I've got more info on my problem. Some of the blocks, including ATSC Field Sync
Demux, are missing. Could they have been renamed or combined into other blocks?
I don't understand why blocks would be missing from the latest stable Live DVD.
Any light shed on this would be greatly appreciated.
Hi all. I've been trying to get the ATSC pipeline to work with 8MHz RF spectrum
recordings from the SDRPlay.
When I provide a 16-bit RAW IQ recording from HDSDR, centered on the TV
channel, the script runs at 100% CPU for a long time and closes but the output
TS file stays at 0 bytes.
Any advice
Hi everyone. With help from Ron Economos, I managed to make ATSC decoding work
using the SDRPlay RSP.
The big issue was that the RSP has a DC bar in the middle of the waterfall.
Canceling it in the SDR program isn't enough; you have to get the latest driver
and use the EXTIO options *in addition
Does anyone know what this signal is?
http://www.sigidwiki.com/wiki/One_of_many_signals_near_877_MHz.
I think it’s LTE but I’m not sure. If it is, I’d like to be able to use gr-lte
to decode it.
___
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s.com
Date: Thu, 3 Dec 2015 23:15:52 -0800
Subject: Re: [Discuss-gnuradio] Possible LTE signal
To: kw...@outlook.com
CC: discuss-gnuradio@gnu.org
That looks like two signals, each ~1.25MHz wide. Maybe old school CMDA2000.
On Thu, Dec 3, 2015 at 7:46 PM, Henry Barton wrote:
Does anyone know what t
I previously asked about a mystery signal I had encountered and was told it was
either CDMA2000 or IS-95. Can GNURadio decode either these?
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Ron, do you have any IQ files of ATSC 3 for us to try out?
I agree with you that ATSC 3 may be met with resistance. Another big switchover
would upset a lot of people, even though this may finally make DTV as
dependable as analog. I've described some alternative TV encoding schemes on m
I am completely new to signal processing and Python. Does anyone know any good
beginner Python tutorials for signal processing, preferably in Windows?
I would like to write a Python script to generate a Direct Sequence Spread
Spectrum signal but outside of GNURadio if possible. Preferably I’d
Hi all. I've successfully written a DSSS modulator and demodulator in Windows
with a chip rate of 16x. It writes samples to a file that the demodulator can
read and despread. Before I try any practical implementations, I need to know
how a DSSS stream would be synchronized. Assuming the transmit
Windows Mail
From: Richard Bell
Sent: Friday, February 5, 2016 5:59 PM
To: Henry Barton, discuss-gnuradio@gnu.org
It will depend on how the rest of the radio is built up. I'm not familiar with
VP9, but can I assume it's a spec on bits in a higher layer then Layer 1?
Ano
As you know, I’ve written a baseband DSSS modulator and demodulator. I’ve got
the waveform samples, but I know I need a modulation scheme to actually send it
through the air. I’ve heard somewhere that OFDM can be used for CDMA DSSS, and
also 4-qam/QPSK. Can anyone tell me what modulation schemes
are just for
demonstration purposes and in reality you just transmit your spreaded (repeated
and XOR-ed bits) as ordinary PSK.
Sent from Windows Mail
From: Ed Criscuolo
Sent: Tuesday, March 8, 2016 6:11 PM
To: Henry Barton
NASA successfully uses BPSK, QPSK and OQPSK
Hi, does anyone know of any good tutorials that explain how to lock onto the
clock of a QPSK signal and/or correlate? I know this is all very simple in
GNUradio, but I hope someone knows of a website or, preferably, a video series
that will explain this.
If I have 10 different QPSK users, sprea
.com
Date: Wed, 16 Mar 2016 14:03:32 +0100
Subject: Re: [Discuss-gnuradio] Lock onto QPSK signal
Hi Henry,
Interesting questions!
On 16.03.2016 03:48, Henry Barton
wrote:
Hi, does anyone know of a
This sounds interesting; I too have been wondering how IQ files worked. I
thought it must be alternating I bytes and Q bytes, or with >8-bit radios, I
words and Q words. But maybe the packed byte system is right, since I can feed
IQ recordings in WAV format directly into GNUradio without strippi
the 26-MHz-wide 900 MHz ISM band.
Sent from Windows Mail
From: Marcus Müller
Sent: Wednesday, March 16, 2016 10:34 AM
To: discuss-gnuradio@gnu.org
Hi Henry,
On 16.03.2016 15:24, Henry Barton wrote:
Wow, thanks for the comprehensive reply. You covered a lot of mater
Is there any simple formula for plotting spectrum (finding the intensity of
each frequency component, Hertz by Hertz) from IQ recordings? Specifically I
need to know how to read an IQ file and somehow dissect clusters of samples.
I’ve written programs that deal with large amounts of data from fi
So there’s no “read x samples, divide by y, do such-and-such, and you have a
frequency-domain array” that I can average over time?
Sent from Windows Mail
From: Nikos Balkanas
Sent: Saturday, March 19, 2016 1:31 PM
To: James Humphries
Cc: Henry Barton, discuss-gnuradio
I studied enough for ch 1-2 and was able to get 100, 87, 100, and 95 on the 4
assignments.___
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https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Yeah, in my haste I mistakenly clicked on the mailing list which has the same
icon as another of my contacts.
Sent from Windows Mail
From: Martin Braun
Sent: Thursday, March 17, 2016 10:20 PM
To: Henry Barton
Cc: discuss-gnuradio@gnu.org
Congrats!
... Although this
28
Date: Wed, 16 Mar 2016 15:33:00 +0100
From: Marcus M?ller
To: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] Lock onto QPSK signal
Message-ID: <56e96e9c.5080...@ettus.com>
Content-Type: text/plain; charset="utf-8"
Hi Henry,
On 16.03.2016 15:24, Henry Barton wrote:
>
from Windows Mail
From: Nate Temple
Sent: Saturday, March 19, 2016 2:51 PM
To: Henry Barton
Cc: discuss-gnuradio@gnu.org
Hi Henry,
Here are a few open source applications you may find useful to reference to
build your tool.
rtl_power + heatmap.py (c/python) - Hard coded to
harmonic you mix it down to DC then sum (integrate). The FFT is
different (I actually don't know how it works, other than it operates on 2^n
samples), but the output is the same.
Lou
Henry Barton wrote
> I’ve read up on the FFT and DSP and I must say I’m impressed that
> multiplying tw
in\{1,\dots,N\}$), and multiply it point-wise with $m$-th column of
the right factor ($x$, which only has 1 column, so $m\equiv 1$) and calculate
the sum.
On 20.03.2016 17:45, Henry Barton wrote:
So correlating is digitally mixing something with a predetermined sequence?
I’ve been struggli
I like the concept of your program. It looks just like what I’m trying to write.
Sent from Windows Mail
From: Vitt Benv
Sent: Sunday, March 20, 2016 4:16 PM
To: discuss-gnuradio@gnu.org
Hi,
this [ https://sourceforge.net/projects/automodrecog/ ] is my little
effort about
et me know about ur progress,
> pse!
> Remember that it's fairly resource hungry ( file larger that 250 Mb
> crashes the app also on my I7/16Gb), but it's a starting point.
> I think that with GNURADIO it's possible to refine this task... I've a
> lot to study!
>
&g
I have the same issue. It’s a bug in email clients. Just delete the person from
your recipient bar and type the address of the mailing list. The Subject line
will make sure the message is appended onto the thread.
Sent from Windows Mail
From: Tanero Juthero
Sent: Sunday, March 27
http://rtlsdrblog.rtlsdrblog.netdna-cdn.com/wp-content/uploads/2015/10/sdrpl
ay_lband-1024x573.png
I didn't see the widest signal (bright yellow) from this picture on
sigidwiki.com. Does anyone know what it is? If so, can it be decoded by
GNUradio? Thanks.
[The answers to both 1) and 2) are yes.]
That's great. Thank you.
[Stay tuned.]
What does that mean? Do you have more info?
_
From: Ian Buckley [mailto:i...@ionconcepts.com]
Sent: Tuesday, May 03, 2016 4:37 PM
To: Marcus D. Leech
Cc: Henry Barton; Discuss-gnuradio; di
like a blowtorch.)
Anyway, can’t wait to see your program. Is it on Github?
Sent from Windows Mail
From: Kevin McQuiggin
Sent: Tuesday, May 3, 2016 10:02 PM
To: Henry Barton
Cc: discuss-gnuradio@gnu.org
Hi Henry:
I have an Inmarsat demodulator working for the lower
Thanks, Ian. So the I prefix is Inmarsat?
Sent from Windows Mail
From: Ian Buckley
Sent: Wednesday, May 4, 2016 12:47 PM
To: Kevin McQuiggin
Cc: Henry Barton, discuss-gnuradio@gnu.org
Henry,
Its important to realize that there are 3 generations of Inmarsat systems
The wide signal in question is about 168 kHz. I’ve been able to see several
side-by-side like in other people’s pictures by using 9A4QAV’s helix.
Sent from Windows Mail
From: Henry Barton
Sent: Wednesday, May 4, 2016 1:08 PM
To: discuss-gnuradio@gnu.org
Thanks, Ian. So
I discussed this on #hearsat and it appears to be BGAN.
Sent from Windows Mail
From: Henry Barton
Sent: Wednesday, May 4, 2016 1:18 PM
To: discuss-gnuradio@gnu.org
The wide signal in question is about 168 kHz. I’ve been able to see several
side-by-side like in other
Personally, I think a passive GSM attack would be more useful. Has that been
accomplished yet? I saw a scholarly article on it but I haven't seen any
articles/tutorials on cell hacks except the GSM attacks that require you to
transmit.
From: Ronald F. Guilmette
Sent: Thursday, June 16
I’m designing a CDMA system with a spreading factor of 20. I recently wrote an
app to go through all the binary permutations up to 2^20 and report which ones
have an equal number of 0’s and 1’s, or at least differ by only one. It came up
with so many “hits” that I have to wonder if they're reall
might be Gold code or Hadaramd code.
Dne 15.7.2016 v 09:24 Johannes Demel napsal(a):
> 20!
>
> On 15.07.2016 04:54, Henry Barton wrote:
>> I’m designing a CDMA system with a spreading factor of 20. I recently
>> wrote an app to go through all the binary permutations up to 2^2
184,756 is exactly what I got.
From: Marcus Müller
Sent: Saturday, July 16, 2016 7:13 AM
To: discuss-gnuradio@gnu.org
Ah, so, by the way, 10bit-out-of-20bit-set generator attached.
On 15.07.2016 04:54, Henry Barton wrote:
I’m designing a CDMA system with a spreading
I would go for more real cores. Back when I was doing CGI, I thought the
Pentium 4 with HT would be a good idea, but it wasn't. On that CPU, the
logical Intel cores only do integer operations; floating-point can only be
done on real cores. It's probably the same on the modern chips, otherwise
On Thu, 22 Sep 2016 13:03:47 -0400, Henry Barton wrote:
Sorry, Marcus. My email once again sent just to you.
I would suggest a used Core i5 PC. The i7, IMO, is just a 10% better i5 for
150-200% the price.
You'd be surprised how much computer you can get if you buy just a couple years
o
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