DVB-S2 Simulink Simulation

[emiryuuu]

Hello, I'm simulating DVB-S2 blocks' chain with SIMULINK Matlab. I'm using DVB-S2 demo already loaded in SIMULINK libraries, I want to add to it a Raised Cosine Filter in transmitting and in receiving, but I have high values of BER, around 0.49 with ANY Es/No values.
What's Wrong?
I'm using those values about Raised Cosine Filter parameters:

Filter Type: Square Root
Group Delay: 2
Roll-off factor: 0.35
Upsampling factor: 8

Please Let me know about this issue.
Thank you so much,
Emilio.

 

[emiryuuu]

I Solved partially, Because in the LDPC Error Rate calculation block I setted a wrong delay, now 4 is the correct delay introduced by the Raised Cosine Filter. But Anyway, the BER remains too High. I.E. for Es/No = 40 dB I have 2.3e-05 BER.. too high!

I attached the model file.

what's wrong? I would have low BER values.
View attachment RCF_dvbs2_web.rar
Please help me.

 

[lequangtrung]

Hello, I'm simulating DVB-S2 blocks' chain with SIMULINK Matlab. I'm using DVB-S2 demo already loaded in SIMULINK libraries, I want to add to it a Raised Cosine Filter in transmitting and in receiving, but I have high values of BER, around 0.49 with ANY Es/No values.
What's Wrong?
I'm using those values about Raised Cosine Filter parameters:

Filter Type: Square Root
Group Delay: 2
Roll-off factor: 0.35
Upsampling factor: 8

Please Let me know about this issue.
Thank you so much,
Emilio.

Hi, Please share that code with me? trunglqvtv(at)gamil(dot)com