Hello everyone,
I am setting up a MIMO system with usrp N320 and N321, as you can imagine I
am facing some problems.
The first one is relative to USRP module synchronization, especially about
LO distribution through Usrp N321 . To allow you understand I have attached
test files grc and python,
I think you have a version mix. gnuradio 3.9 uses std::shared_ptr but
you boost::shared_ptr which is 3.8
So you need a version of gr-packetizer that supports 3.9.
-- Volker
Am 09.08.21 um 11:42 schrieb Yash Agrawal 18410 via GNU Radio, the Free
& Open-Source Toolkit for Software Radio:
Hello e
Nathan, Gary, Mike, all.
1/ Just to throw in some more "interesting sources".
- First, you did already mention the 'software defined radio with
HackRF' videos by Michael Ossmann.
I always advice people to start by just watching all of them and let it
all 'come over you'.
Especially the one
hi there.
First off, let me say that gr-fosphor is one of the most impressive
visualizations i've seen in SDR. I've used it with NVIDIA GPU's as well as
FPGA's (RFNoC). I rely on it so much that it's become my go-to display in
my SDR software suite.
UNFORTUNATELY for some reason, recently my fosph
Hi, sorry for the late reply!
I've been working on the View Only Mode for GSoC'21 during the summer and
am finishing it up this week. If you want to read about what has been done
so far you can check out my blog (https://oscekh.github.io/) and look out
for the pull request that I'll make later thi
Hi Paul,
Mmm that's strange. What NVidia driver version are you running ? And
any chance they got updated (or other part of the OS) between the last
time it worked and now ?
I'm not sure what timeout you're talking about, but in any case, the
batch size (CL job) in gr-fosphor is constant, there is
Hi all,
I am playing around with PSK demodulation, now doing a small project
trying to decode the slow-speed PSK data on the 198 KHz carrier of BBC
radio 4.
The specs are here:
http://downloads.bbc.co.uk/rd/pubs/reports/1984-19.pdf
According the document (page 2 of the document, page 8 of t
Hi Kristoff,
You can just put an additional RRC in front of it or you can calculate the tabs
by folding die tabs of the RRC with themself. There is probably a numpy
function to do that. Have not tested any of that, but both ways should do the
trick.
Fabian
Am 10. August 2021 20:44:05 MESZ schr
Kr,
That pulse shaping is *identical* to that for a RDS signal. I'm able to demodulate the
RBDS signal using a RRC filter in a "Polyphase Clock Sync" block. Adjusting the
parameters from the RDS signal to that of your BBC signal (1187.5 Hz bit rate to 25 Hz
bit rate), you'd get the following p
Hi Fabian,
Thanks, i'll try both options and compair them.
I remember from my books on DSP it is possible to combine multiple
consecutive FIT filters into one, so I did a little bit of more research
on this.
I found (*) that -as convolution as associative- this implies this:
(( f * h1) *
Hallo Gary,
OK, I based my assumption on the graph of the RC on wikipedia (*)
Perhaps I got it wrong and is the frequency-response indeed a RRC, not a RC.
If yes, this would make things a lot easier.
(Perhaps I got confused by the fact that amateur-radio PSK31 uses RC
instead of RRC, so per
hey Sylvain,
i'll check when i get back in front of my computer. i want to say 460.7x
but that's a guess. its the latest on 20.04 from apt repos.
To your question about updates. so, technically yes i had this behavior
when i updated my 18.04 to 20.04 which i didn't suspect would go
well...and it di
Seems fine, should work :)
Am 10. August 2021 22:44:44 MESZ schrieb Kristoff :
>Hi Fabian,
>
>Thanks, i'll try both options and compair them.
>
>
>I remember from my books on DSP it is possible to combine multiple
>consecutive FIT filters into one, so I did a little bit of more research
>on thi
Hi gary, Fabian, all,
Small note:
The first tests seems to indicate the the rrc-filter works! Yes!
- I can decode large chunks of data with valid Manchester-encoding.
However, from time to time, I do get large blocks of data (10 to 20
seconds) with errors.
- Changing the value of alpha does
Hi Gary,
Thanks for the reading list. I’m an engineer, so I have multivariate calculus
under my belt, but I’m not an electrical engineer, so sometimes when texts get
too down in the weeds my eyes roll back in my head and I start foaming at the
mouth, haha.
As for hardware, I mentioned in my o
ok, this isn't fosphor, i'm really sorry to have bothered you.
This is a stupid UHD4 bug that's emerged where if you even drop one single
sample UHD terminates the stream. In this case the downstream block was
gr-fosphor, but i've been able to confirm now that the same thing happens
with regular QT
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