MATLAB: How to create a random variable which is exponential with a mean of 2

random variable

Hey, I need to create a signal, X, which is exponential with a mean of 2. It is transmitted through an additive Gaussian noise channel where the Gaussian noise has a mean of -1 and a variance of 4. The signal and noise are independent.
I realize I have to use randn() for the random variable but am not really sure how to get a specific mean or how to produce the Gaussian. Have been away from MatLab for awhile. Any help would be greatly appreciated. Thanks! -Will

Best Answer

if you have the statistics toolbox:
exprnd()
to roll your own
x = -2*log(rand)
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