'gui_OutputFcn', @shiyan5_OutputFcn, ... 'gui_LayoutFcn', [] , ... 'gui_Callback', []); if nargin && ischar(varargin{1}) gui_State.gui_Callback = str2func(varargin{1}); end if nargout [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:}); else gui_mainfcn(gui_State, varargin{:}); end % End initialization code - DO NOT EDIT % --- Executes just before shiyan5 is made visible. function shiyan5_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 shiyan5 (see VARARGIN) % Choose default command line output for shiyan5 handles.output = hObject; % Update handles structure guidata(hObject, handles); % UIWAIT makes shiyan5 wait for user response (see UIRESUME) % uiwait(handles.figure1); % --- Outputs from this function are returned to the command line. function varargout = shiyan5_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 structure varargout{1} = handles.output; % --- Executes on selection change in xinhao. function xinhao_Callback(hObject, eventdata, handles) % hObject handle to xinhao (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 xinhao contents as cell array % contents{get(hObject,'Value')} returns selected item from xinhao % --- Executes during object creation, after setting all properties. function xinhao_CreateFcn(hObject, eventdata, handles) % hObject handle to xinhao (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 function [X,freq]=positiveFFT(x,Fs) %获得单边正向频域波形 N=length(x); %get the number of points k=0:N-1; %create a vector from 0 to N-1 T=N/Fs; %get the frequency interval freq=k/T; %create the frequency range X=fft(x)/N; % normalize the data %only want the first half of the FFT, since it is redundant cutOff = ceil(N/2); %take only the first half of the spectrum X = X(1:cutOff); freq = freq(1:cutOff); % --- Executes on button press in huitu. function huitu_Callback(hObject, eventdata, handles) % hObject handle to huitu (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) val1 = get(handles.xinhao,'value'); handles.Xmin = get(handles.edit3,'String'); %获取坐标区间 handles.Xmax = get(handles.edit4,'String'); handles.Xmin = str2num(handles.Xmin); handles.Xmax = str2num(handles.Xmax); handles.x = handles.Xmin:0.5:handles.Xmax; switch val1 case 1 handles.y = sin(handles.x); %产生正弦波 case 2 handles.y = square(handles.x); %%产生周期为2π，幅值为±1的方波 case 3 handles.y = sawtooth(handles.x,1); %%width=0.5，产生标准对称三角波; end axes(handles.axes1); plot(handles.x,handles.y); handles.y;fs=100; n=length(handles.y); T = 1/fs;%采样间隔 t = (0:n-1)*T;%时间轴 f = (0:n-1)/n*fs;%频率轴 %快速傅里叶变换 handles.yt=fft(handles.y,n)*T; handles.ytt=abs(handles.yt); axes(handles.axes2); plot(f(1:(n-1)/2),handles.ytt(1:(n-1)/2)); grid on; % fd = (handles.y); %[YfreqDomain,frequencyRange] = positiveFFT(handles.y,100); %axes(handles.axes2); %stem(frequencyRange,abs(YfreqDomain)); %grid %axis([0,20,0,1]) guidata(hObject,handles) %保存handles.y的结构体，使得handles.y在别的函数中也能用到 % --- Executes on button press in luyin. function luyin_Callback(hObject, eventdata, handles) % hObject handle to luyin (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) [handles.y,fs]=audioread('test.wav');%声音读取 handles.y = handles.y(:,1); %双通道变单通道 n=length(handles.y); T = 1/fs;%采样间隔 t = (0:n-1)*T;%时间轴 f = (0:n-1)/n*fs;%频率轴 audio_fft=fft(handles.y,n)*T; %快速傅里叶变换 handles.yf=abs(audio_fft); axes(handles.axes1); plot(t,handles.y); axes(handles.axes2); plot(f(1:(n-1)/2),handles.yf(1:(n-1)/2)); grid on; val12=get(handles.zaoshengqdu,'value');%给语音添加指定信噪比的噪声 switch val12 case 1 [handles.yn,~] = noisegen(handles.y,20); case 2 [handles.yn,~] = noisegen(handles.y,10); %加入信噪比为10dB的高斯白噪声 case 3 [handles.yn,~] = noisegen(handles.y,5); end axes(handles.axes3); plot(handles.yn); %绘图 %msgbox(num2str(snr), '信噪比'); guidata(hObject,handles) %保存handles.y的结构体，使得handles.y在别的函数中也能用到 function zsjz_Callback(hObject, eventdata, handles) % hObject handle to zsjz (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) % Hints: get(hObject,'String') returns contents of zsjz as text % str2double(get(hObject,'String')) returns contents of zsjz as a double % --- Executes during object creation, after setting all properties. function zsjz_CreateFcn(hObject, eventdata, handles) % hObject handle to zsjz (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles empty - handles not created until after all CreateFcns called % Hint: edit 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 function zsfc_Callback(hObject, eventdata, handles) % hObject handle to zsfc (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) % Hints: get(hObject,'String') returns contents of zsfc as text % str2double(get(hObject,'String')) returns contents of zsfc as a double % --- Executes during object creation, after setting all prop