`Dear all,`

I have some problems regarding the simulation of OFDM

Chain to obtain the BER curve...Pls help me ..it is

very urgent. Great helps are appreciated.

1). Noise Variance & Zero Padding...- in my

understanding , we have to normalize the tranmited

bits not the symbol when plotting the BER vs EbNo

curve. Is that right?. After qpsk modulation ..we have

to do the zero padding ..this will affect the energy

of the OFDM symbol.Do we have to take this into

account , when we calculate the noise variance?. Again

the same problem with the guard interval insertion.

pls explain me the answer?

2). about the channel values of the turbo decoder.

what is the SNR value we have to use to calculate the

channel reliability values of the turbo decoder.

Thanks in advance.

sundar

I have some problems regarding the simulation of OFDM

Chain to obtain the BER curve...Pls help me ..it is

very urgent. Great helps are appreciated.

1). Noise Variance & Zero Padding...- in my

understanding , we have to normalize the tranmited

bits not the symbol when plotting the BER vs EbNo

curve. Is that right?. After qpsk modulation ..we have

to do the zero padding ..this will affect the energy

of the OFDM symbol.Do we have to take this into

account , when we calculate the noise variance?. Again

the same problem with the guard interval insertion.

pls explain me the answer?

2). about the channel values of the turbo decoder.

what is the SNR value we have to use to calculate the

channel reliability values of the turbo decoder.

Thanks in advance.

sundar