plz did you know an open source project to get inspired of it in order to
receive/ transmit datas from USRP E110
2014-05-11 21:09 GMT+02:00 Wafa Elhajhmida wafa.elhaj.hm...@gmail.com:
thanks a lot for your quick response .
In fact I want to implement an application :OFDM transceiver with
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Hi Wafa,
the OFDM Code in GR is a very good start for data transmission. Also
in [1] in the examples folder you can find a
mimo_ofdm_transceiver.grc. It is a transceiver with which it is
possible to establish an IP connection between to computers. It
On 04/30/2014 05:17 PM, David Halls wrote:
Sorry, my fault - I altered the FDE so it *does* give soft outputs,
because the constellation decoder makes hard decisions anyway - so I
didn't see the need for it to be done twice.
How exactly have you implemented that?
I forgot i'd made changes :s
On 30.04.2014 11:51, David Halls wrote:
Hi Martin, All,
Has anyone noticed that the final symbol of any burst (no matter how
many packets in a transmission) appears slightly 'noisy' in the OFDM
example code? Is it something to do with my set-up?
I attach a picture of the eq'd FD constellation
Hi Martin,
This is OTA or over a cable, 2.48GHz using the N210 with XCVR2450. The results
I sent are over a cable, and the results I sent are post equalizer.
It is only the final symbol of a burst, not the final symbol of each packet.
I agree they should all be equally noisy, and I am certain
On 30.04.2014 13:14, David Halls wrote:
Hi Martin,
This is OTA or over a cable, 2.48GHz using the N210 with XCVR2450. The
results I sent are over a cable, and the results I sent are post equalizer.
Which equalizer are you using? A custom one? Those in GNU Radio aren't
fantastic, and they
Hi,
It's just the built in basic FDE. Its not awesome, but works well enough at
high SNR.
Yes, when I send multiple packets, its only the last OFDM symbol of the last
packet that is affected.
I have tried suffixing FFT_len/4 (i.e. 16 = CP) lots of 0's in the TD at the
transmitter, and this
Hi Martin,
Setting the rolloff factor in the cyclic prefixer to CP_len (16 samples) fixes
the problem?! Previously I had rolloff = 0.
Any thoughts?
DH
From: Martin Braun [martin.br...@ettus.com]
Sent: 30 April 2014 14:56
To: David Halls;
On 30.04.2014 16:03, David Halls wrote:
It's just the built in basic FDE. Its not awesome, but works well enough
at high SNR.
Hm, the FDE doesn't output soft info, so I'm stumped why you'd see
anything other than clean constellation points in the first place.
Yes, when I send multiple
Sorry, my fault - I altered the FDE so it *does* give soft outputs, because the
constellation decoder makes hard decisions anyway - so I didn't see the need
for it to be done twice.
I forgot i'd made changes :s But now maybe I understand why people haven't seen
this issue - because they have
On 04/21/2014 09:02 PM, Jonathan Fox wrote:
Hey list, another OFDM question.
I have this simple OFDM script I have used before and in between USRPs I
have VHF handheld radio I am using as an interferer (also have plenty of
attenuation, between USRPs it is about 30 dB and the handset is
Hi all,
(Ubuntu 1304 gnuradio 3.7)
I want to test OFDM in gr_digital using tx_ofdm.grc and rx_ofdm.grc.
(simultaneously using usrp n200 devices)
Where are UHD source and sink in that flow g.?
Since I do not want to add them myself, I want to see how the original system
works.
Do you know
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Hi Nasi,
these Flow Graphs are simulation graphs; there is no hardware
sinks/source in there, obviously.
But you can easily make these flow graphs real hardware transmission
flow graphs.
You see the channel model/throttle block? That's where reality
On 04/10/2014 01:33 PM, Piotr Potocki wrote:
First thanks for helping me out!
1. I found out that in file 'ofdm_equalizer_simpledfe' there is a part
concerning mapping samples into correct positions (-1,1).
//
d_constellation-map_to_points(d_constellation-decision_maker(sym_eq),
On 03/31/2014 01:03 PM, Piotr Potocki wrote:
1. I want to estimate SNR using IQ samples. But when I receive IQ
samples on the receiver (img iq_samples_eq) they are all perfect. So
my first question is, is there some kind of hard decision in OFDM
Frame Equalizer? Without OFDM Frame Equalizer
I want to simulate an OFDM link to carry 214 bytes per Ethernet packet
implement it using 2 laptops running GNU 2 USRPs.
Each USRP is a TX RX .(FULL-DUPLEX)
I calculated all OFDM parameters needed.
total BW=200KHz
sample Rate=240k
symbol time including CP=5ms= 8-burst gsm ( one burst is 0.6ms)
Hi Sara,
Please look at the OFDM TX/RX examples in GNU Radio Companion. It's already
there for you. :)
best,
aditya
On Tue, Mar 18, 2014 at 8:44 PM, Sara Chérif saracheri...@gmail.com wrote:
I want to simulate an OFDM link to carry 214 bytes per Ethernet packet
implement it using 2
Hi there,
I am trying to implement an OFDM transceiver, based on the existing GNU
Radio OFDM blocks, for a cognitive communication system.
How can I update the occupied_carriers mapping (turn on/off carriers)
while the flow-graph is running (in the carrier allocator and other
On 02/24/2014 06:16 PM, Germano wrote:
Hi there,
I am trying to implement an OFDM transceiver, based on the existing GNU
Radio OFDM blocks, for a cognitive communication system.
How can I update the occupied_carriers mapping (turn on/off carriers)
while the flow-graph is running (in the
Hi Piotr,
I was facing the same issue, and the issue is caused by Schmidl-Cox
sometimes detecting the packet boundaries a little late. This cannot really
be helped, as channel noise may force the correlator to detect a
peak/plateau later than it should. I have found a couple of ways to
overcome
Hi everybody.
(I had some problems with In-Reply-To header, so I hope this gets posted
in the right thread. Otherwise I'm sorry, this message refers to
http://lists.gnu.org/archive/html/discuss-gnuradio/2013-12/msg00392.html)
Thank you for your answer, Martin.
Martin Braun wrote:
I'm not
Hello everybody,
I'm trying to do some channel measurements using a setup based on three
PCs with two USRP2 devices (equipped with RFX2400 daughterboards) and
GNU Radio 3.7.
One of the PCs acts as network controller, it creates data the other PCs
should transceive. The network controller
Dear all,
In OFDM transmitter example there is Stream to Tagged Stream block with
packet length value 96. What it's mean? And whether the value claim specific
standard?
Thanks,
Ahmad___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
On Thu, Dec 12, 2013 at 08:27:19PM +0800, ZaInzAiN Jj wrote:
This is OFDM transmitter grc file
On Thursday, December 12, 2013 7:22 PM, ZaInzAiN Jj zain_zain...@yahoo.com
wrote:
Dear all,
In OFDM transmitter example there is Stream to Tagged Stream block with
packet length value 96.
Hi all,
I just updated the examples in gr-digital/examples/ofdm using the
feedback I got the last couple of weeks. They're in the current master,
so if you want to check them out you probably need to git pull first.
Some notes on the examples:
- ofdm_loopback.grc is probably where you want to
hi community,
can we do these examples without using the length tags.. if so please let
me know the way.. looking forward for reply.
thanks,
lingeswar
___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
On Wed, Oct 02, 2013 at 08:02:55PM +0530, lingeswar kandregula wrote:
hi community,
can we do these examples without using the length tags.. if so please let me
know the way.. looking forward for reply.
You could rewrite the blocks for fixed lengths. Out of the box, no, you
can't dispense
Hi,
I'm doing an OFDM radio system with GRC. I have built the whole system. the
output of transmitter looks good, but the output of OFDM demodulation block
has no waveform. Can anyone help me ? untitled.grc
http://gnuradio.4.n7.nabble.com/file/n43432/untitled.grc OFDM.png
I am trying to find channel coff. through ofdm implementaion. I added and
edited the ofdm frame acquisition block and set verbose to 1. I get wrong
cooff. so i think added wrong blocks, can anyone help me with blocks to
add.
___
Discuss-gnuradio mailing
Hi,
I am trying to see ofdm_frame _acquisition.cc code. Here to find the
training symbol phase difference, the code subtracts one symbol from
another and takes norm function like norm(symbol[i]-symbol[i+2]). But how
will that give the phase difference. Now symbol[i] and symbol[i+2] are
complex
Hi,
I am trying to understand ofdm demodulation using schmidl and cox paper.
Can anybody explain how a pn sequence on even frequencies and 0 on odd
frequencies help in the estimation of timing and frequency offset.
--
Regards
Karan Talasila
___
On Wed, Apr 17, 2013 at 6:30 AM, Karan Talasila karan@gmail.com wrote:
Hi,
I am trying to understand ofdm demodulation using schmidl and cox paper.
Can anybody explain how a pn sequence on even frequencies and 0 on odd
frequencies help in the estimation of timing and frequency offset.
Hi everybody,
I have been experiencing some difficulties in obtaining
the same signal clarity performance that I used to have with
uhd_003.004.000-f500b92
when I tried to transmit the same samples of the same signal
(also same usrp B100, same XCVR2450 front-end, same frequency =5.8GHz, same
On 04/15/2013 03:39 PM, Vincenzo Pellegrini wrote:
Hi everybody,
I have been experiencing some difficulties in obtaining
the same signal clarity performance that I used to have with
uhd_003.004.000-f500b92
when I tried to transmit the same samples of the same signal
(also same usrp
hi Josh,
thanks for the very prompt answer.
Will run the tests you suggest tomorrow morning (CET) and let you know.
As to the power, the receiver measures the very same received power value
in both cases. You can see this from the (first from top) bar indicator on
the instrument in the two pics.
Hi guys,
Thanks in advance. Can anyone tell me where the *channel estimate block* is
in *ofdm* example? I want to extract the channel estimate value *H
*I am trying to locate it, but still get lost. I believe that it should be
after FFT process, is that right?
Best,
Kay
On Mon, Mar 18, 2013 at 9:31 AM, Yingjie Chen ocg...@gmail.com wrote:
Hi guys,
Thanks in advance. Can anyone tell me where the channel estimate block is in
ofdm example? I want to extract the channel estimate value H
I am trying to locate it, but still get lost. I believe that it should be
Hi everyone, I am newbie on gnuradio and I have a question about ofdm
benchmark. If I use benchmark_tx.py and benchmark_rx.py I have a good
performance, (an error rate below 10%).
However, if I only modify the benchmark_tx.py and I add only a
time.sleep(1) between send_pkt(payload) like is
Hi,
I use an USRP1 together with gnuradio/GRC and would like to transmit an OFDM
signal, abt. 1 MHz bandwidth at 433 MHz. The FFT display block within GRC
shows the power mask as expected, a flat line over the bandwidth, and steep
drops at both ends. What a real spectrum analyzer at the output
You are probably using an odd interpolation ratio. You need to use an even
rate in order to get a flat passband.
The WBX does not have adjustable filtering.
Matt
On Wed, Feb 13, 2013 at 10:42 PM, Ralph A. Schmid, dk5ras
ra...@schmid.xxxwrote:
Hi,
I use an USRP1 together with gnuradio/GRC
...@ettus.com]
Sent: Thursday, February 14, 2013 7:51 AM
To: Ralph A. Schmid, dk5ras
Cc: GNURadio
Subject: Re: [Discuss-gnuradio] OFDM - real RF output vs. expected output
You are probably using an odd interpolation ratio. You need to use an even
rate in order to get a flat passband
Hi everyone, I have a question about ofdm benchmark. If I use
benchmark_tx.py and benchmark_rx.py without any change I have an error
rate below 10%.
However, if I only modify the benchmark_tx.py and I add only a
sleep(1) between packets transmissions like is shown in the following
code:
while n
Hi,
I have two USRP kit. I have tested them on different modulation techniques,
but I have a problem with OFDM block. It doesn't work with USRP kits,
Although it works fine on the simulation
Thanks,
___
Discuss-gnuradio mailing list
On Mon, Jan 7, 2013 at 11:17 AM, sivakumar reddy bsivakumar...@gmail.comwrote:
hi friends, good evening
I am trying to implement OFDM using USRPN210, then i got following
warnings and iam not getting anything on output FFT SINK. Please help me
current recv frame size: 1472 bytes
Current
1)removed still no output...:-(
2)thread[thread-per-block[0]: gr_block gr uhd usrp source (12)]: caught
unrecognized exception
i think this is not an error as it appears when i close the window
3) i have connected scope with random source to see transmitted integers
still no output at
On 10/19/2012 05:09 AM, Bilal wrote:
1)removed still no output...:-(
2)thread[thread-per-block[0]: gr_block gr uhd usrp source (12)]: caught
unrecognized exception
i think this is not an error as it appears when i close the window
That might be ok. I think its a boost issue on
Hi
I m using USRP2 and USRPN210 DB RFX900.
Block diagram
MOD:random source--ofdm--usrp sink
DeMOD:usrp source--ofdm demod--sink scope,fft
Problem is that:
Modulation is going fine,even at the receiver end the spectrum is just like
it should be (block for OFDM )
but there is nothing at the output
On 10/18/2012 04:47 AM, Bilal wrote:
Hi
I m using USRP2 and USRPN210 DB RFX900.
Block diagram
MOD:random source--ofdm--usrp sink
DeMOD:usrp source--ofdm demod--sink scope,fft
Problem is that:
Modulation is going fine,even at the receiver end the spectrum is just like
it should be
Rodriguez Abdalaabd...@cicese.edu.mx
Cc: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] ofdm block
On Mon, Sep 10, 2012 at 1:12 PM, Viktor Ivan Rodriguez Abdala
abd...@cicese.edu.mx wrote:
Hi
In the python folder, the CMakeLists.txt has
GR_PYTHON_INSTALL(
FILES
: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] ofdm block
On Mon, Sep 10, 2012 at 1:12 PM, Viktor Ivan Rodriguez Abdala
abd...@cicese.edu.mx wrote:
Hi
In the python folder, the CMakeLists.txt has
GR_PYTHON_INSTALL(
FILES
__init__.py dftsofdm.py DESTINATION
On Mon, Sep 10, 2012 at 1:12 PM, Viktor Ivan Rodriguez Abdala
abd...@cicese.edu.mx wrote:
Hi
In the python folder, the CMakeLists.txt has
GR_PYTHON_INSTALL(
FILES
__init__.py dftsofdm.py DESTINATION ${GR_PYTHON_DIR}/Umbrella
)
In the grc folder
install(FILES
Hi
In the python folder, the CMakeLists.txt has
GR_PYTHON_INSTALL(
FILES
__init__.py dftsofdm.py DESTINATION ${GR_PYTHON_DIR}/Umbrella
)
In the grc folder
install(FILES
Umbrella_bin2dec_ff.xml
Umbrella_dec2bin_ff.xml
Umbrella_encodconv_vff.xml
On Thu, Sep 6, 2012 at 3:59 PM, Viktor Ivan Rodriguez Abdala
abd...@cicese.edu.mx wrote:
Hi all,
I'm looking to develop a block called dfts ofdm, based in a similar block
called ofdm mod, I change the .xml and .py to a new name called DFTSOFDM,
but I can't make it work. In GRC I have the
Hi all,
I'm looking to develop a block called dfts ofdm, based in a similar
block called ofdm mod, I change the .xml and .py to a new name called
DFTSOFDM, but I can't make it work. In GRC I have the following error:
Traceback (most recent call last):
File
On Fri, Aug 3, 2012 at 10:36 AM, Vanessa Gardellin
vanessa.gardel...@iit.cnr.it wrote:
Dear all,
we are trying to use the block digital_mpsk_snr_est in an OFDM flowgraph.
We think that the right place for the snr_est is after the ofdm_frame_sink
however we have the following error:
itemsize
Dear all,
we are trying to use the block digital_mpsk_snr_est in an OFDM flowgraph.
We think that the right place for the snr_est is after the ofdm_frame_sink
however we have the following error:
itemsize mismatch: ofdm_frame_sink(27):0 using 1600, mpsk_snr_est_cc(28):0
using 8
(consider that
On Mon, Jul 30, 2012 at 1:11 PM, Ebtisam Ahmed ebtisamahme...@gmail.com wrote:
Hi everybody,
Im using gnuradio 3.2.2 and usrp rfx2400. when i use benchmark_tx/rx
example i always get timeout error...
i cant figure this out. This is the command i run with the output at a
receiver...
Hi everybody,
Im using gnuradio 3.2.2 and usrp rfx2400. when i use benchmark_tx/rx
example i always get timeout error...
i cant figure this out. This is the command i run with the output at a
receiver...
root@mimo:/home/mimo/ofdm# python benchmark_ofdm_rx.py -f 2452M --log
gr_fir_ccf: using
Hi all , i have some questions :
In OFDM Modulator Block , in Mapper Sub-block , in path of :
./lib/digital_ofdm_mapper_bcv.
cc
1- I saw the following comment inside the code : Eventually, we will
get rid of the occupied_carriers concept. , the question how you get rid
of the occupied
On Sat, Apr 7, 2012 at 6:19 PM, Alex Zhang cingular.a...@gmail.com wrote:
Hi Tom,
Just correct my mail.
I retest the case, it is found that my matlab code has some errors which
cause this confusion. Sorry for the incorrect result.
Alex,
Thanks for getting back in touch about this. I wasn't
Hi Tom,
Just correct my mail.
I retest the case, it is found that my matlab code has some errors which
cause this confusion. Sorry for the incorrect result.
On Tue, Apr 3, 2012 at 12:43 AM, Alex Zhang cingular.a...@gmail.com wrote:
Hi Tom,
To dig the details of the current ofdm receiver
On Tue, Mar 27, 2012 at 10:29 PM, Alex Zhang cingular.a...@gmail.com wrote:
Hi Tom,
Thanks for the reply.
In the ofdm_sync_pn.py, I see that a matched filter is used, after the
timing metric is obtained based on the correlation of the two halves of the
preamble. I understand this matched
Resend this mail for some comments. Thanks.
On Tue, Mar 27, 2012 at 9:29 PM, Alex Zhang cingular.a...@gmail.com wrote:
Hi Tom,
Thanks for the reply.
In the ofdm_sync_pn.py, I see that a matched filter is used, after the
timing metric is obtained based on the correlation of the two halves of
Hi Tom,
Thanks for the reply.
In the ofdm_sync_pn.py, I see that a matched filter is used, after the
timing metric is obtained based on the correlation of the two halves of the
preamble. I understand this matched filter is trying to find the end of the
plateau of the metric and get the smooth
On Sat, Mar 24, 2012 at 8:52 PM, Alex Zhang cingular.a...@gmail.com wrote:
Hi Gurus,
I just want to make sure how the current gnuradio ofdm exampel is
doing synchronization.
According to T. M. Schmidl and D. C. Cox, Robust Frequency and
Timing Synchonization for OFDM, IEEE Trans.
Hi Florian - Interesting observation about better reception when using larger
bandwidths. I tried it out, and yes indeed they do seem better at 1 MS/s
compared with 250 or 500 kS/s -- meaning that more packets are received
correctly at the higher rate than the lower rates. I didn't try 1
On Tue, Feb 21, 2012 at 9:14 AM, Michael Dickens m...@alum.mit.edu wrote:
Hi Florian - Interesting observation about better reception when using
larger bandwidths. I tried it out, and yes indeed they do seem better at 1
MS/s compared with 250 or 500 kS/s -- meaning that more packets are
On Feb 21, 2012, at 9:44 AM, Tom Rondeau wrote:
It's because with the larger bandwidth, the subcarriers, too, have a larger
bandwidth. The coarse frequency correction is only set to look at so large an
offset based on a number of subcarriers (+/-5 or 10), so now with the same
frequency
On Tue, Feb 21, 2012 at 10:00 AM, Michael Dickens m...@alum.mit.edu wrote:
On Feb 21, 2012, at 9:44 AM, Tom Rondeau wrote:
It's because with the larger bandwidth, the subcarriers, too, have a
larger bandwidth. The coarse frequency correction is only set to look at so
large an offset based on
On Feb 21, 2012, at 10:05 AM, Tom Rondeau wrote:
Are you seeing the 1 MHz offset when you use the uhd_siggen.py? Or is it just
with the OFDM transmitter?
I do see it with uhd_siggen.py. Didn't know about that utility; cool! - MLD
___
Are you seeing the 1 MHz offset when you use the uhd_siggen.py? Or is it
just with the OFDM transmitter?
What is this tool doing? Transmitting a sine and checking the offset.
Sorry, for the moment I have no possibilitie to check that.
It's because with the larger bandwidth, the subcarriers,
There is a coarse and a fine frequency offset correction. The fine
correct makes sure that the subcarrier is centered in the bin; the
coarse adjusts for an integer number of subcarriers off from the center
frequency. By default, the OFDM receiver will correct for some number of
subcarrier bins
Although using the same device to check on said carrier as is
transmitting it leads to compounding error in one direction or t'other.
Best to use another device (preferrably a lab spectrum analyser) to
check the offset.
-Marcus
On Tue, 21 Feb 2012 12:56:30 -0500, Tom
Rondeau wrote:
On
On Tue, Feb 21, 2012 at 1:06 PM, Florian Schlembach
florian.schlemb...@tu-ilmenau.de wrote:
There is a coarse and a fine frequency offset correction. The fine
correct makes sure that the subcarrier is centered in the bin; the
coarse adjusts for an integer number of subcarriers off from the
I highly suspect it's user error :) but I'm truly at a loss right now as to the
error.
Michael,
we encountered a very similar issue and spent already a lot of time on
that. Configuration is the same except we are using an USRP2 though.
We also did not receive anything at the RX side
I've been playing with the gr-digital OFDM benchmark, Tx - Rx, and have an odd
issue that seems to be coming from within GNU Radio itself, not UHD. My setup
is: Mac OS X 10.6.8, latest UHD and GNU Radio from their respective GIT
masters, XCode 3.2.3 (gcc 4.2.1). I'm using 2 USRP1's, each
On 11/13/2011 04:59 PM, Nowlan, Sean wrote:
It could be related to the limitations of the ARM processor on the
E100. I haven't tried the OFDM examples. The workarounds at this
point seem to be: help implement some of the ARM NEON optimizations
in Volk to squeeze out more performance or
On 11/13/2011 11:00 PM, Josh Blum wrote:
It looks like the ofdm blocks are using a fair amount of multiply and
multiply const blocks:
gr-digital$ find -name *ofdm* | xargs grep mult
./python/ofdm_sync_ml.py:self.mixer = gr.multiply_cc();
./python/ofdm_sync_ml.py:# The output
hi Marcus,
I am attaching the screen shots and also block diagram of transmitter..
right now i am just trying to look for transmission of OFDM signal via
usrp1. As i mentioned earlier in the fft scope plot in gnu radio i see the
typical ofdm signal but on the other hand in usrp sink on the
hi Marcus,
I am attaching the screen shots and also block diagram of transmitter..
right now i am just trying to look for transmission of OFDM signal via
usrp1. As i mentioned earlier in the fft scope plot in gnu radio i see the
typical ofdm signal but on the other hand in usrp sink on the
On Oct 18, 2011, at 11:18 AM, Marcus D. Leech mle...@ripnet.com wrote:
hi Marcus,
I am attaching the screen shots and also block diagram of transmitter..
right now i am just trying to look for transmission of OFDM signal via
usrp1. As i mentioned earlier in the fft scope plot in gnu radio
Hello Marcus thanks for your reply.. Well the problem is there is not much
documentation available on internet on usurp .. Also I am quite new to gnu
radio and usrp1 ... I tried to play with interpolation and decimation
settings but didnot get the desired ofdm signal .. I am not sure what else I
Hello Marcus thanks for your reply.. Well the problem is there is not much
documentation available on internet on usurp .. Also I am quite new to gnu
radio and usrp1 ... I tried to play with interpolation and decimation
settings but didnot get the desired ofdm signal .. I am not sure what else I
Hello Marcus thanks for your reply.. Well the problem is there is not much
documentation available on internet on usurp .. Also I am quite new to gnu
radio and usrp1 ... I tried to play with interpolation and decimation
settings but didnot get the desired ofdm signal .. I am not sure what else I
I am trying to run the open source ofdm code , with USRP 2 as receiver and
USRP N210 as transmitter at the center frequency 2.49G with RF board XCVR
2450 , transmitter is sending the data , but when I run usrp2_fft.py on
receiver i get http://old.nabble.com/file/p32662141/Screenshot-4.png
but
Hello all,
I am trying to transmitt and recieve OFDM signal Via USRP1 board. I made
basic simulation in GNU radio a signal source block and then interleave and
then OFDM modulator and then channel model block then usrp1 sink and fft
sink to see the output..In FFT sink at the end it shows proper
On 10/16/2011 12:29 PM, waqasme wrote:
Hello all,
I am trying to transmitt and recieve OFDM signal Via USRP1 board. I made
basic simulation in GNU radio a signal source block and then interleave and
then OFDM modulator and then channel model block then usrp1 sink and fft
sink to see the
Hi Marcus,
As i mentioned the flow graph signal blocks i have used in gnu radio
companion from that i am getting this out put on FFT sink in GNU radio
companion simulation flowgraph which is similar like this
and i have used RF cable to connect from USRP1 TX board to the spectrum
analyser
On 10/16/2011 05:55 PM, waqasme wrote:
Hi Marcus,
As i mentioned the flow graph signal blocks i have used in gnu radio
companion from that i am getting this out put on FFT sink in GNU radio
companion simulation flowgraph which is similar like this
If you're trying to embed images, it's not
Hi everyone,
I am trying to test signal tranmit by using OFDM modulator via USRP1 and i
am getting this error message . Does anyone know what does it mean?or how to
fix this problem. i connected one usrp1 with usb cable to my laptop just to
check the transmission. it shows the signal in FFT
Hi everyone,
I am trying to test signal tranmit by using OFDM modulator via USRP1 and i
am getting this error message . Does anyone know what does it mean?or how to
fix this problem. i connected one usrp1 with usb cable to my laptop just to
check the transmission. it shows the signal in FFT
Hey Marcus this was very very informative.This offset was really killing me
every time when I was running the OFDM example.I think I need to order some
GPSDO :)
Marcus D. Leech wrote:
On 09/09/2011 07:26 PM, Tuan (Johnny) Ta wrote:
As far as I know there's no open source code for an OFDM
Hello sumit,
I am trying to make OFDM trasmitter and reciever block diagram( with signal
processing blocks available in GNU Radio) in GNU Radio companion. As my
supervisor asked me to make simulation first in GNU radio software then move
on to USRP. i have made this basic simulation model for
dont use random source packet encoder is already in the ofdm block in the
gnuradio-companion. so need not to include.also try to put the screen-shot
of ur block diagram.
waqasme wrote:
Hello sumit,
I am trying to make OFDM trasmitter and reciever block diagram( with
signal processing
Hi,
sorry my internet was down for almost 12 hrs... so whts the situation
now.are you able to transmit and receive
waqasme wrote:
Hi Sumit,
Thanks you so much for ur detailed explanation . i really appriciate your
help.
I am following the same steps as you mentioned earlier but iam
hello, well i followed the same steps and now i can see the different options
by typing that command benchmark_ofdm_py. -h .. now am done up till that
now i asked my supervisor to provide me the extra USRP so hopefully i will
get it soon from him. till that time i am just try to understand how
go to the directory /usr/local/bin
there u will find benchmark files for ofdm (both transmission and reception)
u need to type benchmark_ofdm_rx.py -h
and benchmark_ofdm_tx.py -h
these will show you the parameters u can play with.
after that u can run these files by typing
Hi Sumit,
Thanks you so much for ur detailed explanation . i really appriciate your
help.
I am following the same steps as you mentioned earlier but iam getiing this
message when i am entering these comands in terminal. here is the messages .
hp@ubuntu:~$ /usr/local/bin
bash: /usr/local/bin: is
You seem to be quite new to Linux, what do you intend to do for your Master
thesis? Gnuradio is not something you can master in a couple of months.
To go to a directory, you need to use the 'cd' command. Ie
cd /usr/local/bin
My benchmark_ofdm code is not in /usr/local/bin so when you get to that
Thanks johnny for your response yes i am quite new to GNU Radio so just
started to learn about this software.
Ok i will play with it and let you know the results.
Thanks for your help guys..
Waq..
Tuan Ta-2 wrote:
You seem to be quite new to Linux, what do you intend to do for your
Master
201 - 300 of 554 matches
Mail list logo
