Random variable with log-normal distribution

Hi,

I need to calculate a random variable with log-normal distribution with zero mean and standard deviation of 4 dB.

How can I do this?

I've tried

lognrnd(0,16)

But can give values to high or to low., and I don't want that, it should be something like 6, 8, 2 dB I guess.

Answer 1

[Star Strider]

Try this:

v = lognrnd(0, db2mag(4), [1,7])                % Convert  4dB’ To Magnitude, Then Calculate
vdB = db(v2)                                    % Convert Results To  dB’

.

[Tariq Islam]

@ Star Strider...I am using linear scale for my simulations. Can is use "v" directly in my formula?