I implemented OFDM receiver on USRP E110 using the OFDM receiver in
examples in gnuradio’s files 3.7
and I added to it a chain to create OFDM transmitter: random source,
transmitter, channel model, throttle, USRP sink
But when I executed the flow graph. It generated “UOOOOOOOOOOOOOOOOOO”
I got an error :
FATAL: Missing a required length tag on port 0 at item #0
thread[thread-per-block: <gr_block crc 32_bb (9)>]: Missing length
and tag debug didn’t show anything.
Have you an idea how to fix this error ?
Thanks in advance