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performance measure of a modulator

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Hello.

I made a modulator-demodulator binary PAM in a pair of FPGAs. Now, I want to test my design to find the bit error rate (or error probability) versus SNR.

What is a correct procedure to achive a good estimation of the BER?

my method, at this time was the following.
I generated 100 random sequences of ones and zeros, I take an interval of amplitude (1 volt to 0,1 volt with a step of 0,1). Then for one amplitude I take the error average of the 100 sequences. With all the amplitudes I could build a graph.

Is that method correct? There's another "standard" method?

Thank you.
 

hello and thank you mathuranathan

I made that.... but is correct use only ONE sequence to obtain a BER estimator?
 

thank you again but still have a doubt.

First, I made a random sequence in matlab of 8192 bits of ones and zeros.
I put this sequence in the memory of my modulator.
I demodulated the sequence, count the errors and get the BER.

ok at this point.
But when I demodulated the sequence again I get a different numbers of errors, so, i get a different BER.

That's is my question. Will I have to do this several times to obtain an average of the BER?
 

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