With a half wave rectifier this is what the system produces

With a half wave rectifier, this is what the system produces:

If the system is modified to simulate a full-wave rectifier envelope detector instead of half-wave, please answer the following question:

- Comment on the time-domain signal y(t): how has the output signal changed as a result
of using a full-wave rectifier?

- Comment on the frequency-domain signals: how has the spectrum of both Srect(f) and
Y (f) changed as a result of using the full-wave rectifier?

Thank you!

% Sinusoidal signal with amplitude of 5 and freq of 300Hz

y=5*cos(2*pi*300*t);

% time vector for it to extend over

t=0:0.0001:.1;

% plot and axis properties

plot(y)

xlabel(\'time\');

ylabel(\'amplitude\');

axis([0 100 -5 5]);

title(\'Graph of function\');

Mat lab Code and graph for hello.wav:

y = wavread(\'hello.wav\');

plot(y);

xlabel(\'time\');

ylabel(\'amplitude\');

title(\'hello.wav\');

Matlab Code and Plots:

[y,Fs] = wavread(\'hidden.wav\');

plot(y);

L=length(y); % # of samples

Ts=1/Fs; %sampling period

tt=Ts*L; % total time

t=Ts:Ts:tt;

% occurs at f=300

y2 = y\'-cos(2*300*pi*t);

plot(y2)

sound(y2,Fs)

[y,Fs] = wavread(\'hidden2.wav\');

y2 = fliplr(y\');

sound(y2,Fs)

plot(y2)