I am working with the OFDM and FEC blocks combined in the same flowgraph, but this configuration led to some issues and I am not being able to sort this out.
I am using the OFDM Transmitter and Receiver Hier Blocks and FEC Encoder and Decoder, but I already used "FEC Extended Decoder/Encoder" with convolutional and dummy variables. With the following parameters:
OFDM:
* FFT Length: 64
* CP Lenght: 16
* Packet Length: 96
FEC (Repetition)
* Frame Bits: 2048
* Repetitions: 2
* a prior prob: 500m
I have made individual tests using this configuration and each block works perfectly fine. But apparently there is a bug with their integration
Then, I created file sinks in the flowgraph for debugging: One just after the encoder, to show me how the repetition encoder works and if it's working properly; other after the receiver, to look into the packet after all OFDM process.
where between transmission and reception.