Hi, thank you for your response. In fact, I still have the same error: FATAL: Missing a required length tag on port 0 at item #0 thread[thread-per-block[21]: <gr_block crc 32_bb (9)>]: Missing length tag. and UOOOOOOOOOOOOOO I put the usrp sink and usrp source 's sample rate to 1M.
What is the suitable sampling rate to put ? Thanks in advance 2014-06-30 16:36 GMT+02:00 Philip Balister <[email protected]>: > On 06/30/2014 09:20 AM, Wafa Elhajhmida wrote: > > Hi, > > > > 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, OFDM > > transmitter, channel model, throttle, USRP sink > > > > But when I executed the flow graph. It generated "UOOOOOOOOOOOOOOOOOO" > and > > I got an error : > > Slow the data rate until this message stops. Then worry about the next > message. > > Philip > > > > > FATAL: Missing a required length tag on port 0 at item #0 > > thread[thread-per-block[21]: <gr_block crc 32_bb (9)>]: Missing length > > tag. > > > > and tag debug didn't show anything. > > > > Have you an idea how to fix this error ? > > > > Thanks in advance > > > > > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > [email protected] > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > >
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