Hi,
I am new to GNU Radio and I want to use OFDM to send signals at frequency
of around 2.4 GHz using USRP N210 with daughter board RFX2400. I do not
really understand the difference between benchmark_tx.py and tx_ofdm.py. I
know that benchmark runs with the USRP as well because it has an option t
> >>
> >> ** Steering Committee
> >>
> >> The track committee consists of:
> >> * Phil "catvideos" Balister (OpenEmbedded / OpenSDR)
> >> * Martin "mbr0wn" Braun (GNU Radio)
> >> * Sylvain "tnt" Munaut (OsmoCo
Hi Martin,
Thanks for your response. Are benchmark_tx and benchmark_rx both deprecated
? And is there any example flowgraph which uses the ofdm_transmitter which
I can use to send the data. I have a CS background and I do not know much
about the signal processing at PHY layer in great detail.
Bes
Hello,
I have Ubuntu 16.04 and GNU radio version 3.7.10.1. I have two USRPs N210
with CBX daughterboard (1.2-6 GHz). My USRP is connected through the
Ethernet cable directly to the computer
I am trying to send OFDM modulated data through the TX/RX antenna and I run
uhd_fft to see the spectrum of
Hello,
I am using two USRPs N210 with CBX daughterboards connected to different
machines and I have GNU Radio version 3.7 and uhd version 3.11.
I installed the IEEE 802.11 a/g/p module for GNU Radio. I ran the wifi_rx
and wifi_tx on different machines and the data I send gets printed on the
conso
Hi Marcus,
I have set the IP address of one USRPN210 to 192.168.10.3 replacing its
default 192.168.10.2 IP but the I can not ping this USRP from a different
computer which has the other USRP conneced to it. I can ping it from the
same computer to which it is connected. Why is that? And how do you
nnected--do your USRPs have dedicated ethernet connections per computer,
> or are they connected to the same ports that your computers use to talk to
> the rest of your network?
>
>
>
>
>
>
> On 2017-01-18 14:05, Qurat-Ul-Ann Akbar wrote:
>
> Hi Marcus,
>
f them as network connections but a bus connection between your
> computer and the N210. In which case, they could each have retained their
> original factory address.
>
>
>
>
>
>
> On 2017-01-18 14:13, Qurat-Ul-Ann Akbar wrote:
>
> Each USRP is connected with a diffe
data. Is it
related to the fact that I wasnt able to ping the USRP with IP address
192.168.10.3 from the other computer? But I should be able to change the IP
and still receive data.
On Wed, Jan 18, 2017 at 1:34 PM, Qurat-Ul-Ann Akbar <
quratulannakbar2...@u.northwestern.edu> wrote:
&
01/17/2017 11:57 PM, Qurat-Ul-Ann Akbar wrote:
>
>> 1) The sequence numbers are not in accordance with the data. Sometimes
>> the first packet I get has sequence number 0 but at other times I get
>> sequence numbers like 5 or 41. The mac frame length is 524. An example
>> se
ink could be going on ?
Best,
Annie
On Tue, Jan 24, 2017 at 1:25 AM, Bastian Bloessl
wrote:
> Hi,
>
> On 01/24/2017 12:17 AM, Qurat-Ul-Ann Akbar wrote:
>
>> I did the following things that you suggested:
>>
>> 1) The gain is normalized and in the example file wif
Hi,
I have been working with the ieee 802.11 module for GNU Radio. I have GNU
Radio v 3.7.10.1 and I am using USRP N210 with a cbx daughterboard.
Right now I am just testing if the wifi_rx(the receiver) works. I am using
a wifi card to send beacon frames and trying to detect the frames through
th
Hi Bastian,
I was testing the wifi_tx as well and I followed your tutorial where you
asked to turn the wifi card into a monitor and then run the transmitter
through the SDR. I also connected the Wireshark connector block to the WiFi
PHY Hier block to see the packets being sent by the wifi_tx. Afte
Hi,
I am trying to run the transceiver which has a tuntap pdu block for sending
messages through TCP. There is a bash file nic.sh which gives an example
configuration for the tuntap interface.
I am not very familiar with working with tuntap and trying to understand
it. Can anyone kindly tell me i
Hi,
I recently installed gnuradio on one of my machines using pyBOMBS and this
is my first time trying pyBOMBS for installation. Whenever I generate a
python file from the GRC flow graph and try to run the python file, I
receive the error "No module named gnuradio".
I think the python is not able
Thank you for explaining the interaction between the Tun/Tap interface and
the USRP. When I run the wifi_transceiver I get a lot of "Ds" on the
console which indicates overflow. But I am able to receive packets through
the wifi_rx without any overflow. Can you tell me why I am experiencing
just ove
Hi,
I want to alternate the gain of the USRP between two values after a certain
period of time. For example after 100 ms it should go from A to B and after
another 100 ms the value should go from B to A and so on.
Is there an easy way of doing this in the GNU Radio companion or would I
need to st
future to account for the startup time of the
> flowgraph.
>
> Regards,
> Derek
>
> On Thu, Feb 23, 2017 at 1:36 PM, Qurat-Ul-Ann Akbar <
> quratulannakbar2...@u.northwestern.edu> wrote:
>
>> Hi,
>>
>> I want to alternate the gain of the USRP between
Also I want to keep doing this in a loop (the values keep alternating after
an interval). Will it be possible through the command port interface ?
On Fri, Feb 24, 2017 at 9:17 AM, Qurat-Ul-Ann Akbar <
quratulannakbar2...@u.northwestern.edu> wrote:
> Hi Derek,
>
> Thank you for
have it alternate the gain.
>
> Regards,
> Derek
>
> On Fri, Feb 24, 2017 at 8:52 AM, Qurat-Ul-Ann Akbar <
> quratulannakbar2...@u.northwestern.edu> wrote:
>
>> Also I want to keep doing this in a loop (the values keep alternating
>> after an interval). Will it be p
Hi,
I have been working with the 802.11 module for GNU Radio and I want to
enable my receiver to perform some bit error rate calculations. I ran the
wifi_loopbck and noticed that a bit error rate field appears in the GUI. I
have been trying to see where and how is this error being calculated. Can
Hi,
I want to calculate the number of frames correctly decoded by the wifi_rx
in the IEEE 802.11 module. I can not find the source file for the block
WiFi_Decode Mac where I can place a counter for the successfully decoded
frames. Can anyone tell me where this file is ? And is there any other way
Hi,
If I want to make changes in the PHY hierarchical block, can I just make
changes in the grc file and then recompile ? Becauase
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Hi,
If I want to make changes in the PHY hierarchical block, can I just make
changes in the grc file available in the examples folder and then recompile
? Because I cant file a .cc file in the lib folder in IEEE_802.11 module
and the source code for most blocks is in there.
Thank you.
___
values. Can you kindly explain that ?
On Mon, Mar 20, 2017 at 12:09 PM, Bastian Bloessl wrote:
> Hi,
>
>
> > On 20 Mar 2017, at 17:50, Qurat-Ul-Ann Akbar northwestern.edu> wrote:
> >
> > If I want to make changes in the PHY hierarchical block, can I just make
>
0/2017 09:17 PM, Qurat-Ul-Ann Akbar wrote:
> > Hi,
> >
> > Thank you. I got it! I have another question. In the OFDM Carrier
> > Allocator block, there are 127 values for pilot symbols each of them
> > either (1,1,1,-1) or (-1,-1,-1,1). The pilot frequencies are
>
how can I do that dynamically without hard coding these values ?
Something like this (1,1,1,-1) -> (1,1,1.2,-1) and so on...
On Fri, Mar 24, 2017 at 2:57 PM, Bastian Bloessl wrote:
> Hi,
>
> On 03/24/2017 08:44 PM, Qurat-Ul-Ann Akbar wrote:
> > How is a particular polarity pi
current equalizer block?
On Sat, Mar 25, 2017 at 8:55 AM, Bastian Bloessl wrote:
> Hi,
>
> Am 25.03.2017 um 16:12 schrieb Qurat-Ul-Ann Akbar:
>
>> Thanks for pointing me to the file. This list of pilot tones with
>> different polarities seems to be hard coded. Is there
Hi,
Are pilot tones used at all for equalization in wifi_rx ? I do not see that
being done in the WiFi frame equalizer block. Also even when I change the
amplitude and phase of the pilots in Wifi_tx other than the default 1, the
WiFi packets were still being decoded correctly. Is it because that t
Hello,
Is ASK modulation implemented in gnuradio? I know that BPSK, QPSK and QAM
are.
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Hi,
I am trying to add a command port to the OFDM Allocator block in GNURadio.
The goal is for this command port to take a message every 1 ms to change
the amplitude of the complex pilot symbols. However, I can not see the port
appearing in GRC.
I just wrote some test code to see if the port is a
t-Type: text/plain; charset=windows-1252
>
> Hi,
>
> as Derek said, can you please take this to the USRP-users mailing list?
> GNU Radio and UHD are different things...
>
> Best regards and thank you
>
> Marcus
>
>
> On 04.04.2017 23:50, bup487 wrote:
> > Okay,
Hi,
I want to look at the number of symbols copied for *each frame
received *in wifi_rx
flow graph. I have been trying to understand how the start of each frame is
calculated and by looking at the code it seems like its being done in the
wifi sync_short block where the auto correlation coefficient
Hi,
I am working with USRPs N210 and GNU Radio version 3.7. I wasn't able to
work with higher sampling rate like 20 MHZ used in WiFi and that's why I
bought a new workstation with better processor. However, the module still
isn't working. The receiver isn't receiving anything at 20 MHZ if it's QAM
r.
>
> Finally, if you work with Matlab/Simulink, you can have the same problem.
> In this case I recommend you to change to GNU-Radio and its flowchart
> interface, GRC.
>
>
>
>
>
>
>
> *De:* Discuss-gnuradio [mailto:discuss-gnuradio-bounces+vdiez=
> ikerlan...
fecting the transmission.
>
> Thank you .
>
> On May 25, 2017 1:27 PM, "sakthivel velumani" wrote:
>
>> What is the update rate of DAC in transmitter side? Try increasing it.
>>
>> On Thu, May 25, 2017 at 5:43 PM, Qurat-Ul-Ann Akbar <
>> quratul
Hello,
How is the timing offset being handled in the 802.11 module. I see that the
sync_long block does frequency offset correction and the frame_equalizer
block does the phase correction but I dont understand where is the timing
offset being handled. Can anyone tell me which algorithm is being us
.
On Sun, Jun 4, 2017 at 12:33 PM, Bastian Bloessl wrote:
> Hi,
>
> On 6/3/2017 9:11 PM, Qurat-Ul-Ann Akbar wrote:
>
>> Hello,
>>
>> How is the timing offset being handled in the 802.11 module. I see that
>> the sync_long block does frequency offset correction a
I understand. But you didnt connect them directly to the USRP. You used
some cable to connect the two and had a stand for your antenna. Can you
tell me which cable was that ?
On Jun 4, 2017 11:13 AM, "Bastian Bloessl" wrote:
> Hi,
>
>
> On 06/04/2017 04:25 PM, Qu
think those
were Vert 2450.
On Jun 4, 2017 11:21 AM, "Bastian Bloessl" wrote:
>
>
> On 06/04/2017 05:16 PM, Qurat-Ul-Ann Akbar wrote:
>
>> I understand. But you didnt connect them directly to the USRP. You used
>> some cable to connect the two and had a stand for
each other's LOS and I dont think interference should be a problem. And if
you have used Vert2450 antennas then I really dont understand whats the
problem.
On Sun, Jun 4, 2017 at 11:47 AM, Bastian Bloessl wrote:
>
> On 06/04/2017 05:35 PM, Qurat-Ul-Ann Akbar wrote:
>
>> Then
Hi,
I previously posted about the possibility of connecting USRPs with a
loopback cable kit. I have connected the two USRPs with the loopback cable
kit to eliminate the wireless channel and low SNR problem but I am still
not receiving packets at higher sampling rates, anything above 5 MHz. It
work
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