Eb/No AWGN channel for DVB-H simulation in Simulink

awgn channel

Hi,

I'm creating a simulator of the physical layer of DVB-H, and I'm doing tests over a Rician multipath channel concatenated with an AWGN channel.

My problem deals with the Simulink's AWGN Channel block.
One of the parameters I have to set if I want to generate the noise based on Eb/No is the "number of bits per symbol". I'm using 16QAM, so the value would be 4 bits per symbol.

I have read that in systems where coding is used, the number of bits you have to take into account is the number of "information bits", not having into account the redundancy bits added by the encoders.

I'm using both Reed-Solomon and convolutional encoders, so I think the correct value to set in bits/symbol would be

4*(RS ratio)*(Convolutional ratio)

The problem comes from the fact that the Simulink block only allows integer values for the bits/symbol field, so I can't specify the corrected value.

Does anybody know the way I have to take in order to solve that?

Thanks a lot in advance!!

simulation of awgn channel

Solved!

Hello sir, Iam srinivas from texas persuing masters in electrical engineering, can u just help in providing dvb-h simulation code and details.

hi
i want tu simulat the dvb-h in simulink !
but i have not no idea!
anybody help me plz

Hi,

I'm a master degree student in telecommunication, my thesis is related to OFDM equalization, so would you please send me this simulink simulation.

Best Regards and thank you in advance.

hi again
would you please send me this simulink simulation.
tnx

Re: awgn channel

Hi!
How you are solved this problem?
I need you help in following. I simulate DVB-T system with OFDM 2k carriers. In DVB-T system the QAM is used. After OFDM IFFT every QAM constellation point is divided on 2048 (number of carriers). After Guard interval insertion (Length of data block is increased to 2560*1) DVB-T signal is provided to a AWGN channel. In Simulink library block AWGN is need to define power of signal!Do you know that power of transmitted power i need to enter to AWGN block?
And another one question. After passing the AWGN channel to reconstruct original scale of QAM point i need to multiply on 2048 (number of IFFT points in transmitter). If i don't do this, then QAM demodulator can't demodulate signal ever then noise level very low. But then i multiply on 2048, with DVB-T signal the noise also gained on 2048 and obtained values of BER don't correspond to ETSI EN 300 744 standard.Do you have idea how to solve this problem?