Hi,
I'm testing the basic packet transmission functions.
I use a vector source to generate binary stream, tag it, add crc, use a protocol formatter to generate a header and mix the header with the payload.
On the receiver end, I use a correlation estimator to do packet detection, and use header/payload demux to seperate the header and the payload. I use a message debug module and see that the header is parsed successfully.
******* MESSAGE DEBUG PRINT ********
((payload symbols . 48))
************************************
However, the header/payload demux gives me error:
gr::log :CRIT: header_payload_demux0 - no payload length passed from header data
As shown in the picture below, the correlation estimator does a good job finding the starting of a packet.
Compared to the example in /gr-digital/examples/packet/, my design does not include a polyphase clock sync. But I guess this is not the source of problem because there is no noise induced.
I hope someone can have a look at my attatched grc file, and tell me what is causing the problem. Any help would be much appreciated.
Regards,
Edwin
