Thanks David,
I was looking to store the decimated samples(Would be quite a
problem storing raw samples at 64 MHz :) coming in through the USB.) This
is definitely helpful.
@Zhifeng , I was working on some cooperative communications protocol
(honestly, just a fancy multi-hop prototype) where the samples received from
the transmitter and the relay could be utilized towards providing a better
SNR at the receiver , hopefully, by forming a virtual antenna array (of
sorts).
Regards,
Kshitij
On 7/19/07, zhifeng chen <[EMAIL PROTECTED]> wrote:
Hi Kshitij,
I am considering the channel estimation by pilot. So, it may very like
what you want. Could you give more detail what is your target?
Is there any one have experience on the real time channel estimation (with
pilot) on GNU Radio?
2007/7/18, David Scaperoth <[EMAIL PROTECTED]>:
>
>
> 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
> >
> >
> > _______________________________________________
> > Discuss-gnuradio mailing list
> > Discuss-gnuradio@gnu.org
> > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>
>
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