Cool! Is there an optimal receive antenna polarization?
Michael
On Mon, Jul 03, 2017 at 10:07:03PM +, Juha Vierinen wrote:
>
> Hi,
>
> I forgot to mention that the interpulse period is 38 ms on 2017/07/04 at
> 01:21:00 UTC and 40 ms on 2017/07/05 02:04:00 UTC.
>
> juha
>
>
> On Mon, Ju
GNU Radio Conference attendees,
Please join us for an open house at the Great Scott Gadgets laboratory
following GRCon16. At Great Scott Gadgets we make HackRF One and other
open source hardware for innovative people. We recently moved to new
location in Evergreen, Colorado, and decided to sched
Just in case anyone isn't yet convinced about the power and usefulness
of inspectrum, check out this short demo video showing features in
development:
https://www.youtube.com/watch?v=9QyGKjt8zkE
Mike
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On Tue, Mar 08, 2016 at 08:40:13PM -0500, Paul Garver wrote:
>
> This isn’t GR-specific, but Inspectrum [1] has been making a good
> amount of progress. It handles large files exceptionally well and it’s
> pretty straightforward to get a decent looking spectrogram. You might
> take a look to get so
On Fri, Jan 01, 2016 at 12:07:39PM +0100, Daniel Pocock wrote:
>
> Are there any single SDR devices for RX and TX across all the most
> common ham bands from 3.5MHz (80m) to 450MHz (70cm) that people
> recommend or already use with GNU Radio?
HackRF One operates from 1 MHz to 6000 MHz. Many other
On Wed, Dec 02, 2015 at 02:41:29PM +0100, Michael Kramer wrote:
>
> I've tried your suggestion but again I'm a little bit confused by the
> results. The attached Wave2 is produced if I decimate by 100 in my Low
> Pass Filter right before the Hilbert -> Quadrature Demod. If I don't
> before, but aft
On Tue, Dec 01, 2015 at 02:14:59PM +0100, Michael Kramer wrote:
>
> I have the following problem. I've got a signal and I know it's FFSK
> modulated with a bitrate of 2400. I've tried to read some tutorials or
> find other information about FFSK (which is the same as MSK
> apparently), but I found
On Tue, Nov 03, 2015 at 09:29:13AM +, Denis Stijn wrote:
>
> I have a question regarding the use of the GFSK modulator block. I
> have a simple schematic: a random repeating (Byte) source is connected
> to a GFSK mod block (Samples/Symbol: 8, Sensitivity: 707m, BT: 500m),
> which is connected t
I'm not Miek, but I'll pass along your comment. :-)
On Mon, Sep 14, 2015 at 11:07:46PM +0200, Marcus Müller wrote:
>
> Mike,
>
> awesome :) I like the simplicity in your mmap'ed storage approach!
> Thanks for sharing this,
>
> Marcus
>
> On 14.09.2
Also check out inspectrum:
https://github.com/miek/inspectrum
So far only a spectrogram view is implemented.
Mike
On Sat, Sep 12, 2015 at 08:47:00PM +0200, Marcus Müller wrote:
>
> Hi Przemek,
>
> in fact, you can import the raw float (complex) files in audacity; try
> File->import->Raw Data
On Tue, Sep 08, 2015 at 04:33:38AM +0200, Douglas Beonkey wrote:
>
> If I create a signal source block with a starting frequency of 1.2
> GHz, and in the block have a variable slider added to the frequency
> (assume the variable can slide between 0 and 1000), i must move the
> slider 120 or more st
eff Long wrote:
>
> After way to much searching ... under Anisochronous modulation, there is
> something called Digital Pulse Interval Width Modulation (DPIWM).
>
> http://paradise.caltech.edu/papers/thesis010.pdf
>
> Seems like as good a name as any.
>
> - Jeff
>
te:
> > Why not make the ratio 1:3 and then you could call it Morse PWM. :-)
> >
> > On 4/2/2015 2:16 PM, Michael Ossmann wrote:
> >> A friend recently showed me an OOK modulation that I had never seen
> >> before, and I'm wondering if anyone knows a name for t
A friend recently showed me an OOK modulation that I had never seen
before, and I'm wondering if anyone knows a name for this scheme.
It is PWM where both the on periods and off periods carry data in their
durations.
In the example we observed, an on or off period with a duration of two
units rep
On Mon, Nov 17, 2014 at 11:09:14AM -0800, Richard Bell wrote:
>
> Would someone please recommend a book that steps through the
> implementation used in GNU Radio for the Frequency Mod and Quadrature
> Mod blocks?
I discuss the algorithm implemented in the Quadrature Demod block in
this video:
htt
On Thu, Sep 25, 2014 at 09:53:54AM +0200, Jean-Baptiste Truffault wrote:
>
> >> First, I recorded a DSRC signal thanks to Gnu Radio and my USRP N210
> >> (with a CBX daughter card): 5Msps, 5.127 GHz.
> > I don't think so. This does not look like a 10MHz OFDM signal...
Are you trying to capture a
On Mon, Sep 08, 2014 at 06:06:42PM -0400, GeorgeF wrote:
>
> Now, using the "osmocom Source" & HackRF I receive the following error
> msg. "FATAL: No supported devices found to pick from" Is there a
> driver I need to download for HackRF, if so where & how to I add that
> to my system?
You need
On Wed, Jul 16, 2014 at 09:52:43AM -0500, Peter A. Bigot wrote:
>
> Is any such framework available now or in development? If not, is
> anybody interested in joining me offline to discuss the requirements
> and design for such a thing?
Something like this very nearly happened as a GSoC project th
Oops. I forgot part of it:
def advance(lfsr, num):
for i in range(num):
nextbit = (lfsr & 1) ^ ((lfsr >> 5) & 1)
lfsr >>= 1
lfsr |= (nextbit << 8)
return lfsr
On Wed, Apr 30, 2014 at 10:38:54AM -0
Cool! In case either of you doesn't have this yet, here is an
implementation of the CC11xx whitening algorithm:
# XOR the output of this with a packet
def whitening(length):
lfsr = 0x1ff
white = 0
for i in range(length):
white <<= 8
white |=
My workflow in this case is to dump the output of Correlate Access Code
to a file and then write small Python programs to read that file. Yes,
the tools within GNU Radio for handling this kind of thing are getting
better, but they still haven't been as useful (to me) as a few lines of
Python here
On Fri, Apr 25, 2014 at 05:25:54PM +0400, Anton Komarov wrote:
>
> But when we have only positive values that means in fact we have 0.5
> DC offset, and that is bad. Moreover i've made test recording with
> GQRX - waveform is fine! Looking into the code, nothing special, am
> demod->low-pass->wav-s
On Fri, Apr 25, 2014 at 04:14:30PM +0400, Anton Komarov wrote:
>
> Hi, you can find in attach AM demodulator grc file. Everything is
> straight forward with demod but audio file generated looks weird. Only
> positive values of amplitude.
The particular definition of "amplitude" adopted by GNU Radi
On Tue, Apr 15, 2014 at 06:08:45PM +0200, Martin Braun wrote:
>
> But don't worry, WX widgets will be around for a while, but we won't
> be adding functionality, and will be officially marking them
> deprecated them (most likely) in 3.8. *Maybe* they will go away in
> 3.9, but that's a long way ahe
On Mon, Apr 14, 2014 at 01:25:48PM +0200, Andre Puschmann wrote:
>
> Attached is a screenshot of a GRC waveform I used to capture the
> preamble of a single packet. Channel 2 is simply the output of a
> quadrature demod block connected to a scope GUI block. I'd like to
> decode that into a sequence
On Thu, Apr 10, 2014 at 11:26:54AM -0600, Eric Schneider wrote:
>
> Is anyone doing a GnuRadio / SDR meetup in the Denver Area?
Count me in, but it may just be the two of us as usual. :-)
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On Wed, Apr 09, 2014 at 12:34:59PM -0600, Jay Radcliffe wrote:
>
> jay@ironfist:~/tpms-master/src$ ../src/extract_bursts.py
> ~jay/ping_903.020m_0.400m_20140403_00z_rtlsdr.cfile
> 19.6
> T: -256, 0
> handler caught exception: Wrong number or type of arguments for overloaded
On Thu, Apr 10, 2014 at 03:55:53PM -0400, Tom Rondeau wrote:
>
> I personally like this new method a lot.
I like the sound of it.
Mike
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Open source GPS signal generation would be quite valuable to the
information security community. See for example this nice paper that
shows how a GPS simulator can be used to explore the wireless attack
surface of GPS receivers:
http://users.ece.cmu.edu/~dbrumley/courses/18487-f12/readings/Nov28_
; -Original Message-
> > From: discuss-gnuradio-bounces+ralph=schmid....@gnu.org
> > [mailto:discuss-gnuradio-bounces+ralph
> <mailto:discuss-gnuradio-bounces%2Bralph> =schmid@gnu.org] On Behalf Of
> > Michael Ossmann
> > Sent: Wednesday, July 31, 2013 11:36 PM
Thanks, Farhad. I designed HackRF for 20 MHz with 8 bit quadrature
samples because it is at the maximum rate that can be transferred over
USB 2.0 (Hi-Speed). It's enough bandwidth for most SDR applications
I've seen. What applications do you have in mind?
On Wed, Jul 31, 2013 at 10:32:07PM +02
On Tue, Jul 30, 2013 at 11:57:09AM +0100, M Dammer wrote:
>
> This may lower security, but as the software we are working with is
> opensource anyway I do not see the need for encryption.
There have been attacks against users of open source software via
automated software update and installation m
On Tue, Jul 23, 2013 at 04:25:13PM +0100, David Goodenough wrote:
>
> I need to detect pulses that are single digit number of cycles long in
> the UHF band.
I think SDR would only be useful for this application at very high
sample rates (about 500 Msps or higher).
Mike
__
On Thu, Jun 20, 2013 at 09:55:29PM -0500, Crypto.Troop wrote:
>
> I would like to stay with the latest GNURADIO simply to support my
> HackRf board, in which the HackRf gr-osmosdr library seems to only
> support the latest version. I tried with 3.6.5 and it failed to
> compile...
The gr-osmosdr re
On Tue, Jun 18, 2013 at 11:55:42AM +0530, Rathinamala Vijay wrote:
>
> I am trying to install gr-bluetooth-0.4.
The latest release (0.4) is actually quite old (2010). Nobody worked on
it for a long time until recently. There has been some work done in git
to enable support with recent GNU Radio
On Thu, Jun 06, 2013 at 11:27:02AM -0400, Josh Blum wrote:
>
> A block that implements this conversion w/ a configurable scalar would
> be ideal.
That would be very nice. I've been using (for input from sc8 file to a
complex flowgraph):
UChar to Float -> Deinterleave => Float to Complex
Since m
On Fri, May 31, 2013 at 01:14:18AM +0200, Shashank Gaur wrote:
>
> The aim is to develop a bridge between GNU Radio and Wireshark which
> would result into analysis of packets.
I recommend contacting Mike Kershaw (dragorn of the Kismet project) and
Mike Ryan (known for recent work on Bluetooth Low
Registration is now open for the HackRF beta test. If you have an
invitation code from ToorCon 14 or the 2012 GNU Radio Conference, now is
the time to use it:
https://greatscottgadgets.com/forms/hackrf-beta-reg.html
HackRF beta units (Jawbreaker) will be shipped free of charge to
registered beta
On Tue, Mar 12, 2013 at 10:32:13PM -0700, john wrote:
>
> when i try running a .cc file of gr-bluetooth , i get certain errors
> that some .h files are not there and it results in fatal error...
>
> snigdha@ubuntu:~/gr-bluetooth/src/lib$ gcc bluetooth.cc
> bluetooth.cc:149:20: fatal error: Python.
On Sat, Jan 19, 2013 at 07:10:31PM -0500, Karan Talasila wrote:
>
> http://www.amazon.com/DVB-T-Receiver-Low-Cost-Software-Defined/dp/B008XFDHWW/ref=sr_1_4?ie=UTF8&qid=1358639740&sr=8-4&keywords=rtl+sdr
>
> http://www.amazon.com/Newsky-Receiver-Low-Cost-Software-Defined/dp/B008DCBS94/ref=sr_1_2?ie
On Sun, Dec 16, 2012 at 11:36:56PM -0500, Brian Padalino wrote:
>
> It's really just an SNR in a given bandwidth problem.
That makes sense. Looking back through the datasheet, I suspect that FM
demodulation is implemented by the PLL phase detector rather than by
bandpass filters.
___
On Sun, Dec 16, 2012 at 11:27:47PM +0100, Joanna Rutkowska wrote:
>
> Thanks for the detailed answer! I did some more study and my
> understating is that what you wrote above applies to (theoretical)
> coherent demodulation. AFAIU nearly all practical receivers use
> non-coherent demodulation (beca
On Tue, Sep 11, 2012 at 09:43:42PM -0400, John Ackermann N8UR wrote:
>
> Does anyone know of an image for a bootable Ubuntu or other Linux
> distro CD with the GRC stuff installed that's available for download?
The new Pentoo iso includes a GNU Radio build. I recommend trying the
beta:
http://pe
On Mon, Jul 02, 2012 at 08:27:01PM -0400, Andrew Davis wrote:
>
> Really cool presentation! Thanks for the info. Now i'm running into
> another problem, I sample at about 4MSPS for a bit and try to capture
> the signal as it passes though my window, but I never seem to get it,
> just a huge mess o
On Sun, Jul 01, 2012 at 04:01:48PM -0400, Andrew Davis wrote:
>
> So my plan is to somehow remove at least one stage of filtering from
> the FPGA so I can sample at ~4MSPS and have all out of band signals
> aliased into that bandwidth. My questions is can this be done and is
> my DSP info correct (
On Thu, Mar 01, 2012 at 09:47:55AM -0500, Tom Rondeau wrote:
>
> On Thu, Mar 1, 2012 at 9:42 AM, Jiri Pittner
> wrote:
>
> >
> > Hello,
> >
> > I have tried to compile gr-bluetooth (version obtained by git clone
> > git://gr-bluetooth.git.**sourceforge.net/gitroot/gr-**
> > bluetooth/gr-bluetooth
On Fri, Oct 28, 2011 at 08:06:40AM -0600, wallen wrote:
>
> Well, here is the code I cobbled together to do this. It is nothing
> fancy.
Though it can't be adapted as easily to more sophisticated processing as
your python code, I often use this one-liner to do the same thing:
$ od -fvw8 filename
On Mon, Sep 05, 2011 at 10:19:54AM -0400, John Ackermann N8UR wrote:
>
> I would think that you'd specify a bandpass filter around zero with a
> low cutoff of, say, -40e3 and a high cutoff of +40e3. However, this
> doesn't work -- the bandpass filter seems to require a number >0 for
> the lowpass
On Wed, Jun 01, 2011 at 07:08:20PM +0200, Matthias F?hnle wrote:
>
> https://www.cgran.org/wiki/Logitech27MHzTransceiver
Thank you for sharing this, Matthias. It looks like excellent work!
I didn't realize that Logitech had introduced AES-128 in any of the 2.4
GHz products. The non-Bluetooth 2.
On Sat, Mar 19, 2011 at 06:18:18PM -0500, Ricky A. Melgares wrote:
>
> The output from serial is most interesting, because the eth link speed
> changes to 1000 and then to 0 immediately after roughly every 3
> seconds.
Hey, Ricky. This behavior is typical of gigabit ethernet with a bad
cable or o
On Fri, Mar 04, 2011 at 02:35:53PM +0800, rono wrote:
>
> Could anyone suggest some books as very layman? Thanks.
Practical Signal Processing by Mark Owen is an outstanding book for
those new to the field. He introduces the use of complex numbers in the
first few pages instead of trying to avoid
On Wed, Mar 02, 2011 at 09:00:36PM +0900, Minsuk Kang wrote:
>
> That is, we are trying save all the samples of a packet (all complex
> values) and demodulate at once in a function at a receiver.
We do something somewhat like this in gr-bluetooth. See
bluetooth_multi_block.cc and its subclasses i
On Thu, Feb 24, 2011 at 02:06:41PM +0100, Kresimir Dabcevic wrote:
>
> and I presume that it also supports working in a 4-bit mode, which
> should allow for a 100 MHz bandwidth, which should be sufficient?
Oh, and perhaps this goes without saying, but 4 bits of dynamic range is
extremely low for d
On Thu, Feb 24, 2011 at 02:06:41PM +0100, Kresimir Dabcevic wrote:
>
> My name is Kresimir Dabcevic and am currently a masters student at
> M??lardalen University in Sweden, starting my masters thesis on
> Software defined radio.
Hi, Kresimir. I'm Michael Ossmann, one of
On Thu, Feb 17, 2011 at 05:05:09AM -0800, sumitstop wrote:
>
> Are there any books available where i can find detailed text and
> illustrations of GNU RADIO as well as practical USRP implementation
> examples.
This book doesn't cover GNU Radio or the USRP, but I'm a big fan of it
anyway:
Telecomm
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