How would do I add additive white guassian noise for an input SNR, without using the awgn() function on mat-lab?
Are there any resources available that can help me to solve my problem?
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The power of a normal distribuition (so the power of your white gaussian noise) is defined as variance ( \$\sigma_n^2\$) of the distribuition.
On MATLAB you can generate normally distributed random numbers using the function randn (see: https://www.mathworks.com/help/matlab/ref/randn.html ). Before you generate your noise it's necessary to know what's the power of your signal, in that way you know what variance you noise has to have.
