Hi all,
Has anyone here had any success with receiving 16-bit samples from the USRP2
@ 20MHz to the host without an onslaught of overruns? I did some searching
on the list and some people suggested a RAID configuration, but this is my
poor little laptop. Just wanted to get a general consensus.
Hi all,
I used the usrp1 for implementing a UHF gen2 reader(not the entire
functionality though). I have used a single board at the same frequency without
any problem. RFX900 has 2 antenna ports TX/RX and rx2 so tx and rx antennas can
be connected simultaneously.
However I found a major
George Nychis schrieb:
Hi all,
Has anyone here had any success with receiving 16-bit samples from the
USRP2 @ 20MHz to the host without an onslaught of overruns? I did some
searching on the list and some people suggested a RAID configuration,
but this is my poor little laptop. Just wanted
Hello
Can you kindly help me ?
I am new to gnu radio and gnu radio companion. I have successfully installed
grc and now i am looking for some grc example programs. I tried to run hello
program successfully , can you suggest me any link or send me any programs with
which i can get started. for
Thanks for the suggestions! I am digging the ramdisk idea... unfortunately
the laptop only has 1G of memory, but I can still get a hardy 10 second
trace out of it :) I liked the compression idea, Dan. I wonder if we can
get something that can keep up with the data rate. It seems like a
If latency and RAM usage is not an issue, increase the ethernet
packet_ring buffer (I'm normally using from 0.5 to 1 GB). I wrote a
patch some while ago and I think it is now in gnuradio, but I'm not
sure if it is in the python interface. This will probably help you
closer to the long term average
One more thing... if I take a look at the constellations between the using
the old filter and the new filter, they're different. I'm not much of a
communications person... so maybe someone can enlighten me here :)
But, this is DPSK or DBPSK... I imagined there would be two definitive
If those are the post-spread samples, then I think that makes sense. The
barker spreading code randomizes(appears) everything.
Have you tried decorrelating with the matched filter? If that results in two
tight constellations then all is good.
On Sun, Nov 22, 2009 at 10:26 PM, George Nychis
For HF work, FlexRadio has a nice line of HF hardware and they provide the
PowerSDR software that goes with it. It's possible to talk to
their hardware (last time I checked) using other software.
Yes, I'm currently steering towards a FlexRadio running custom DttSP (or
perhaps GNU Radio)
Also, a couple more questions about the USRP daughterboards (showing my
radio ignorance here!):
The BasicRX (from the schematics) looks like it's just a transformer and a
300MHz low-pass filter. Is the transformer for impedance matching, or does
it serve other purposes as well?
All the
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