This release fixes a few bugs that we wanted to squash before the package
gets pulled into upcoming distros.
See https://github.com/gnuradio/gnuradio/releases/tag/v3.10.1.0-rc1 for
more details.
The final v3.10.1.0 will be out in a few days, if there are no problems.
Hi. Yes. I am just looking at modeling a class-B distortion at the moment,
but could someone guide on how to convert between quadrature signals and
real signals. Because the rail (or the other one I was trying .. abs, only
work on real signals)
The simple example im trying to shoot for is create
Anish,
If you really just want to model crossover distortion in a class-B
amplifier, you could use a pair of Rail blocks:
[image: image.png]
If you're trying to model the distortion created by a real solid-state
amplifier, and not trying to correct it with predistortion, there are a
million
Hello Anish,
Non-linear power amplifier modeling and pre-distortion is a vast subject.
If you want to go deep in this matter I would suggest you to take a look at
Baseband polinomial models.
Here a reference I have used some time ago:
https://repositum.tuwien.at/handle/20.500.12708/13980
If
Marcus,
My problem is solved. I didn’t need to upgrade to Bookworm. Using the command
‘apt install gnuradio –dev’ instead of ‘apt install gnuradio’ did the trick.
I don’t understand the need for the –dev but it worked.
Jim
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Hi Anish,
there's been a Summer project that implemented and compensated nonlinear distortion.
Simple amplifier models are covered.
https://summerofcode.withgoogle.com/archive/2020/projects/5862185634365440
https://github.com/gnuradio/gr-dpd
You'll want to start by reading Alekh's proposal;
Hi,
How should I go about modeling the distortion introduced by a class-B
amplifier stage that clips the signal when its value is below zero?
Example:
I want to combine two FM modulated signals, pass them through this "class-B
distorter", demodulate them, and analyze the quality of the signal
Hi Mubashira,
When I was writing the
https://wiki.gnuradio.org/index.php?title=Packet_Communications tutorial, I
remember having some problems with the gr-digital/packet examples. If you
haven't already done so, you might like to look at that tutorial.
I don't have my GR 3.8 computer up
Hi Michelle,
If you are using a flowgraph from version 3.8 while running GRC with version
3.9, you may be having the problem described here:
https://wiki.gnuradio.org/index.php?title=Porting_Existing_Flowgraphs_to_a_Newer_Version#From_3.8_to_3.9
---
Barry Duggan KV4FV
Marcus,
I have upgraded my Raspberry Pi to Bullseye. When I attempted to upgrade to
Bookworm I got a message that the repository does not have a Release file.
Thus, I cannot upgrade. Bullseye gives me gnuradio 3.8.2.
I went on the Raspberry Pi forum for suggestions about what to do in order
Hi Marcus,
Thanks ! I already know that page. My question was more precisely on the
parameters to configure JACKD that it is possible to pass directly in
the Audio_sink (in "device name" field) or in the config.conf file.
Best regards,
Fabien, F4CTZ.
Le 25/01/2022 à 13:39, Marcus Müller a
Hi Johannes, hi Patric,
On 22.01.22 12:25, Johannes Demel wrote:
The `forecast` method expects estimates. The scheduler will call `general_work` anyways at
some point, if the system is unable to fulfill your forecast requirement.
No, that is not correct; at least in the 3.8-style scheduler
Hi LoyCurtis,
your question is a bit broad. I'll say that you'll probably first want to be able to build
a point-to-point connection before implementing a relay node. Have you done that (see our
tutorials)? If so, what's the question that arises on the way to implementing a relay?
(CR is a
Hi Fabien,
we've got https://wiki.gnuradio.org/index.php?title=Audio_Sink
If you want to use jack, you'd go into your ~/.gnuradio/config and set
[audio]
audio_module=jack
Best regards,
Marcus
On 25.01.22 10:58, Fabien PELLET wrote:
Hello,
My signal is in the range +/-1. As I use the audio
Can you try running this in a REPL to see what the return value of
firdes.lowpass(...) is?
--M
On Tue, Jan 25, 2022 at 2:03 AM Michelle wrote:
> hello,
>
> I'm using a FIR filter and I have the error : "Param - Taps(taps):
> Expression None is invalid for type'complex_vector'."
>
> my taps is
Hi Katja,
I was trying to figure out where that comes from. Maybe this is the key:
https://packages.ubuntu.com/jammy/libuhd-dev
This page is telling me that libuhd-dev recommends gnuradio-dev (not that
it depends on it). Maybe your script is also working on recommended
dependencies? Have you
Hello,
My signal is in the range +/-1. As I use the audio output of my RPI, it
seems that the problem is here : playing a wave file outside gnuradio
produce the same issue.
However, is there a tutorial somewhere or a manual that explain the
syntax that can be written in the "device name" of
Ali,
most of the time, these types of applications require the RX to be on
permanently (unless you know exactly when you're expecting packets), and
the TX only when you're transmitting packets.
In GNU Radio, this is simply achieved by using a USRP Sink and Source,
respectively. The USRP Source
The source code also warns me time out blocks and after it, the program
crashes...
when I disabled connect for rx_streamer block, the software has not any
error but I can not see outputs...
still, I am working on the problem to solve it.
*[WARNING] [RFNOC::GRAPH] One or more blocks timed out
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