Can I define BER(Bit Error Rate) by using Q function as Q[(x-μ)/σ] ?
Here x is a random variable, μ is mean and σ is standard deviation.
I was solving a question on Bit error rate and I encountered this expression.
Any help will be highly appreciated. I know it is not circuits but I need some help.

 

How can we help when you haven't given a problem, let alone shown your best efforts to work it?

 

 

I solved it as follows:
Q((X-0)/1) as mean is zero and the variance is 1 for the first case. So as we can approximate the Q function I used the integration to find value of a( 6.0697).
In the second case mean is 0.3*X so the Q function becomes Q(0.7X) and I again used integration to find the BER to be 1.2*10^-4.