(Solved Homework): MATLAB Generate the cos function from 0 to 2π. Add some random Gaussian noise to this signal, with a zero…

MATLAB Generate the cos function from 0 to 2π. Add some random Gaussian noise to this signal, with a zero mean and a standard deviation of .3. Create a plot for each of the following:
. (b) Negative values of the noisy signal. (c) Positive values of the noisy signal

Please also add the code

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(Solved Homework): MATLAB Generate the cos function from 0 to 2π. Add some random Gaussian noise to this signal, with a zero…
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Expert Answer

 

cos1.m

theta = 0:0.01:2*pi; %% vary theata from 0 to 2*pi in steps of 0.01
n = length(theta); % calucalte lenght of theta
sigma = 0.3; % standard deviation given
y = cos(theta);
% add noise
y_new = cos(theta)+ randn(1,n)*sigma;
% plot both original and noised signal in same plot
plot(theta,y ,’r’);
hold on;
plot(theta,y_new,’b’);
legend(‘cos’,’noisy cos’);

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