๎Data Communication Labโ04
Date:4/8/2010๎
Objective๎๎
The๎objective๎of๎this๎lab๎is๎to๎understand๎the๎concepts๎of๎band,๎bandwidth๎and๎data๎rate๎
Generating๎Sine๎Waves๎
First,๎we๎will๎define๎a๎signal๎which๎is๎a๎2๎Hz๎sine๎wave๎over๎the๎interval๎[0,1]๎seconds:๎
>> t = [0:.01:1]; % independent (time) variable
>> A = 8; % amplitude
>> f_1 = 2; % create a 2 Hz sine wave lasting 1 sec
>> s_1 = A*sin(2*pi*f_1*t);
A 4 Hz sinewave with the same amplitude will also be defined:
>> f_2 = 4; % create a 4 Hz sine wave lasting 1 sec
>> s_2 = A*sin(2*pi*f_2*t);
%plot the 2 Hz sine wave in the top panel๎๎
figure๎๎
subplot(3,1,1)๎๎
plot(t, s_1)๎๎
title('2 Hz sine wave')
ylabel('Amplitude')
%plot the 4 Hz sine wave in the middle panel
subplot(3,1,2)
plot(t, s_2)
title('4 Hz sine wave')
ylabel('Amplitude')
%plot the summed sine waves in the bottom panel
subplot(3,1,3)
plot(t, s_1+s_2)
title('Summed sine waves')
ylabel('Amplitude')
xlabel('Time (s)')
The result should look like the figure shown below.
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