How to calculate probability of bit error for 8 coherent orthogonal multiple frequencies with waveforms

Dear Frieds, Can anyone help to calculate the probability of bit error for 8 coherent orthogonal multiple frequencies with waveform with the given parameters.

si = A cos 2πfit with i=1,2,3 ...8 and 0 ≤ t ≤ T with T = 0.2 ms

The received carrier amplitude is 1mV and the double sided AWGN, No/2 is 10^-11 W/Hz

[sixwwwwww]

Dear Nik, What is equation for calculating the probability of bit error? Can you make your question more clear so that it can be answered correctly?

[nik]

This is how the question was forwarded to me, I don't have any more details, however doing some research I found that this is the equation for calculating the the probability of bit error.

[sixwwwwww]

What is Eb? Because No = 20^-10 in your case? and also your waveform look like this?

si = A * cos(2 * pi * i * t * f);
With
A = 1;
t = 0:0.01:0.2;
i = 1:8;

Also I am confused about f? what is f here?

[Alfred]

Hello both, the actual question is: A GSM (global system mobile) network uses microwave radio to link a number of base stations together. The radios use 8 coherent orthogonal multiple frequencies with waveforms;

Si = A cos 2πfi t with i=1,2,3 ...8 and 0 ≤ t ≤ T with T = 0.2 ms

The received carrier amplitude is 1mV and the double-sided AWGN (average white Gaussian noise) No /2 is 10-11 W/Hz. Calculate the probability of bit error, state all assumptions.

I would like to know how this is solved. Appreciate your assistance.