- How is it possible to transmit a file (as a signal source) repeatedly and
continously without interrupts (with gnuradio & uhd) ??
Even without the USRP (i.e. just simulating with throttle & graphical sinks and
a file source) interrupts occurs (time-periods of no samples) for each time the
file repeats (i.e. starts over from the beginning). Same thing with transmitting
with USRP as uhd-source (then without throttling of course), however no underruns
are reported.
I want to continuously send a prepared signal from a file over and over again but
can't accept the interrupts each time the file ends & starts over. This happens
even at slow sample rates and I want to transmit really fast!
I might have found a solution to this about year ago but now I can't remember
what I did... something simple...
Somehow read in the whole file into cached memory so it doesn't need to be
re-read from disk for each repetition (in Linux)... but how?
Maybe create a small ram-disk outside of GNU Radio, then copy your file to it,
then use the new path for the file source block?