set. Without some "killer
> app", ATSC 3.0 doesn't provide enough incentive to upgrade.
>
> But I could be wrong. :-)
>
> Ron
>
>
> On 12/27/2015 11:26 PM, Colby Boyer wrote:
>>
>> Hi GNURadio folks,
>>
>> Some portions of the candidate standa
Hi GNURadio folks,
Some portions of the candidate standard for ATSC 3.0 have been posted
to the ATSC website (http://atsc.org/standards/candidate-standards/),
and specifically the PHY/bootstrap sections are now available.
As far as I know there is no one working on a GNURadio version, but I
On Tue, Sep 2, 2014 at 10:09 AM, Mike Willis willis...@gmail.com wrote:
I am trying to develop a satellite ground station using the PSK
demodulator block. This works fine when tuned accurately. However, with low
satellites there is quite a bit of Doppler at VHF / UHF and there is also
some
Just saw this on the blogosphere, but no mention on the list I think. May
be an interesting addition to GNURadio?
http://www.pervices.com/about.html
--Colby
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Check out some of the publications by Fred Harris. He has written some good
stuff on sync. algorithms.
On Fri, Sep 9, 2011 at 5:48 PM, Tuan (Johnny) Ta ta.tu...@gmail.com wrote:
Thanks Marcus, that was very informative!
On Fri, Sep 9, 2011 at 8:00 PM, Marcus D. Leech mle...@ripnet.com wrote:
On Wed, Aug 17, 2011 at 10:50 AM, Nick Foster n...@ettus.com wrote:
On Wed, 2011-08-17 at 21:47 +0400, Alexander Chemeris wrote:
On Wed, Aug 17, 2011 at 21:15, Nick Foster n...@ettus.com wrote:
On Wed, 2011-08-17 at 18:00 +0400, Alexander Chemeris wrote:
Hi Nick,
On Sat, Aug 13,
On Tue, Aug 16, 2011 at 8:38 PM, Marcus D. Leech mle...@ripnet.com wrote:
**
On 08/16/2011 11:32 PM, Page Jack wrote:
my USRP N200 sometimes receive data wrong, I don't know where is the
problem in my application or
in hardware? So I wonder what ethernet protocol does usrp use and is it
As in CATV coax cable that cable companies use?
I think a TVRX daughter board should work as it covers most of the
frequencies used by a cable company.
--Colby
On Fri, Aug 12, 2011 at 5:22 AM, smith mark smith.mark1...@gmail.comwrote:
Hi all,
I want to know that if there is any possibility
On Tue, Aug 9, 2011 at 5:22 PM, Marcus D. Leech mle...@ripnet.com wrote:
Keep in mind the old information theorist's adage: if you don't have
bit errors, you're using too much power! (ok, I don't know how old
that is; fred harris always quotes it, but he credits someone else
with it,
On Sat, Aug 6, 2011 at 3:54 PM, Marcus D. Leech mle...@ripnet.com wrote:
**
On 08/06/2011 06:27 PM, shantharam balasubramanian wrote:
Hi
I have been working in usrp2 testbed, and I have been modifying the
benchmark_tx and rx programs for my project. There have been situations
where I was
On Wed, Aug 3, 2011 at 6:30 PM, Page Jack jack.page...@gmail.com wrote:
the code below is in sdr_lib/rssi.v I don't understand especially this
line: rssi_int = #1 rssi_int + abs_adc - rssi_int[25:10];
wire [11:0] abs_adc = adc[11] ? ~adc : adc;
reg [25:0] rssi_int;
always
On Mon, Aug 1, 2011 at 6:46 PM, Thomas Tsou tt...@vt.edu wrote:
On Mon, Aug 1, 2011 at 1:16 AM, Andre Puschmann
andre.puschm...@tu-ilmenau.de wrote:
I am afraid I can't get you the raw latency as we mainly did high-level
measurements on layer two and seven (using the ping command). So this
Hi all,
I'm running a duplex system on the USRP1; using UHD drivers (about 1 month
old). For the sample rates, I have 640KHz to the USRP and 1MHz from the
USRP. The turn around time for a simple amplitude detected signal is approx
20ms, which is crazy high. Btw, I'm measuring the latency (approx)
On Wed, Jul 27, 2011 at 4:16 PM, Thomas Tsou tt...@vt.edu wrote:
On Wed, Jul 27, 2011 at 1:23 PM, Colby Boyer colby.bo...@gmail.com
wrote:
Hi all,
I'm running a duplex system on the USRP1; using UHD drivers (about 1
month
old). For the sample rates, I have 640KHz to the USRP and 1MHz
This might be possible to do if both devices have access to the same and
very accurate clock, e.g. GPS.
What is your end goal?
On Tue, Jul 26, 2011 at 3:59 PM, Mattia Rizzi mattia.ri...@gmail.comwrote:
Hello.
I need to implent a two way ranging. A device send an “echo”, a second
device
from Linux)
between the received echo and the outgoing reply. I suggested a method to do
this task, can it work?
Thanks
*From:* Colby Boyer colby.bo...@gmail.com
*Sent:* Wednesday, July 27, 2011 2:17 AM
*To:* Mattia Rizzi mattia.ri...@gmail.com
*Cc:* discuss-gnuradio@gnu.org
*Subject:* Re
FYI. The GigE port on a T61 is compatible with the USRP2. I've used it two
or so years ago with one.
--Colby
On Wed, Jul 20, 2011 at 7:26 PM, Marcus D. Leech mle...@ripnet.com wrote:
**
On 07/20/2011 10:09 PM, Allen Vinegar wrote:
In the meantime, I had been advised about the subnet address
down to 798. However the next block has already
processed samples 0 to 798. It is now looking at 799 and forward. So the tag
never propagates.
-Colby
On Tue, Jul 19, 2011 at 5:03 PM, Tom Rondeau trondeau1...@gmail.com wrote:
On Mon, Jul 18, 2011 at 10:28 PM, Colby Boyer colby.bo
Try using a single pole IIR filter. If you don't know what an IIR is, wiki
it, better explanation there than from me. Keep pushing the frequency cutoff
to a lower frequency until the static gets better. If you go to far, your
audio should disappear.
On Tue, Jul 19, 2011 at 5:22 PM,
Say, I need a block to wait for some processing to finish down stream before
moving on to the next processing stage. Is it OK for me to stall in the
middle of the work function via a mutex? Or will this mess up the thread
scheduler.
Thanks,
Colby
___
Hi All,
I have seem to run into an issue with the stream tags and interp/decimation
processing blocks. When computing to add the tag to the proper output
offset, it always rounds down. In certain cases, computed offset is X.YZ,
where the first input item to the next block is at X+1. So the stream
The fractional interpolator works by shifting the phase through a block of
fractionally delayed filters. It rolls over every full sample.
It should be easy to put a method in that will advance this phase. Just add
some mutex around some of the variables.
On Fri, Jul 15, 2011 at 2:16 PM, Marcus
On Fri, Jul 15, 2011 at 8:07 PM, Marcus D. Leech mle...@ripnet.com wrote:
On 07/15/2011 10:16 PM, Colby Boyer wrote:
The fractional interpolator works by shifting the phase through a
block of fractionally delayed filters. It rolls over every full sample.
It should be easy to put a method
Hi All,
Do all blocks pass stream tags by default? Or do certain ones drop a stream
tag? I have an application where a downstream block searches for a tag added
by an up stream one, but it never finds the tag. =\
--Colby
___
Discuss-gnuradio mailing
Derp.
Nevermind, I'm stupid.
--Colby
On Fri, Jul 8, 2011 at 3:18 PM, Colby Boyer colby.bo...@gmail.com wrote:
Hi All,
Do all blocks pass stream tags by default? Or do certain ones drop a stream
tag? I have an application where a downstream block searches for a tag added
by an up stream
One method would be to use a single pole IIR filter to get an average of the
noise floor energy, and compare that with the average symbol energy.
On Wed, Jul 6, 2011 at 6:49 AM, George Sklivanitis
george.sklivani...@gmail.com wrote:
Hello all,
Lately, I am experimenting with a point-to-point
It'll probably ball park the figure. You can then cross-validate it with the
error rate.
On Wed, Jul 6, 2011 at 11:50 AM, George Sklivanitis
george.sklivani...@gmail.com wrote:
**
On 7/6/11 8:20 PM, Colby Boyer wrote:
One method would be to use a single pole IIR filter to get an average
On Tue, Jul 5, 2011 at 6:13 PM, Marcus D. Leech mle...@ripnet.com wrote:
Relatively simple flow-graph, not complete yet by any stretch of the
imagination.
It starts out innocuous enough, but really gets going after a while. The
RSS grows by about 150M/minute, the Virtual Size at a somewhat
On Tue, Jul 5, 2011 at 6:58 PM, Marcus D. Leech mle...@ripnet.com wrote:
Hi Marcus,
What are you using the vector sink for, I can't find anything that unloads
it? If you look at the source code, this block continuously calls
push_back on a STL vector container (element size is the GNURadio
On Tue, Jul 5, 2011 at 7:14 PM, Marcus D. Leech mle...@ripnet.com wrote:
**
Have you tried the polyphase filter channelizer blocks?
--Colby
Not clear to me how to use them to effect non-uniformly-spaced channels.
Also, individual channels will have their own bandwidths.
--
What sort of CPU are you using?
--Colby
On Tue, Jul 5, 2011 at 8:19 PM, Marcus D. Leech mle...@ripnet.com wrote:
On Jul 5, 2011, at 10:50 PM, Colby Boyer wrote:
Not clear to me how to use them to effect non-uniformly-spaced channels.
Also, individual channels will have their own bandwidths
I can borrow my lab mates N210 and see what kind of performance I can get
out of it on my T410 Thinkpad (i7 proc).
On Tue, Jul 5, 2011 at 9:12 PM, Marcus D. Leech mle...@ripnet.com wrote:
What sort of CPU are you using?
--Colby
AMD Phenom II X6 1055T, with 6GB of 1333MT/s memory. Rough
On Sun, Jul 3, 2011 at 8:16 AM, Tom Rondeau trondeau1...@gmail.com wrote:
On Thu, Jun 30, 2011 at 9:16 PM, Morgan Redfield redfie...@gmail.comwrote:
Hi,
I've been working on building a CSMA/CA MAC for the past couple of
weeks. I built it in Python, and used ofdm/tunnel.py as a guide. It's
Look at the source code used to generate the raised cosine, gr_firdes.h
should point to it. Making your own should follow directly from that; also
the wikipedia page on the raised cosine is also nice.
Its not black magic, so do not fear the source. :P
--Colby
On Tue, Jun 28, 2011 at 9:12 AM,
On Tue, Jun 28, 2011 at 4:48 PM, Minhoo Kim ki...@purdue.edu wrote:
Hello, I'm new to this mailing list and gnuradio.
sorry if I fail follow certain etiquettes..
what I'm trying to do now is to have a transmitter that hops around under
1ms, which needs to have 1MHz bandwidth and hop around
On Mon, Jun 27, 2011 at 11:02 AM, Tom Hendrick sdtom...@yahoo.com wrote:
I have a really simple question that I can't seem to find the answer to
online (and pardon my limited signal processing background). I'm trying to
help a fellow colleague figure out a processing problem.
An external
On Fri, Jun 24, 2011 at 4:54 AM, Tom Rondeau trondeau1...@gmail.com wrote:
On Thu, Jun 23, 2011 at 7:21 PM, Colby Boyer colby.bo...@gmail.comwrote:
On Thu, Jun 23, 2011 at 4:11 PM, Nick Foster n...@ettus.com wrote:
Where should I look for the API to tag samples on the USRP
On Fri, Jun 24, 2011 at 4:02 PM, Josh Blum j...@ettus.com wrote:
Maybe a better solution would be to use the UHD stream commands? Is it
possible to issue a sequence of stream commands and have them executed
serially by the USRP?
Example:
* Issue command to send Z samples at clock
The first thing to look at is the list of the GNU Radio dependencies (check
the wiki). All the ones related to the gnuradio core would need to be
ported. . .It probably will not be a trivial task.
--Colby
On Thu, Jun 23, 2011 at 1:36 AM, Amanullah agh...@ee.oulu.fi wrote:
Hi
** **
I
I'm a bit confused. What exactly are you trying to do?
On Thu, Jun 23, 2011 at 9:17 AM, Songsong Gee gee.songs...@gmail.comwrote:
Continueing with http://www.ruby-forum.com/topic/1983866,
I have planned to append a preamble before an actual signal and turn RX on
earlier than TX.
Then RX
Or operate your receiver at absolute zero so there is no thermal noise? :D
On a more serious note, how I do preamble detection is the following:
* Figure out the sample sequence of your TX'ed preamble sequence, use this
as a match filter.
* Tag the magnitude of the match filter and run through
On Thu, Jun 23, 2011 at 4:11 PM, Nick Foster n...@ettus.com wrote:
Where should I look for the API to tag samples on the USRP?
Tagging in this case has nothing to do with the USRP and everything to
do with Gnuradio. Take a look at the burst_tagger in
On Thu, Jun 23, 2011 at 8:32 PM, Marcus D. Leech mle...@ripnet.com wrote:
I'm working on a multi-channel radiometer, based on USRP2 with the
dual-DDC feature.
I'm trying to come up with channelizing structure that won't overwhelm
my CPU--I'm using
a 6-core Phenom II 1055T, with 4GB of
Hi All,
Anyone know how many bytes a signal processing block can buffer at the input
before an overflow occurs?
--Colby
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https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Have you installed the python-cheetah library?
http://www.macports.org/ports.php?by=librarysubstr=py26-cheetah
Never used macports before. . .
On Thu, Jun 16, 2011 at 8:46 AM, dave k dave_k_...@yahoo.com wrote:
osx macport install
mac:/ david$ gnuradio-companion
Xlib: extension RANDR
Your best bet is to build from source:
http://gnuradio.org/redmine/wiki/gnuradio/BuildGuide is a good guide and
covers Ubuntu 11.04 quite well.
On Wed, Jun 15, 2011 at 10:07 AM, John Ackermann N8UR j...@febo.com wrote:
After quite a while away, I'm trying to get gnuradio, grc, and uhd running
Hi Henry,
GNU Radio, as far as I understand, does not have a concept of time. It will
try to process samples as quickly as they are available. If your input
sample is arriving every 50mS then a sample should be produced by your block
shortly after the 50mS arrival mark.
What do you mean, the
GNURadio will indicates that overruns are occuring via the console. I
believe it is the u0 character.
On Mon, Jun 13, 2011 at 3:51 PM, John Andrews gnu.f...@gmail.com wrote:
Hi,
What happens to the incoming data from USRP, over the USB bus, when a
gnuradio block takes a lot of time to process
Is there one this month?
Thanks,
Colby
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There is a Viterbi encoder/decoder block called 'trellis' and it handles
hard and soft decoding. What you need to do is find the generating
polynomial or convolutional code that matches your needs.
--Colby
On Fri, Jun 10, 2011 at 1:27 PM, Shen Wenbo shenwenbosm...@gmail.comwrote:
Hi All,
I've taken a look at Gardner's text earlier and he does mention 3rd order
PLLs. Also, I found the text with the chapter by Harris. Good reference.
Thanks.
On Tue, May 31, 2011 at 6:16 AM, Tom Rondeau trondeau1...@gmail.com wrote:
On Sat, May 28, 2011 at 2:29 AM, Colby Boyer colby.bo
On Tue, May 31, 2011 at 5:59 AM, Tom Rondeau trondeau1...@gmail.com wrote:
On Tue, May 31, 2011 at 2:13 AM, Colby Boyer colby.bo...@gmail.comwrote:
Hi All,
Recently I've been using the MMSE interp filter. I found that when I shift
a signal by a fractional amount of 0 (or anything really
, 2011 at 4:25 PM, Colby Boyer colby.bo...@gmail.comwrote:
On Tue, May 31, 2011 at 5:59 AM, Tom Rondeau trondeau1...@gmail.comwrote:
On Tue, May 31, 2011 at 2:13 AM, Colby Boyer colby.bo...@gmail.comwrote:
Hi All,
Recently I've been using the MMSE interp filter. I found that when I
shift
On Tue, May 31, 2011 at 1:46 PM, Tom Rondeau trondeau1...@gmail.com wrote:
On Tue, May 31, 2011 at 4:37 PM, Colby Boyer colby.bo...@gmail.comwrote:
Related. It seems that this delay is not taking in account for the MM
clock recovery block? It some cases, this delay will not matter (2 or 4
Hi All,
Recently I've been using the MMSE interp filter. I found that when I shift a
signal by a fractional amount of 0 (or anything really), the signal goes way
off! I would expect SOME difference, but not this much...
Some example output.
Mu:0 In:(-1.67869,0.480381) Out:(0.0418351,-0.16734)
On Sun, May 29, 2011 at 1:22 AM, Alexander Chemeris
alexander.cheme...@gmail.com wrote:
On Sun, May 29, 2011 at 03:05, Marcus D. Leech mle...@ripnet.com wrote:
On 05/28/2011 04:28 PM, Alexander Chemeris wrote:
So, while this method is simple and good for non-realtime
applications, it doesn't
On Sat, May 28, 2011 at 6:50 AM, Tom Rondeau trondeau1...@gmail.com wrote:
On Wed, May 25, 2011 at 3:16 PM, Marius wishi...@googlemail.com wrote:
Hi!
- To my background there's to say - before you read this - I'm just a
software-dev. I have little expertise when it comes to hardware.
I
On Fri, May 27, 2011 at 2:31 PM, Jeff Brower jbro...@signalogic.com wrote:
Marcus-
Alexander is asking excellent questions and I'm surprised at the tepid
response -- he's got like 4 replies so far? He's the prototype GNU
radio user who needs to maintain his group's IP, he should be
receiving
Isn't the main difference between v2 and v3 the Tivo Exception as
the call it? Not sure.
I guess I should add IANAL. TINLA.
:P
On Fri, May 27, 2011 at 3:32 PM, Marcus D. Leech mle...@ripnet.com wrote:
How do the companies write closed-source drivers for the Linux Kernel
without running into
Hi All,
Recently, I've gone down the road of timing synchronization and ended
up learning basics for PLLs and such. So far in GNURadio, it seems
that the loop filters used in the existing GNURadio synch blocks are
only first order. From what I understand, increasing the filter order
of the PLL
On Tue, May 24, 2011 at 3:13 AM, Tom Rondeau trondeau1...@gmail.com wrote:
On Mon, May 23, 2011 at 10:37 PM, Ben Reynwar b...@reynwar.net wrote:
On Mon, May 23, 2011 at 12:09 PM, Josh Blum j...@joshknows.com wrote:
On 05/23/2011 03:29 AM, Vlad Stoianovici wrote:
Dear Marcus and Bob,
Hey Guys,
It seems that the USRP1 out with UHD is normalized to 1.0, vs some big
number as with the old USRP drivers. I assume this is correct?
Otherwise my cards are not kicking out any RF power.
--Colby
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Hi Tom,
I tried running the uhd_fft.py script with the USRP1, but I run into
an error with
RuntimeError: LookupError: KeyError: cannot set this property
in void usrp1_impl::mboard_set(const wax::obj, const wax::obj)
at /home/csboyer/uhd/host/lib/usrp/usrp1/mboard_impl.cpp:392
due to a call
On Mon, May 16, 2011 at 6:22 PM, Josh Blum j...@ettus.com wrote:
On 05/16/2011 05:26 PM, Colby Boyer wrote:
Hi Tom,
I tried running the uhd_fft.py script with the USRP1, but I run into
an error with
RuntimeError: LookupError: KeyError: cannot set this property
in void usrp1_impl
On Mon, May 9, 2011 at 11:21 AM, Alexander Chemeris
alexander.cheme...@gmail.com wrote:
On Mon, May 9, 2011 at 21:29, Jeff Brower jbro...@signalogic.com wrote:
What I think might translate for GNU Radio is to find ways to support more
types of platforms. What about a small
USRP for smart
On Mon, May 9, 2011 at 1:49 PM, Michael Dickens m...@alum.mit.edu wrote:
On May 9, 2011, at 4:42 PM, Marcus D. Leech wrote:
Gnu Radio, to me, is a DSP engine that happens to live on a general-purpose
compute platform.
True. But the GNU Radio model is build on data-flow, while the Octave
See http://www.ettus.com/uhd_docs/manual/html/usrp2.html
On Wed, May 4, 2011 at 9:44 PM, hafiz zimran zimra...@yahoo.com wrote:
Hi
I am trying to install UHD driver on SD card (USRP2) using Ubuntu 10.04.
I have downloaded the Source code
Check top when running a simple data sink or source. If the CPU is
pegged, maybe that is the limiter, if not there is a memory bottle
neck somewhere.
On Tue, May 3, 2011 at 8:25 AM, Alexander Chemeris
alexander.cheme...@gmail.com wrote:
Hi Josh, Philip,
On Sat, Apr 23, 2011 at 17:05, Philip
Hi Ranjini,
Asking a question in ALL CAPS is a poor way to get a response, if any.
Certainly, if the question is very vague and open ended.
http://en.wikipedia.org/wiki/Frequency_modulation is how FM works. If
you understand how GNURadio and the USRP work together, it should be
straight forward.
Marcus,
Speaking on the topic of calibration. Has anyone characterized the
performance of the Ettus daughter cards, i.e. noise floor and
freq/volt measurements to card output?
--Colby
On Thu, Apr 28, 2011 at 6:41 AM, Marcus D. Leech mle...@ripnet.com wrote:
On 28/04/2011 7:38 AM, Patrik Tast
http://people.csail.mit.edu/szym/rawofdm/
I found this a little bit a go. Never tried it though.
--Colby
On Wed, Apr 27, 2011 at 8:00 AM, Nemanja trecakov...@hotmail.com wrote:
Sankalp Nimbhorkar sankalp.nimbhorkar at gmail.com writes:
Hi all, Can anyone provide pointers from
Hi All,
My lab is interested in purchasing some USRPs. It is pretty settled
that some of the boards will be the N2x0 series, but I am interested
to hear from people who have used the E1x0 boards. From what I can
tell, the E1x0 board should have better latency performance than the
N2x0 and should
Hi All,
In RFID applications, a reader receives (backscatter from RFID tag) and
transmits (constant tone) at the same frequency. With commercial readers, a
single LO will be shared by the RX and TX chain. However, in the USRP case,
two separate daughter boards are used so different LOs are in use
:
On Tue, 19 Apr 2011 11:41:46 -0700, Matt Ettus m...@ettus.com wrote:
On 04/19/2011 11:38 AM, Colby Boyer wrote:
Hi All,
In RFID applications, a reader receives (backscatter from RFID tag) and
transmits (constant tone) at the same frequency. With commercial
readers, a single LO
,
-Vijay
--- On *Tue, 4/19/11, Colby Boyer colby.bo...@gmail.com* wrote:
From: Colby Boyer colby.bo...@gmail.com
Subject: Re: [Discuss-gnuradio] Odd use of LO phase lock feature on USRP
for RFID application
To: i...@agile-sdr-solutions.com
Cc: Matt Ettus m...@ettus.com, GNU Radio
http://www.gnu.org/software/gnuradio/doc/exploring-gnuradio.html#fm-receiver
Granted this example is a bit outdated, but should help. Also, see
http://srg.cs.uiuc.edu/swradio/gnuradio/fm-xceiver.html
Basically, use google - which is how I found these.
--Colby
On Sat, Apr 9, 2011 at 8:47 AM,
Has anyone attempted to attach the RX/TX path of a daughter board to a
circulator. This is so that in a half duplex system, both paths can share
the same
antenna.
I am interested in capturing some of the phase noise leakage effects.
Has anyone attempted this?
Colby Boyer
Sent with Alpine
The communication protocol that you are looking into should have a
predefined symbol rate. At the very least in the pilot sequence of a frame.
--Colby
2010/9/18 intermilan tianxia...@hotmail.com
hi Tom:
thank you for your answer,I get it .Besides, how do we know the
symbol rate if
be found
under
http://ettus-apps.sourcerepo.com/redmine/ettus/projects/uhd/wiki
The last change for the USRP1 FPGA code is from 5 months ago, but I think
the latest code should be there.
Matthias
Am 09.09.2010 um 07:44 schrieb Colby Boyer:
Hi all,
I searched through the mailing lists
Hi all,
I searched through the mailing lists and there is not much of a consensus on
the location of the latest base FPGA code. The repo I found was git://
ettus.sourcerepo.com/ettus/fpga.git
Is this the FPGA code used in the new UHD drivers? If not, can someone be
kind enough to point me in the
On Mon, 16 Aug 2010, Jonas M. Börner wrote:
Hi all,
I am trying to use the convolutional encoder and Viterbi provided by the
gr-trellis class within another environment. I have my own mapper and de-mapper
blocks which I want to use. So I tried to use the feed the viterbi_combined
with this
one else care to comment?
--Colby Boyer
I have not used the GNU Radio trellis before. In the past, I have only
used the the matlab trellis and I remember I had to deal with truncating.
--Colby___
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Hi Elvis,
What I recall from a presentation Ettus gave was that you can integrate
matlab with the USRP2; you have to write the drivers for the matlab/USRP2
interface. So it is possible.
I don't have any further details, sorry. Maybe try looking for driver
tutorials for matlab?
--Colby
On Fri,
I do not remember specifically what I used at the command line to get the
two USRP2s to talk to each other. I know I had it working for 1 and 2 Mbps.
I think something must be messed up with the spreading sequence. George,
wasn't there a discussion on that sometime ago? I remember there were plots
Has anyone attempted to try this on the USRP or know of any successful
projects? Or if anyone has a good paper to suggest on measurement methods,
that would be great.
I imagine that the timing synchronization would be difficult on the USRP. ?
Thanks
I'm not too familiar with the naming conventions and I could not find a
reference to the FLEX900 and the Ettus research website.
If they are different, is the frequency tuning range different?
Thanks,
-Colby
___
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If someone writes a Fast Walsh Transform block, then 5.5 and 11 Mbit is
possible. Only a few changes need to be made to the MAC block to accommodate
this change.
Getting G (OFDM) to work seamless with B will be be a bit difficult I think.
You are then switching rates, 20 MHz vs 11 MHz if I
If those are the post-spread samples, then I think that makes sense. The
barker spreading code randomizes(appears) everything.
Have you tried decorrelating with the matched filter? If that results in two
tight constellations then all is good.
On Sun, Nov 22, 2009 at 10:26 PM, George Nychis
I think that is a buffer overrun. In otherwords, your computer cannot
process the data fast enough.
On Fri, Oct 2, 2009 at 1:36 PM, Chen Chen morningchen1...@gmail.com wrote:
Hi, everyone,
I just got two set of USRP2 and want to test it using the bbn 802_11b
usrp2_version. I use the example
If you are running the USRPI version of the BBN code, then you need to
download an older version of GNU Radio. GNURadio has changed a bit since
the BBN code was originally released.
Please read this https://www.cgran.org/wiki/BBN80211 to correctly setup the
work environment.
Hope this helps.
BBN is this company http://www.bbn.com/. They are an American defense
research company that does a lot of work for DARPA.
A while back they had a contract (DARPA i think) to write 802.11b software
for GNURadio and the USRP I. That software is what we call bbn 802.11.
However that contract has
Från: Colby Boyer [mailto:colby.bo...@gmail.com]
Skickat: den 26 augusti 2009 05:09
Till: Ulrika Uppman
Kopia: GNU Radio Discussion
Ämne: Re: [Discuss-gnuradio] fundamentals of block-connections, message
queue etc.
Within the BBN RX side, all the processing blocks are stuck
Within the BBN RX side, all the processing blocks are stuck together so that
data streams from each block to the next. In the final block, when a
packet is successfully decoded it is loaded in a message queue. The loading
into the message queue is done within the C++ code, not the python.
There
Yes.
There should be a a test.py file in the same directory as the tx and rx .py
files.
Basically this connects the RX to TX complex in/out ports together. You can
add in white noise and channel fading by processing the output of the TX
before the RX. Take a look and email if you have more
There should be an example in blk2impl directory.
On Tue, Jul 14, 2009 at 5:16 PM, Muhammad Abrar mabrarb...@gmail.comwrote:
i want to do DBPSK modulation on 16 KHz Carrier, but didi not fine any
option to set carrier frequency in DBPSK block in GRC or in dbpsk.py. Please
guide me.
second
Correlation doesn't always return real numbers, only if its the correlation
of the same the PN sequence(including phase). The received signal could
have a phase shift, complex numbers are needed.
On Mon, Jul 13, 2009 at 8:48 AM, Jordan J Riggs jjrigg...@gmail.com wrote:
I'm not an expert on
You can read the files with Matlab or Octave.
http://www.mail-archive.com/discuss-gnuradio@gnu.org/msg09567.html
This should explain it.
On Sun, Jul 5, 2009 at 8:14 PM, radul...@eecs.utk.edu wrote:
Hi,
I am trying to use C++ to read data from the USRP. I've compiled an
example found at the
Thats cute.
I am serious though.
On 6/24/09, Daniel O'Connor dar...@dons.net.au wrote:
On Wed, 24 Jun 2009, Colby Boyer wrote:
Say from 100MHz to 88MHz?
Have you purchased a flux capacitor from Ebay?
:)
--
Daniel O'Connor software and network engineer
for Genesis Software - http
This question is relating to the USRP2. I apologize for leaving that detail
out.
On Wed, Jun 24, 2009 at 6:33 AM, Colby Boyer colby.bo...@gmail.com wrote:
Thats cute.
I am serious though.
On 6/24/09, Daniel O'Connor dar...@dons.net.au wrote:
On Wed, 24 Jun 2009, Colby Boyer wrote:
Say
. Just
seeing if there was a short cut ;).
Thanks for your feed back Matt.
On Wed, Jun 24, 2009 at 1:12 PM, Matt Ettus m...@ettus.com wrote:
Colby Boyer wrote:
Say from 100MHz to 88MHz?
You would need to change out the oscillator. There are pin compatible ones
with some other frequencies
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