# BER Test Set in OFDM systems

Good day!

In OFDM systems, the BER Test Set component takes 5 OFDM parameters into consideration for calculating bit rate and bit-error-rate:

– number of fft points;

– number of subcarriers in each OFDM symbol;

– number of cyclic prefix points;

– number of training symbols;

– number of pilot symbols.

I would like to know how these parameters are taken into consideration for calculating error. After all, all of them have to be taken care of by OFDM components themselves, so the input to BER Test Set should be a bit sequence with bits supposedly the same as those produced for transmission.

Also, BER Test Set calculates bit rate as the bit rate defined in layout parameters multiplied by “no. subcarriers in each OFDM symbol/no. fft points”. Why doesn’t this component consider cyclic prefix (which has a temporal effect on signal), training and pilot symbols when calculating bit rate?

Thank you in advance.

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