随机信号分析与处理实验报告

1随机信号分析与处理实验题目：对音频信号的随机处理班级：0312412姓名：肖文洲学号：031241217指导老师：钱楷时间：2014年11月25日2实验目的：1、学会利用MATLAB模拟产生各类随机序列。2、熟悉和掌握随机信号数字特征估计的基本方法。3、熟悉掌握MATLAB的函数及函数调用、使用方法。4、学会在MATLAB中创建GUI文件。实验内容：1、选用任意一个音频信号作为实验对象，进行各种操作并画出信号和波形。2、操作类型：（1）、概率密度；（2）、希尔伯特变换；（3）、误差函数；（4）、randn;（5）、原始信号频谱；（6）、axis；（7）、原始信号；（8）、normpdf;（9）、unifpdf;（10）、unifcdf;（11）、raylpdf;（12）、raylcdf;（13）、exppdf;3（14）、截取声音信号的频谱；（15）、expcdf;（16）、periodogram;（17）、weibrnd;（18）、rand;（19）、自相关函数；（20）、截取信号的均方值。实验步骤：1、打开MATLAB软件，然后输入guide创建一个GUI文件。2、在已经创建好的GUI文件里面穿件所需要的.fig面板（以学号姓名格式命名）。入下图所示：图为已经创建好的.fig面板43、右击“概率密度”，查看回调，然后点击“callback”.在相应的位置输入程序。然后点击运行，出现下图：4、依次对后续操作方式进行类似的操作。5、当完成所有按键的“callback”后，出现的均为上图。实验程序：functionvarargout=xiaowenzhou(varargin)%XIAOWENZHOUM-fileforxiaowenzhou.fig%XIAOWENZHOU,byitself,createsanewXIAOWENZHOUorraisestheexisting%singleton*.%%H=XIAOWENZHOUreturnsthehandletoanewXIAOWENZHOUorthehandleto%theexistingsingleton*.%%XIAOWENZHOU('CALLBACK',hObject,eventData,handles,...)callsthelocal%functionnamedCALLBACKinXIAOWENZHOU.Mwiththegiveninputarguments.5%%XIAOWENZHOU('Property','Value',...)createsanewXIAOWENZHOUorraisesthe%existingsingleton*.Startingfromtheleft,propertyvaluepairsare%appliedtotheGUIbeforexiaowenzhou_OpeningFunctiongetscalled.An%unrecognizedpropertynameorinvalidvaluemakespropertyapplication%stop.Allinputsarepassedtoxiaowenzhou_OpeningFcnviavarargin.%%*SeeGUIOptionsonGUIDE'sToolsmenu.ChooseGUIallowsonlyone%instancetorun(singleton).%%Seealso:GUIDE,GUIDATA,GUIHANDLES%Edittheabovetexttomodifytheresponsetohelpxiaowenzhou%LastModifiedbyGUIDEv2.502-Dec-201423:14:41%Begininitializationcode-DONOTEDITgui_Singleton=1;gui_State=struct('gui_Name',mfilename,...'gui_Singleton',gui_Singleton,...'gui_OpeningFcn',@xiaowenzhou_OpeningFcn,...'gui_OutputFcn',@xiaowenzhou_OutputFcn,...'gui_LayoutFcn',[],...'gui_Callback',[]);ifnargin&&ischar(varargin{1})gui_State.gui_Callback=str2func(varargin{1});endifnargout[varargout{1:nargout}]=gui_mainfcn(gui_State,varargin{:});elsegui_mainfcn(gui_State,varargin{:});end%Endinitializationcode-DONOTEDIT%---Executesjustbeforexiaowenzhouismadevisible.functionxiaowenzhou_OpeningFcn(hObject,eventdata,handles,varargin)6%Thisfunctionhasnooutputargs,seeOutputFcn.%hObjecthandletofigure%eventdatareserved-tobedefinedinafutureversionofMATLAB%handlesstructurewithhandlesanduserdata(seeGUIDATA)%varargincommandlineargumentstoxiaowenzhou(seeVARARGIN)%Choosedefaultcommandlineoutputforxiaowenzhouhandles.output=hObject;%Updatehandlesstructureguidata(hObject,handles);%UIWAITmakesxiaowenzhouwaitforuserresponse(seeUIRESUME)%uiwait(handles.figure1);%---Outputsfromthisfunctionarereturnedtothecommandline.functionvarargout=xiaowenzhou_OutputFcn(hObject,eventdata,handles)%varargoutcellarrayforreturningoutputargs(seeVARARGOUT);%hObjecthandletofigure%eventdatareserved-tobedefinedinafutureversionofMATLAB%handlesstructurewithhandlesanduserdata(seeGUIDATA)%Getdefaultcommandlineoutputfromhandlesstructurevarargout{1}=handles.output;%---Executesonbuttonpressinpushbutton1.functionpushbutton1_Callback(hObject,eventdata,handles)[y,Fs,bits]=wavread('Íõ·Æ.wav');y=y(1:5000);N=length(y);i=1:N;[f,i]=ksdensity(y);plot(i,f);grid;xlabel('x');ylabel('f(x)');axis();title('¸ÅÂÊÃܶÈ');%hObjecthandletopushbutton1(seeGCBO)%eventdatareserved-tobedefinedinafutureversionofMATLAB%handlesstructurewithhandlesanduserdata(seeGUIDATA)7%---Executesonbuttonpressinpushbutton2.functionpushbutton2_Callback(hObject,eventdata,handles)x=wavread('Íõ·Æ.wav');x=x(20000:40000);y=hilbert(x);y=real(y);plot(x);%hObjecthandletopushbutton2(seeGCBO)%eventdatareserved-tobedefinedinafutureversionofMATLAB%handlesstructurewithhandlesanduserdata(seeGUIDATA)%---Executesonbuttonpressinpushbutton3.functionpushbutton3_Callback(hObject,eventdata,handles)x=wavread('Íõ·Æ.wav');x=randn(500,1);plot(x);%hObjecthandletopushbutton3(seeGCBO)%eventdatareserved-tobedefinedinafutureversionofMATLAB%handlesstructurewithhandlesanduserdata(seeGUIDATA)%---Executesonbuttonpressinpushbutton4.functionpushbutton4_Callback(hObject,eventdata,handles)x=wavread('Íõ·Æ.wav');y=erf(x);plot(y);%hObjecthandletopushbutton4(seeGCBO)%eventdatareserved-tobedefinedinafutureversionofMATLAB%handlesstructurewithhandlesanduserdata(seeGUIDATA)%---Executesonbuttonpressinpushbutton5.functionpushbutton5_Callback(hObject,eventdata,handles)x=wavread('Íõ·Æ.wav');plot(x);axis([05000-0.010.01]);%hObjecthandletopushbutton5(seeGCBO)%eventdatareserved-tobedefinedinafutureversionofMATLAB%handlesstructurewithhandlesanduserdata(seeGUIDATA)%---Executesonbuttonpressinpushbutton6.8functionpushbutton6_Callback(hObject,eventdata,handles)x=wavread('Íõ·Æ.wav');x=x(20000:40000);plot(x);%hObjecthandletopushbutton6(seeGCBO)%eventdatareserved-tobedefinedinafutureversionofMATLAB%handlesstructurewithhandlesanduserdata(seeGUIDATA)%---Executesonbuttonpressinpushbutton7.functionpushbutton7_Callback(hObject,eventdata,handles)x=wavread('Íõ·Æ.wav');x=-6:0.01:7;y=normpdf(x,1,2);plot(y);%hObjecthandletopushbutton7(seeGCBO)%eventdatareserved-tobedefinedinafutureversionofMATLAB%han