I just added the blks2.ofdm_mod/demod blocks to GRC in the gnuradio
trunk. svn up!
The generated code looks a bit odd... but so are the OFDM blocks:
- options class containing parameters to ofdm mod and demod (why not
*args and **kwargs?)
- no input stream to ofdm mod, has a send_pkts
Hi,
Can anyone give me the reference to the algorithm implemented for the slicer
in bbn_80211? I understand how the code works but I want to know the basis
behind this algorithm. Can I find any textbook or paper that supports this
implementation?
Thanks,
Ali
Cocuzzo, Daniel C. wrote:
I'm also wondering about how to extract ethernet packet information,
such as timestamp. If anyone has any pointers to reference materials
it would be greatly appreciated.
Hi,
As far as I know, there is a timestamp- field in the ethernet- packet
header. Look in
hi all,
I want to record for example a fir filter output
to file when I want. I have develop basic application,
given some parts below
.
.
def start_record_samples (self):
self.stop()
self.utfil = gr.file_sink(gr.sizeof_float,capture.cfile)
Hi,
it seems there's a bug in gr-howto-write-a-block.
The swig call in src/lib/Makefile.am is defined as
howto.cc howto.py: $(ALL_IFILES)
$(SWIG) $(STD_SWIG_PYTHON_ARGS) -module howto \
-o howto.cc $(LOCAL_IFILES)
but STD_SWIG_PYTHON_ARGS is never defined in that
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Cocuzzo, Daniel C. wrote:
I'm also wondering about how to extract ethernet packet information,
such as timestamp. If anyone has any pointers to reference materials it
would be greatly appreciated.
Thanks,
Dan
The easiest way (depending on
I was contemplating trying to use the timestamps and 4 antennas on the
same usrp{1,2} to try and create a smart antenna array for DOA...
Dimitris Symeonidis
If you think you're too small to make a difference, try sleeping with
a mosquito! - Amnesty International
On Thu, Mar 12, 2009 at 15:51,
Hi!
I am trying to write a program in C that interfaces between USRP and
Windows, this is my initial code:
#include usb.h
#include usrp_spi_defs.h
#include usrp_commands.h
#include fpga_regs_standard.h
#include ad9862.h
#include usrp_interfaces.h
#include stdio.h
#include math.h
#define
Scenario 3 - An arbitrary number of USRP2 systems, no MIMO cables,
no HUB
Some means of providing the same 10 MHz reference to all USRP2 systems
must be set up. Typically this would be the 10 MHz output of some lab
reference like a GPS-locked reference. That reference would be put
through some
Hello Eric,
I late to reply to your email. I have set the paths according to the
installation.
However, I still can not listen to any radio signal.
I just found out that I need TVRX in order for me to receive the FM radio.
Thank you
On Mon, Mar 9, 2009 at 10:39 AM, Eric Blossom e...@comsec.com
On Wed, Mar 11, 2009 at 11:44:59PM -0700, yyzhuang wrote:
Hi,
Has anybody got this error when running tunnel.py in gnuradio-example (with
virtual IP addresses set up on two PCs and ping each other on this tunnel)?
./gr_buffer.h:125: unsigned int gr_buffer::index_add(unsigned int,
Hi Everyone:
I am guessing that my last post was not clear since I didnt get any replies.
So here I go again.
1. I am using two Flex900 daughter cards on a single USRP.
2. I am getting to select two subdevices (0,0) and (1,0) ie. daughter board
A or daughter board B
3. On each subdevice I am
Hi Eric,
The command line: sudo ./tunnel.py --freq 2.44G --bitrate 500k -v (is
bitrate has something to do with buffer?)
I installed GNU Radio from here: svn co
http://gnuradio.org/svn/gnuradio/branches/releases/3.1 gnuradio
I never had that buffer problem before I moved the 2 boxes to
On Thu, Mar 12, 2009 at 09:40:29AM -0700, sHabzbd wrote:
Hi Everyone:
I am guessing that my last post was not clear since I didnt get any replies.
So here I go again.
1. I am using two Flex900 daughter cards on a single USRP.
2. I am getting to select two subdevices (0,0) and (1,0) ie.
On Thu, Mar 12, 2009 at 09:03:23PM +0500, Ujala Qasim wrote:
Hi!
I am trying to write a program in C that interfaces between USRP and
Windows, this is my initial code:
...
However, the claiming of interface always fails on bulk_udh. Please guide me
in this regard as to what I am doing
Hi All,
I am using benchmark_tx.py and benchmark_rx.py to transmit and receive a
file. At the benchmark_tx.py, by setting the value of -M, the transmitter
process is terminated when the total transmitting packages size is larger
than M*1e6. When the transmitter stops, the receiver stops
Hi,Well I am implementing the given task by picking up selected function
from usrp_prims, usrp_standard, usrp_basic and fusb_generic etc in a program
of my own. As these are just simple classes which define particular
functions, I was confused and could not very much clearly understand that in
Hi,
I have installed the OpenBTS by following the instructions on the page below:
http://www.gnuradio.org/trac/wiki/OpenBTS/BuildingAndRunning
Apparently there were no errors in all the process (ie: ./bootstrap,
./configure, make, make install)
But i can only see Asterisk folder in
the following excutables are in the openbts folder you svn'ed after
you do a make. they are not copied to the dist with make install, not
sure why, but they work...
openbts/apps/OpenBTS800
openbts/apps/OpenBTS900
openbts/Transciever/transciever
On Thu, Mar 12, 2009 at 3:41 PM, Gohar
Hi, I am just getting started in GNU Radio, and I was having some trouble
getting libcomedi 0.7.22.2-2 to work in Ibex.
the libcomedi-0.7.22 is packaged for hardy, which is replaced by libcomedi0
in intrepid ibex.
The deb files for GNURadio 3.1.3 we're written for hardy, they haven't been
I late to reply to your email. I have set the paths according to the
installation.
I think the real problem was the python2.4 on the first line. You
have probably installed gnuradio with 2.5.
However, I still can not listen to any radio signal.
I just found out that I need TVRX in order for
Hi jose
I try to find out ofdm block but it want appear there.
May by I am looking at wrong place.
here the path where i looked
http://gnuradio.org/svn/gnuradio/trunk/grc/examples/
thanks for guidance
___
Discuss-gnuradio mailing list
hi tusear,
I added the OFDM mod and demod to the Modulators category in the GRC
gui. However, there are no OFDM examples for GRC.
A quick loopback test to let you know that the blocks work:
signal source - ofdm mod - ofdm demod - throttle - scope sink or fft
sink
Tushar Patel wrote:
Hi
Thanks for the guidance here. I'd actually like to save timestamps to a file,
along with data - it sounds like this would require not only a custom copy
handler but also a custom source block to pass the timestamp up to the flow
graph. Am I on the right track here?
I'm not sure I totally
Hi all,
I would like to build a base station with multi-standards (WiFi, GSM, WCDMA,
etc.). For the first step, I want to build this base station based on OpenBTS
and BBN 802.11 projects. The OpenBTS works well with USRP1 and people are
making BBN 802.11 work with USRP2, so I want to connect
If the USRP1 and the USRP2 can work on the same host at the same time, can
the USRP1 and the USRP2 work synchronously (can they have the same clock or
common time reference?)? Some discussions mentioned the synchronization of
two USRP2, but I cannot find discussions about synchronization of
I noticed some changes in the build system recently, such as the
introduction of STD_SWIG_PYTHON_ARGS. Perhaps the mini-build-subsystem
of gr-howto just needs the same updates?
I neglected to update the howto's Makefile.common during the last
update. I have another update in the queue that
Hi all,
Is anyone working on 802.11 with USRP2 ? In
https://www.cgran.org/browser/projects , I found two projects, span_80211b and
bbn_80211; however, they have not been changed for months. Does anyone know any
projects are working on 802.11 with USRP2?
Thank you,
Jane
On Thu, Feb 19,
Thanks for your reply Davek,
In openbts/tests its written in README.test that
Tests that can be built and run.
L1 Software Loopback (no USRP)
This test exercises L1 components for bidirectional channels. It uses two
executables: TRXManager/LoopbackTest and TRXManager/TRXSimulator.
also
this has been discussed before, but i cant find the solution...
im wondering if there is options i need to pass to grc to make it more
resposive while running. A simple grc flowgraph connecting a USRP
source to a FFT sink works fine, but is unresponsive to any input,
eventually ubuntu will pop up
I have installed Gnuradio-3.1.3 on Red Hat Enterprise Linux-4.The
installation of gnuradio was successful.Even I have got USRP connected
and have loaded the firmware.
But when I try to run the given examples of gr-utils for example
usrp_fft.py i get the following error:-
[r...@localhost python]#
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