【数字信号处理】基于matlab GUI手机信号频谱+时域分析【含Matlab源码 1042期】
一、获取代码方式
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二、数字信号处理系统简介
理论知识参考文献:基于GUI的《数字信号处理》教学演示系统的设计
基于Matlab GUI界面的数字信号处理辅助教学系统
基于MATLAB的数字信号处理实验平台
三、部分源代码
function varargout = shuangyinpin(varargin)
% SHUANGYINPIN MATLAB code for shuangyinpin.fig
% SHUANGYINPIN, by itself, creates a new SHUANGYINPIN or raises the existing
% singleton*.
%
% H = SHUANGYINPIN returns the handle to a new SHUANGYINPIN or the handle to
% the existing singleton*.
%
% SHUANGYINPIN('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in SHUANGYINPIN.M with the given input arguments.
%
% SHUANGYINPIN('Property','Value',...) creates a new SHUANGYINPIN or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before shuangyinpin_OpeningFcn gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to shuangyinpin_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 shuangyinpin
% Last Modified by GUIDE v2.5 30-Nov-2011 22:51:30
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @shuangyinpin_OpeningFcn, ...
'gui_OutputFcn', @shuangyinpin_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 shuangyinpin is made visible.
function shuangyinpin_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 shuangyinpin (see VARARGIN)
% Choose default command line output for shuangyinpin
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes shuangyinpin wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line.
function varargout = shuangyinpin_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 button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
a=get(handles.edit1,'String');
a=strcat(a,'1');
set(handles.edit1,'String',a);
Fs=8000;
n=(0:511);
FFTN=1024;
snr=0;
amp=sqrt(2*10^(snr/10));
f1=697;
f2=1209;
x=amp*(sin(2*pi*f1/Fs*n)+sin(2*pi*f2/Fs*n));
fx=fft(x,FFTN);
axes(handles.axes1)
plot(x,'LineWidth',1.5);
xlabel('n');ylabel('x(n)');title('时域波形');
axes(handles.axes2)
plot((0:FFTN/2-1)/FFTN*Fs/1000,abs(fx(1:FFTN/2)),'LineWidth',1.5);
xlabel('kHz');title('幅频波形');
sound(x);
axes(handles.axes3);
specgram(x,512,Fs,512);
% --- Executes on button press in pushbutton2.
function pushbutton2_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
Fs=8000;
n=(0:511);
FFTN=1024;
snr=0.989;
a=get(handles.edit1,'String');
a=strcat(a,'2');
set(handles.edit1,'String',a);
amp=sqrt(2*10^(snr/10));
f1=697;
f2=1336;
x=amp*(sin(2*pi*f1/Fs*n)+sin(2*pi*f2/Fs*n));
sound(x);
fx=fft(x,FFTN);
axes(handles.axes1);plot(x,'LineWidth',1.5);
xlabel('n');ylabel('x(n)');title('时域波形');
axes(handles.axes2);plot((0:FFTN/2-1)/FFTN*Fs/1000,abs(fx(1:FFTN/2)),'LineWidth',1.5);
xlabel('kHz');title('幅频特性');
axes(handles.axes3);
specgram(x,512,Fs,512);
% --- Executes on button press in pushbutton3.
function pushbutton3_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton3 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
a=get(handles.edit1,'String');
a=strcat(a,'3');
set(handles.edit1,'String',a);
Fs=8000;
n=(0:511);
FFTN=1024;
snr=0;
amp=sqrt(2*10^(snr/10));
f1=697;
f2=1447;
x=amp*(sin(2*pi*f1/Fs*n)+sin(2*pi*f2/Fs*n));
sound(x);
fx=fft(x,FFTN);
axes(handles.axes1);plot(x,'LineWidth',1.5);
xlabel('n');ylabel('x(n)');title('时域波形');
axes(handles.axes2);plot((0:FFTN/2-1)/FFTN*Fs/1000,abs(fx(1:FFTN/2)),'LineWidth',1.5);
xlabel('kHz');title('幅频特性');
axes(handles.axes3);
specgram(x,512,Fs,512);
% --- Executes on button press in pushbutton4.
function pushbutton4_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton4 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
a=get(handles.edit1,'String');
a=strcat(a,'A');
set(handles.edit1,'String',a);
Fs=8000;
n=(0:511);
FFTN=1024;
snr=0;
amp=sqrt(2*10^(snr/10));
f1=697;
f2=633;
x=amp*(sin(2*pi*f1/Fs*n)+sin(2*pi*f2/Fs*n));
sound(x);
fx=fft(x,FFTN);
axes(handles.axes1);plot(x,'LineWidth',1.5);
xlabel('n');ylabel('x(n)');title('时域波形');
axes(handles.axes2);plot((0:FFTN/2-1)/FFTN*Fs/1000,abs(fx(1:FFTN/2)),'LineWidth',1.5);
xlabel('kHz');title('幅频特性');
axes(handles.axes3);
specgram(x,512,Fs,512);
% --- Executes on button press in pushbutton5.
function pushbutton5_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton5 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
a=get(handles.edit1,'String');
a=strcat(a,'4');
set(handles.edit1,'String',a);
Fs=8000;
n=(0:511);
FFTN=1024;
snr=0;
amp=sqrt(2*10^(snr/10));
f1=770;
f2=1290;
x=amp*(sin(2*pi*f1/Fs*n)+sin(2*pi*f2/Fs*n));
sound(x);
fx=fft(x,FFTN);
axes(handles.axes1);plot(x,'LineWidth',1.5);
xlabel('n');ylabel('x(n)');title('时域波形');
axes(handles.axes2);plot((0:FFTN/2-1)/FFTN*Fs/1000,abs(fx(1:FFTN/2)),'LineWidth',1.5);
xlabel('kHz');title('幅频特性');
axes(handles.axes3);
specgram(x,512,Fs,512);
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四、运行结果
五、matlab版本及参考文献
1 matlab版本
2014a
2 参考文献
[1] 沈再阳.精通MATLAB信号处理[M].清华大学出版社,2015.
[2]高宝建,彭进业,王琳,潘建寿.信号与系统——使用MATLAB分析与实现[M].清华大学出版社,2020.
[3]王文光,魏少明,任欣.信号处理与系统分析的MATLAB实现[M].电子工业出版社,2018.
[4]高彦彦,张晶,李莉,贾英茜.基于GUI的《数字信号处理》教学演示系统的设计[J].教育教学论坛. 2019,(48)
[5]李俊,张淑玲,帅晶.基于Matlab GUI界面的数字信号处理辅助教学系统[J].信息通信. 2020,(08)
[6]朱御康.基于MATLAB的数字信号处理实验平台[J].通信电源技术. 2021,38(03)
文章来源: qq912100926.blog.csdn.net,作者:海神之光,版权归原作者所有,如需转载,请联系作者。
原文链接:qq912100926.blog.csdn.net/article/details/118088614
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