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## Homework Statement

Incoming signal has normal distribution, xmin is equal to -sigma, xman is equal to +sigma. What is the governing equation of the nonlinearity through which the signal has to be passed in order to make its pdf uniform?

## Homework Equations

http://en.wikipedia.org/wiki/Normal_distribution

## The Attempt at a Solution

I have already found out that the signal needs to be passed through erf(x/sqrt(2)), which is very relevant to the CDF of normal distribution. The problem is that I cannot find a mathematical proof.