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  1. #1
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    performance measure of a modulator

    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.

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  2. #2
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    performance measure of a modulator

    hello and thank you mathuranathan

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



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  3. #3
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    performance measure of a modulator

    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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