双音多频DTMF信号的MATLAB仿真

内容发布更新时间 : 2024/5/10 8:36:29星期一 下面是文章的全部内容请认真阅读。

end

function pushbutton8_Callback(hObject, eventdata, handles) global num_string;global bool; num_string=strcat(num_string,'8'); set,'string',num_string); if bool==0; Music(8); else

Signal(8); end

function pushbutton9_Callback(hObject, eventdata, handles) global num_string;global bool; num_string=strcat(num_string,'9'); set,'string',num_string); if bool==0; Music(9); else

Signal(9); end

function pushbutton10_Callback(hObject, eventdata, handles) global num_string;global bool; num_string=strcat(num_string,'*'); set,'string',num_string); if bool==0; Music(42); else

Signal(42); end

function pushbutton11_Callback(hObject, eventdata, handles) global num_string;global bool; num_string=strcat(num_string,'0'); set,'string',num_string); if bool==0; Music(0); else

Signal(0); end

function pushbutton12_Callback(hObject, eventdata, handles) global num_string;global bool; num_string=strcat(num_string,'#'); set,'string',num_string); if bool==0; Music(35); else

Signal(35); end

function pushbuttonCall_Callback(hObject, eventdata, handles) global bool; global num2_string; global num_string; num2_string=num_string; num_string=''; Call();

if str2num(num2_string)==10000; bool=1; Music(10000); else

Music(11); end

set,'string',num2_string); set,'string','');

function pushbuttonDown_Callback(hObject, eventdata, handles) global num_string; global music; global bool; bool=0; num_string=''; set,'string',''); set,'string',''); music=0;

function text1_CreateFcn(hObject, eventdata, handles) function text2_CreateFcn(hObject, eventdata, handles)

function y=Signal(d);

tm=[1,2,3,65; 4,5,6,66; 7,8,9,67; 42,48,35,68]; N=205; Fs=8000;

K=[18,20,22,24,31,34,38,42]; f1=[697,770,852,941]; f2=[1209,1336,1477,1633]; for p=1:4; for q=1:4; if tm(p,q)==abs(d); break;end end

if tm(p,q)==abs(d); break;end end

n=0:1023;

y = sin(2*pi*n*f1(p)/Fs) + sin(2*pi*n*f2(q)/Fs); sound(y,Fs); X=goertzel(y(1:205),K+1);

val=abs(X);

stem(K,val,'.');grid on;xlabel('k');ylabel('|X(k)|');

function v=Call(); global num2_string;

tm=[1,2,3,65; 4,5,6,66; 7,8,9,67; 42,0,35,68]; Fs=8000;

f1=[697,770,852,941];

f2=[1209,1336,1477,1633]; TN=str2num(num2_string); len=length(num2_string);

for l=1:len; d=fix(TN/10^(len-l)); TN=TN-d*10^(len-l);

for p=1:4; for q=1:4; if tm(p,q)==abs(d); break;end end

if tm(p,q)==abs(d); break;end end

n=0:1023;

y = sin(2*pi*n*f1(p)/Fs) + sin(2*pi*n*f2(q)/Fs); sound(y,Fs); pause; end

function Music(d); global music;

tm=[1,2,3,65; 4,5,6,66; 7,8,9,67; 42,0,35,68]; N=205; Fs=8000;

K=[18,20,22,24,31,34,38,42]; f1=[697,770,852,941]; f2=[1209,1336,1477,1633]; for p=1:4; for q=1:4; if tm(p,q)==abs(d); break;end end

if tm(p,q)==abs(d); break;end

end

hfile =[int2str(d),'.wav']; [y, Fs, nbits] = wavread(hfile); music=audioplayer(y,Fs); play(music);

n=0:1023;

y = sin(2*pi*n*f1(p)/8000) + sin(2*pi*n*f2(q)/8000); X=goertzel(y(1:205),K+1); val=abs(X);

stem(K,val,'.');grid on;xlabel('k');ylabel('|X(k)|'); end