Hello, I have noticed that such a method ia available:
//# Automatically generate the FSM from the generator matrix
//# of a (n,k) binary convolutional code
//##
fsm::fsm(int k, int n, const std::vector& G) I am doing some
experi
-nbfm-am-dsb-usb-lsb-Transmit.grc
Il gio 24 ott 2019, 07:11 Matteo Campanella ha
scritto:
> Thanks for the link Ron, that’s indeed an interesting solution.
>
> I’m still trying to understand why the matrix multiplier approach blocks
> though, and if there is a way to make it work, as
Thanks for the link Ron, that’s indeed an interesting solution.
I’m still trying to understand why the matrix multiplier approach blocks
though, and if there is a way to make it work, as it is so easy to
implement a complete solution with multiple sources and multiple
modulations and a single sink
Hello, I am trying to design a flow which implements a transmitter with two
sources (a signal generator or an audio source), two modulator flows (nbfm
and am) and a single sink (my hackrf device via osmosdr block).
The idea would be to make the sources and modulators switchable via a GUI
drop down
Hello everyone, I have just finished testing with good results a new
implementation of RDS decoding. This work is based on the rds block
published on the list some time ago from Ronnie Gaensli, and later adapted
by Ryan Shoff.
Main changes from the original version posted:
biphase_decoder:
1) los
-01-14 at 08:30 -0800, Johnathan Corgan wrote:
> On Sun, 2007-01-14 at 08:50 +0100, Matteo Campanella wrote:
>
> > Pango-ERROR **: file pango-layout.c: line 3230
> > (pango_layout_check_lines): assertion failed: (!layout->log_attrs)
> > aborting...
>
> I have had a
Hello, I hope some wxWidgets / GNOME experts will know about this
problem:
I use the StaticText.SetLabel to change the value of a label at runtime
from a python callback from a custom block. Randomly I get this GNOME
error:
Pango-ERROR **: file pango-layout.c: line 3230
(pango_layout_check_lines)
> // From this point sync clk
> //
> d_sign_last = (clk[0] > 0 ? 1: -1);
> for (i = 0; i < n_clk_in ; i++) {
> sign_current = (clk[i] > 0 ? 1: -1);
> if(sign_current != d_sign_last) {
>
r to where I actually am on signal so that
consume on channel 1 will be similar (in number of samples to consume) to
consume on channel 0, then I experience correct sample consuming and
clock/signal alignment on the next work cycle.
regards
Matteo iz2eeq
> On Wed, Jan 03, 2007 at 09:32:06A
ALWAYS get clock
transition in sync with symbol start.
regards
Matteo
> On Tue, Jan 02, 2007 at 07:59:00PM +0100, Matteo Campanella wrote:
>> Hi everyone, on Dec 25th I posted a message about a possible strange
>> behaviour of consume in a block where there are two inputs and
Hi everyone, on Dec 25th I posted a message about a possible strange
behaviour of consume in a block where there are two inputs and samples are
consumed at different rates; in order to further check the nature of the
problem, I changed to code so that the clock input was checked for a
transition i
Search the list on the subject - I did a posting some time ago about using
DRM decoder with USRP bymeans of tmpfs ram based named pipe for interface...
have a happy new year all
- Original Message -
From: <[EMAIL PROTECTED]>
To:
Sent: Friday, December 29, 2006 18:09
Subject: Disc
First of all merry xmas to everyone on the list!
I was checking the code for byphase decoding of rds, and I have noticed
that in the ST_LOOKING state the author waits for two valid zero
crossings in the signal, spaced enough to look like symbols, and then
uses the consume function to "rewind" to t
Hello folks, I've just wiped out and recompiled the whole GNURADIO on my
FC5 64, and unfortunately now no application runs anymore... even the
simplest dial_tone.py produces this output:
[EMAIL PROTECTED] audio]$ ./dial_tone.py
Traceback (most recent call last):
File "./dial_tone.py", line 23, i
Hello Eric, I am basically doing the same you did on the RDS code and
specification; right now I have introduced syndrome based sync and indeed it
looks like it get synced much faster. I am using the wfm receiver (non pll),
but, not having implemented the loss of sync yet, I cannot tell how fst
Hello every1,
I haven't been playing with the fft scope for a while until yesterday, when I
realized that it frequently hangs on my fc5 with two weeks ago trunk
gnuradio... The scope freezes (in all modes) and it needs to be killed to get
the control back. No underruns or any messgae that could
hello, i would like to get list advice about the best way to demodulate pulse
position modulation; i was thinking about envelope detection as in am, followed
by a custom block to do packet start recognition and bits decision, but i am
not sure it is the best approach...
The ppm would be at 1mbps
So I decided, after Eric posting to spend part of the Sunday taking care
of ADS-B, and started doing some thinkering and frequency monitoring.
>From the links read I thought I should expect bursts of radiofrequency
at 1090MHz whose duration is 0.5 microseconds, differently spaced
depending on wheth
Hello, that sounds really strange. In order to be sure everything is at
the right place, I downloaded the tgz myself and recompiled, and
everything is ok. I did:
make clean
./bootstrap
./configure --prefix=/usr/local/gr --enable-maintainer-mode
make
make install
the file packetradio.i is there, i
I've finally reviewed all the material and converted the old code to make it
more user friendly as well as to make use of the great blocks GNURADIO
offers. I am talking about the Mueller and Muller clock recovery and
sampler. Now both 1200 and 9600 python code works, both for transmit and
recei
Hello, I have noticed that the DC offset removal IIR filter that was in
the old gmsk2.py is not there anymore in the new gmsk.py - is
there any
particular reason for that? Or is it simply that it has been
moved
somewhere else along the modules chain?
Hello everyone, I have just put together a working version of some python
scripts and a GNURadio block to receive and trasmit Amateur Packet Radio
packets. Only 1200 baud AFSK version is working right now, while the 9600
G3RUH is very work in progress (just started). The software can be found at
Hello and sorry for the off topic but maybe someone had the same problem. I
just bought a disk to have gnuradio on fc5 on its own disk and put it on the
second channel of my mb via sata controller... Surprise, the good 'ol anaconda
from fc5 x64 dvd does not list second sata drive in the availabl
Hello folks, I've just added to http://gnuradio.org/trac/wiki/FC5Install
what I do usually type in FC5 before happily building gnuradio from svn.
Hope I got it right.
cheers
Matteo iz2eeq
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http
a working gnuradio and folks can
spend more time developing and less time configuring.
Thanks,
Clark
From: "Matteo Campanella" <[EMAIL PROTECTED]>
To: discuss-gnuradio@gnu.org
Subject: [Discuss-gnuradio] Fedora Core 5 gnuradio vmware image
Date: Fri, 8 Sep 2006 15:06:13 +0200 (CES
Hi everyone, I have built a brand new vmware image with updated fedora
core 5 and latest gnuradio from trac - obviously the usrp won't work
because of usb2 not supported on vmware, but it's a nice to have for on
the run gnuradioing.
Only problem is the image takes 5 GB so it's kinda akward to be e
u, 13 Apr 2006 11:46:29 +0200 (CEST)
"Matteo Campanella" <[EMAIL PROTECTED]> wrote:
Hello, has anyone tried reception of mode S ADS-B with the usrp/gnuradio?
This has recently piqued my interest too but didn't see any response to Matteo's
rd this to the mailing-list because other people
might be interested too.
Greetings,
Martin
best regards
Matteo Campanella iz2eeq
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hello, is anyone experiencing problems in checking out opensdr from
sourceforge ? I am getting a "no route to host" since yesterday
cheers
Matteo
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Hello, maybe this is not new, but I have found how to avoid the sudo on
Fedora Core 5 and run usrp python code as a normal user - the file that
needs to be modified is /etc/udev/rules.d/50-udev.rules, line 308 in my
fedora core 5 dist:
#
# Persistent block d
hello list,
Is there any example available for doing gsm cellphone detection, or even cell
detection?
I am thinking of the uk malls people flow monitoring presented in the article
on wired, even though my need would be more in the rescue activity on the field.
Regards
Matteo iz2eeq
_
Hello, has anyone any informations about the remote weather sensors from
oregon scientific? I have one that I would like to receive with my computer
and USRP - the one I have has five channels to choose from (I do not know if
they are logical channels or physical different frequencies) and it
t
Great article, Matt, congratulations - that would spread the software radio
work even more.
As much as it regards the freedom on bands, well it's a dream in my opinion,
cause, as every freedom, it would be very easy to turn it into the
adavantage of few individuals with a loose ethical sense.
Hi Alexander, I will be there with family and fellow hams! See ya!
ciao
Matteo iz2eeq
> Hello,
>
> I wonder if anyone is coming to Friedrichshafen (Germany) for Ham Radio
> 2006, June 23-25?
>
> http://www.hamradio-friedrichshafen.de/html/en/index.php
>
> Alex
>
>
> __
Maybe a permissions problem? Have you tried with sudo, or simply eunning
examples as root?
mc
-Original Message-
From: "Richard Bitter"<[EMAIL PROTECTED]>
Sent: 18/05/06 19.14.14
To: "discuss-gnuradio@gnu.org"
Subject: [Discuss-gnuradio] Trouble getting USRP up and runnin
Brett, here there is how I made it work on my install:
1) create a tmpfs on linux by adding this mount point to /etc/fstab:
ramfs /mnt/ramfs tmpfs defaults 0 0
2) mount the new ram file system "mount ramfs"
3) create a pipe with the command "mkfifo /mnt/ramfs/dr
Unfortunately, all the repeaters around here have a 1240MHz input and
10.470GHz output, so dbrx on its own won't help (unless I will be lucky
enough to be in the uplink beam of a ham while transmitting :-) ). I am
already working on a receiving system based on an offset dish and modified
satell
time...)
Matteo
- Original Message -
From: "Greg Troxel" <[EMAIL PROTECTED]>
To: "Matteo Campanella" <[EMAIL PROTECTED]>
Cc:
Sent: Wednesday, April 26, 2006 2:47 PM
Subject: Re: [Discuss-gnuradio] measure of the SNR in a packet
Hello, I would like to
Hello, I would like to write some code to calculate the SNR of a signal;
in my case this signal is a packet radio AX25 1200 baud packet burst
received thru TV RX and usrp.
Is there anything ready for use or has anyone good suggestions to
implement this?
thanks
Matteo
__
hello,
In the case of atv, as I believe the passband of the signal is way too large
for the throughput of usrp usb, are there any special techniques/tricks to
achieve some sort of result?
Regards
Matteo
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The DRM is still sitting on sourceforge @ http://drm.sourceforge.net/
It builds nicely on FC4, provided that the instructions on
http://drm.sourceforge.net/installation.html are followed.
In order to make it work with usrp it is sufficient to write some python
code with a gr_file_sink of shorts @
Hello, i have noticed the use of consume_each(n) in some of the block sources;
for example in the simple correlator it is called once with n and once with n
plus one - what is exactly its function and is it the only consume function?
What is the meaning of the parameter?
Thanks
Mc
__
Hello, I found out that the max tx freq is limited in usrp_standard.cc
to 44MHz (since USE_FPGA_TX_CORDIC is undef'd). Now, since a 128MSps
should safely ensure 64MHz, what is actually imposing that limitation?
I was trying to go to 6mtrs ham band...
MC
Hello, has anyone tried reception of mode S ADS-B with the usrp/gnuradio?
MC
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hello, I found a simple way to interface sound applications with USRP
and gnuradio; maybe it is already widely used, but I guess it is worth
mentioning it - this method work provided that the application is able
to get samples from file, my experience has been done with drm, that
called with the op
hello, thanks to your suggestions I have been able to obtain a quite
working demodulation, what I am actually trying to demodulate is AFSK
1200baud ax25 packet; the steps I am doing are
1) channeling from USRP stream - complex stream
2) fm demodulation - real stream
at this point I have an audio
I have tried building the analytic by hilbert, but I think that, because
of the many near DC components of the signal, I do not get a nice
quadrature demod output...I will try with a pll, thanks for the
suggestion!
MC
> Matteo Campanella wrote:
>> Hello, I am quite stuck at a problem
Hello, I am quite stuck at a problem, that is, how to demodulate a FM
signal that is NOT in complex form using existing gnuradio blocks. The
quadrature demodulator works only with complex input; I have tried to
build an analytic signal out of my real one, but the result of the
demodulation is then
Hello,
Is there any python mapped function that allows to change the tx dac rate?
Sometimes, when you start with a fixed baud rate, being the interpolation
chain all made up by integer numbers, one does not end up with 128e6... it
could be a good occasion to use a rational resampler, but when a
Hello everyone, I have just finished drafting a working version of AX25
packet generator and AFSK modulator (baseband for the time being). The
ax25 related code is contained in the ax25.py file, that is far from being
nicely written.
I have tested the resulting audiofile with mixw on windoze and i
he first experimenters glommed onto some surplus BEL
> 202 modems and used those as the last stage of their cobbled-together
> TNCs; the use of AFSK with 1200 and 2200Hz tones is simply an artifact
> of that.
>
> 73,
> John N8UR
>
>
> Matteo Campanella wrote:
>> I&#
hase data in BEL-202.
>
> Take it or leave it. I have left this conversation as of now.
>
> Bob
>
>
>
>
>
>
> Matteo Campanella wrote:
>> 100011010 should become
>> 10 0 0 11 01 0
>> space-sp
gt; after demodulation which Manchester would eliminate. It does have
> differential encoding but that is not Manchester.
>
> 100011010.
> would be transmitted as
> ?10010111
>
> This is nothing to do with biphase elements.
>
>
> Bob
>
>
>
> Matteo Campanella
51:03PM +0200, Matteo Campanella wrote:
>> Hello, I am trying to find the best way to implement a bell 202 modem in
>> gnuradio. The problem I am facing is that I need to produce two tones,
>> one
>> for mark and one for space, and I have to switch from one to other
>>
Hello, I am trying to find the best way to implement a bell 202 modem in
gnuradio. The problem I am facing is that I need to produce two tones, one
for mark and one for space, and I have to switch from one to other
depending on which symbol I am sending. The duration of the tone (or tone
switch) mu
hello everyone any documentation detail on:
gr_pll_carriertracking_cc
gr_pll_freqdet_cf
gr_pll_refout_cc
?
mny tnx
ciao
Matteo iz2eeq
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ossom" <[EMAIL PROTECTED]>
To: "Matteo Campanella" <[EMAIL PROTECTED]>
Cc: "Robert McGwier" <[EMAIL PROTECTED]>;
Sent: Monday, March 20, 2006 8:21 PM
Subject: Re: [Discuss-gnuradio] jackit cvs rep not accessible
On Mon, Mar 20, 2006 at 07:44:4
I guess that, being the array approach the one used in c++ blocks, that
would be the best to use in python as well. So I would definitely work
with input and output arrays.
ciao
Matteo
> On Thu, Mar 23, 2006 at 09:31:01PM +0100, Matteo Campanella wrote:
>> Suppose I am willing to test s
Suppose I am willing to test some ideas, and that I do not care about
latency or speed - I just want to be able to drop some quick lines of
code to see if the idea is a good one or not... it would be nice to
write a function in python and put it in the graph to see how it
performs in the chain, usi
Hello, is there any gmsk like code that implements manchester rather
than nrz? and maybe dpll demod?
ciao
matteo
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Hello, looking at the sources of those blocks, I have found calls to the
function slice(), where is it defined?
regards
Matteo iz2eeq
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rence about how to build a virtual card able to "short-circuit" the
output of an application to the input of another... any hint?
ciao
Matteo
> - Original Message -
> From: "Eric Blossom" <[EMAIL PROTECTED]>
> To: "Matteo Campanella" <[EMAIL
AIL PROTECTED]>
To: "Robert McGwier" <[EMAIL PROTECTED]>
Cc: "Matteo Campanella" <[EMAIL PROTECTED]>;
Sent: Monday, March 20, 2006 7:37 PM
Subject: Re: [Discuss-gnuradio] jackit cvs rep not accessible
On Mon, Mar 20, 2006 at 01:08:19PM -0500, Robert McGwi
Hello, the cvs repository for jackit seem not accessible from here at
least from Sunday morning... it just hangs at login time. Alot of other
projects, always located on sf are perfectly accessible instead... is
any of you experiencing the same thing?
regards
Matteo
I've just finished a low noise preamplifier prototype based on Avago
MGA62563, and I would like to use it in conjunction with the tvrx - the
device needs 3V @ 60mA, or 5V - is there any place on the board where I
can get such a supply safely?
ciao
Matteo iz2eeq
_
Today i dedicated my spare time to the tx basci board, experimenting with
usb, lsb and am signal synth.
The idea was tp get voice from pc microphone and usb or lsb modulate it. I
used a phasing modulator, based on the code excerpt reported below;
basically I apply a pass band to the float source
Hello, I have made my first attempt at gnuradio and usrp today, trying
to get a phasing ssb demod - what follows is what I got, any suggestion
would be more than welcome. The demod is designed as a class to be
istantiated by a gui (i am using a modified version of usrp_wfm_rcv
gui). Right now the o
It just happens I've got some MGA62563 from Avago (former Agilent) - those
are MMIC on steroids: 0.8dB noise figure from 50 to 1300 MHz, 22db gain -
5v supply, very simple polarization circuit. Let's see how it performs.
Given the very low intermod characteristic of the MMIC, i'll try without
filt
if (verbose)
fprintf (stderr,
"compute_freq_control_word_fpga: target = %g actual = %g
delta = %g\n",
target_freq, *actual_freq, *actual_freq - target_freq);
return (unsigned int) v;
}
- Original Message -
From: "Eric Blossom" <[EMAIL PROTECTE
As there is alot of software that takes the soundcard as default source
for doing digital processing, do you think it would be possible to build a
virtual sound card device driver to be used as sink from gnuradio and as
signal source from one of these softwares?
I mean, a virtual sound card driver
Hello, FC4 is the very same system i am runing right now... the error
you're ecountering could depend on the fact that your architecture is AMD
based and not Pentium (is that true) - for AMD platforms you should
indicate 3dnow and not sse in the buildbaseline from kd7lmo - he defaults
to sse indeed
Hello, I started my testing evening (after ARRL worldwide phone contest,
where I was desperately looking for Vermont to close WAS - are there hams
in Vermont??? :-)) taking care of TVRX.
First thing I did was to attach the TVRX to the tribander collinear I use
for V/UHF local traffic and use the n
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