As the subject states, how have you detected packets in your packet based gnu radio SDR?
The only example I have come across is Tom's OFDM packet detect in the digital examples folder. There, he uses an OFDM specific block to generate the trigger signal for the Header/Payload demux.
My use case is very basic. I have a QPSK radio that I am using to measure the performance of different source codes. What I want to do is transmit a file (USRP N210) from the Tx and on the Rx dump the received signal into a file only after detection of the start of the file. I don't want a lot of garabage data before the file actually starts. To stop the dump, I would be happy detecting an end of file condition or using a smart preamble with the file length specified. Doesn't matter to me.
If you have any advice for my case, I would appreciate that.