On Jul 18, 2007, at 4:53 PM, Kshitij Kumar Singh wrote:
As a part of some research work on cooperative communications in
wireless networks, I had decided to use
the USRP as one the of my implementation platforms. I used the
tutorials by D. Shen as a reference. There are, however , some
specific problems I need help with :
----------------------------------------------------------------------
-----------------
I need to store the received signal A/D samples (before all the
post-demod processing stuff takes place) in memory and to
correlate them with similar samples stored somewhere else in memory.
do you want the raw A/D samples? this would have to be a hardware
solution (pinout to the FPGA). However, If you just want the samples
that are coming across the USB (these samples have been decimated and
filtered) , then you can do a simple write to a file
fg = gr.flow_graph()
src = usrp.souce()
snk = gr.file_sink_c(...)
fg.connect(src,snk)
then you can do what you want with the data offline
Once this initial processing is done, I can move on to the demod
part. The sample storage/correlation part is where I am
getting stuck time and again. Is there some specific block I am
going to need or do I need to write my own signal processing block
from scratch?
I tried looking in the mailing list archives but
couldn't find anything similar. Kindly point to any suitable
reference on this topic I may have overlooked.
---------------------------------
Sincerely,
Kshitij
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