Buffer size

GNU Radio
1

Hi

I ran OFDM transmitter in the grc example using 1024 point fft.
following error was raised after running the grc. Please help to get out
of this error…

thread[thread-per-block[7]: <block tagged_stream_mux (47)>]: Buffer too
small for min_noutput_items

Thanks in advance

Regards

Sreena

2

Hi Sreena,

a quick search in the subjects of the mailing list yielded this thread:
http://lists.gnu.org/archive/html/discuss-gnuradio/2014-01/msg00439.html

The problem is that the complete PDU has to fit into the buffer, and it
seems that doesn’t work.
Now, with the moderate length of 64, this works out of the box, but 1024
will lead to packets that are just too long.
That being said, it’s not impossible to implement OFDM with larger FFT
lengths in GNU Radio, but you’d have to change the architecture of the
example drastically.

Greetings,
Marcus