using the MATLAB code below generate DTMF signal for the symbols 5, 8, 3 and # clc; clear all; close all; t = -2:0.05:2; x=input('enter the input number'); fr1=697; fr2=770; fr3=852; fr4=941; fc1=1209; fc2=1336; fc3=1477; fc4=1633; y0 = sin(2*pi*fr4*t) + sin(2*pi*fc2*t); % 0 y1 = sin(2*pi*fr1*t) + sin(2*pi*fc1*t); % 1 y2 = sin(2*pi*fr1*t) + sin(2*pi*fc2*t); % 2 y3 = sin(2*pi*fr1*t) + sin(2*pi*fc3*t); % 3 y4 = sin(2*pi*fr2*t) + sin(2*pi*fc1*t); % 4 y5 = sin(2*pi*fr2*t) + sin(2*pi*fc2*t); % 5 y6 = sin(2*pi*fr2*t) + sin(2*pi*fc3*t); % 6 y7 = sin(2*pi*fr3*t) + sin(2*pi*fc1*t); % 7 y8 = sin(2*pi*fr3*t) + sin(2*pi*fc2*t); % 8 y9 = sin(2*pi*fr3*t) + sin(2*pi*fc3*t); % 9 y_start = sin(2*pi*fr4*t) + sin(2*pi*fc1*t); % * y_canc = sin(2*pi*fr4*t) + sin(2*pi*fc3*t); % # if (x==1) plot(t,y1) xlabel('time(t)') ylabel('amplitude') elseif (x==2) plot(t,y2) xlabel('time(t)') ylabel('amplitude') elseif (x==3) plot(t,y3) xlabel('time(t)') ylabel('amplitude') elseif (x==4) plot(t,y4) xlabel('time(t)') ylabel('amplitude') elseif (x==5) plot(t,y5) xlabel('time(t)') ylabel('amplitude') elseif (x==6) plot(t,y6) xlabel('time(t)') ylabel('amplitude') elseif (x==7) plot(t,y7) xlabel('time(t)') ylabel('amplitude') elseif (x==8) plot(t,y8) xlabel('time(t)') ylabel('amplitude') elseif (x==9) plot(t,y9) xlabel('time(t)') ylabel('amplitude') elseif (x==0) plot(t,y0) xlabel('time(t)') ylabel('amplitude') elseif (x==11) plot(t,y_start) xlabel('time(t)') ylabel('amplitude') elseif (x==12) plot(t,y_canc) xlabel('time(t)') ylabel('amplitude') else disp('enter the correct input') end
using the MATLAB code below generate DTMF signal for the symbols 5, 8, 3 and #
clc;
clear all;
close all;
t = -2:0.05:2;
x=input('enter the input number');
fr1=697;
fr2=770;
fr3=852;
fr4=941;
fc1=1209;
fc2=1336;
fc3=1477;
fc4=1633;
y0 = sin(2*pi*fr4*t) + sin(2*pi*fc2*t); % 0
y1 = sin(2*pi*fr1*t) + sin(2*pi*fc1*t); % 1
y2 = sin(2*pi*fr1*t) + sin(2*pi*fc2*t); % 2
y3 = sin(2*pi*fr1*t) + sin(2*pi*fc3*t); % 3
y4 = sin(2*pi*fr2*t) + sin(2*pi*fc1*t); % 4
y5 = sin(2*pi*fr2*t) + sin(2*pi*fc2*t); % 5
y6 = sin(2*pi*fr2*t) + sin(2*pi*fc3*t); % 6
y7 = sin(2*pi*fr3*t) + sin(2*pi*fc1*t); % 7
y8 = sin(2*pi*fr3*t) + sin(2*pi*fc2*t); % 8
y9 = sin(2*pi*fr3*t) + sin(2*pi*fc3*t); % 9
y_start = sin(2*pi*fr4*t) + sin(2*pi*fc1*t); % *
y_canc = sin(2*pi*fr4*t) + sin(2*pi*fc3*t); % #
if (x==1)
plot(t,y1)
xlabel('time(t)')
ylabel('amplitude')
elseif (x==2)
plot(t,y2)
xlabel('time(t)')
ylabel('amplitude')
elseif (x==3)
plot(t,y3)
xlabel('time(t)')
ylabel('amplitude')
elseif (x==4)
plot(t,y4)
xlabel('time(t)')
ylabel('amplitude')
elseif (x==5)
plot(t,y5)
xlabel('time(t)')
ylabel('amplitude')
elseif (x==6)
plot(t,y6)
xlabel('time(t)')
ylabel('amplitude')
elseif (x==7)
plot(t,y7)
xlabel('time(t)')
ylabel('amplitude')
elseif (x==8)
plot(t,y8)
xlabel('time(t)')
ylabel('amplitude')
elseif (x==9)
plot(t,y9)
xlabel('time(t)')
ylabel('amplitude')
elseif (x==0)
plot(t,y0)
xlabel('time(t)')
ylabel('amplitude')
elseif (x==11)
plot(t,y_start)
xlabel('time(t)')
ylabel('amplitude')
elseif (x==12)
plot(t,y_canc)
xlabel('time(t)')
ylabel('amplitude')
else
disp('enter the correct input')
end
Step by step
Solved in 1 steps with 1 images
