Re: [Discuss-gnuradio] gr-ieee802_11 receiver

[serefay]

Hi, 

thanks for quick reply. What I am trying to do is to regenerate noise-free
wifi frames, which I already captured with HackRf. So I m receiving wifi
samples with hack RF then and save both the samples and decoded  frames in
files. I use the decoded pcap file to regenerate the wifi frames. I send
each frame to the transmitter ( i changed the mac block accordingly) and
regenrate the same packets. The aim is to receive them without noise so that
i can compare with the samples with with the noise, which i received with
hackrf. I will then use that for my statistic. I want to measure the Error
Vector Magnitude and see the deviation of wifi samples when i receive them.
I don not know if I made my point clear but thanks for your help. 

So I saved the samples in a file but I tried to connect the transmitter and
receiver in WIFI HIer  block. it still miss some packets.  How can i
understand if my disk has bottleneck and can it be solved?

Thanks a lot 
Best regards



--
View this message in context: 
http://gnuradio.4.n7.nabble.com/gr-ieee802-11-receiver-tp63486p63491.html
Sent from the GnuRadio mailing list archive at Nabble.com.

___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

Re: [Discuss-gnuradio] gr-ieee802_11 receiver

[Bastian Bloessl]

Hi,

On 04/09/2017 03:49 PM, serefay wrote:
> Hi, 
> 
> Thanks for your reply. I could not find out how can I solve it. But this
> problem comes only when I receive from a file source. Even tough  when send
> the IQ samples that I captured with Hackrf, which i saved in a file, it
> encounters the same problem.Is there any some blocks can be alternative to
> file source to send the samples to the receiver?


Sorry, but I still don't understand what you are trying to do. It would
be great it you could describe it a bit more detailed.

Anyhow, gr-ieee802-11 also has a transmitter. So why not just generate
frames, as opposed to replaying a noisy capture. If you are trying to
transmit a captured sample file from disk, the disk might be the bottle
neck. (A 20MHz signal is 160Mbyte/s).

Best,
Bastian

___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

Re: [Discuss-gnuradio] gr-ieee802_11 receiver

[serefay]

Hi, 

Thanks for your reply. I could not find out how can I solve it. But this
problem comes only when I receive from a file source. Even tough  when send
the IQ samples that I captured with Hackrf, which i saved in a file, it
encounters the same problem.Is there any some blocks can be alternative to
file source to send the samples to the receiver?

thanks




--
View this message in context: 
http://gnuradio.4.n7.nabble.com/gr-ieee802-11-receiver-tp63486p63489.html
Sent from the GnuRadio mailing list archive at Nabble.com.

___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

Re: [Discuss-gnuradio] gr-ieee802_11 receiver

[Bastian Bloessl]

Hi,

On 04/08/2017 02:32 PM, serefay wrote:
> Hello everyone,
> 
> I am using gr-ieee802_11 to regenerate wifi packets. I receive packets with
> HackRf and regenerate the same packet with transmitter and now I want to
> look whether they look the similar but  some packets are not received. I
> enabled MAC decode debug and it gives this error when it misses the packet.

I don't get that part...

> "
> Decode MAC: input 53
> Warning: starting to receive new frame before old frame was complete
> Already copied 27 out of 30 symbols of last frame
> "
> can anyone please help me  and give me some  idea what could result this
> error.? I would be grateful for any help.
> Thanks

This might happen if a frame is detected while another frame is already
received, i.e. the second frame interferes with the current frame. See
the hidden terminal problem for why this might happen.

(Another explanation might be that the receiver was initially sync on
noise and now switches to the real frame.)

Best,
Bastian



___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

Re: [Discuss-gnuradio] gr-ieee802_11 receiver

[serefay]

Hi ,

I am sorry I have send on nabble and did not know that willl add only as
thumbnails. I can send grc flow graph but i have changed the original codes
so without those cpp files will it work. I dont know but I can send the
whole project. I can also send whole files if have time to check it. I
would be grateful for your help

Thanks

Best Regards

2017-04-01 23:49 GMT+02:00 Cinaed Simson [via GnuRadio] <
ml-node+s4n63412...@n7.nabble.com>:

> On 04/01/2017 08:41 AM, serefay wrote:
>
> > Hi Marcus,
> >
> > thank your very much for your reply . In Pictures attached there are my
> > receiver and transmitter. So with HackRf I have received some wifi
> packets.
> > And in my transmitter I read the Pcap file which contains those wifi
> packets
> > that I received and sending them all to the transmitter to create them
> > without noise. And at the end I multiply it by 500ms for gain and saved
> the
> > regenerated packets into a file . Now In those pictures you see I use a
> file
> > source as receiver source. I read those packets that I recreated and
> want to
> > compare with the old original pcap. But some of the packets or not read
> It
> > does not happens always to the same packets so I think it is not that
> the
> > packets are not successfully created but why It can be? I don't
> understand
> > that. Am I missing something? or what can I do more. I appreciate your
> help.
> >
> > Thank your very much
> >
> > Kind Regards
> > Seref
> >
> > 
> > 
>
> Have you looked at those images online?
>
> If you need help, try sending the XML based flowgraph instead of a
> binary image.
>
>
> >
> >
> > --
> > View this message in context: http://gnuradio.4.n7.nabble.
> com/gr-ieee802-11-receiver-tp63405p63409.html
> > Sent from the GnuRadio mailing list archive at Nabble.com.
> >
> > ___
> > Discuss-gnuradio mailing list
> > [hidden email] 
> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> >
>
>
> ___
> Discuss-gnuradio mailing list
> [hidden email] 
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>
> --
> If you reply to this email, your message will be added to the discussion
> below:
> http://gnuradio.4.n7.nabble.com/gr-ieee802-11-receiver-tp63405p63412.html
> To unsubscribe from gr-ieee802_11 receiver, click here
> 
> .
> NAML
> 
>


gr-ieee802-11-next.zip (3M) 





--
View this message in context: 
http://gnuradio.4.n7.nabble.com/gr-ieee802-11-receiver-tp63405p63413.html
Sent from the GnuRadio mailing list archive at Nabble.com.___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

Re: [Discuss-gnuradio] gr-ieee802_11 receiver

[Cinaed Simson]

On 04/01/2017 08:41 AM, serefay wrote:
> Hi Marcus,
> 
> thank your very much for your reply . In Pictures attached there are my
> receiver and transmitter. So with HackRf I have received some wifi packets.
> And in my transmitter I read the Pcap file which contains those wifi packets
> that I received and sending them all to the transmitter to create them
> without noise. And at the end I multiply it by 500ms for gain and saved the
> regenerated packets into a file . Now In those pictures you see I use a file
> source as receiver source. I read those packets that I recreated and want to
> compare with the old original pcap. But some of the packets or not read It
> does not happens always to the same packets so I think it is not that the
> packets are not successfully created but why It can be? I don't understand
> that. Am I missing something? or what can I do more. I appreciate your help. 
> 
> Thank your very much
> 
> Kind Regards
> Seref
> 
>  
>  

Have you looked at those images online?

If you need help, try sending the XML based flowgraph instead of a
binary image.


> 
> 
> --
> View this message in context: 
> http://gnuradio.4.n7.nabble.com/gr-ieee802-11-receiver-tp63405p63409.html
> Sent from the GnuRadio mailing list archive at Nabble.com.
> 
> ___
> Discuss-gnuradio mailing list
> Discuss-gnuradio@gnu.org
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> 


___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

Re: [Discuss-gnuradio] gr-ieee802_11 receiver

[serefay]

Hi Marcus,

thank your very much for your reply . In Pictures attached there are my
receiver and transmitter. So with HackRf I have received some wifi packets.
And in my transmitter I read the Pcap file which contains those wifi packets
that I received and sending them all to the transmitter to create them
without noise. And at the end I multiply it by 500ms for gain and saved the
regenerated packets into a file . Now In those pictures you see I use a file
source as receiver source. I read those packets that I recreated and want to
compare with the old original pcap. But some of the packets or not read It
does not happens always to the same packets so I think it is not that the
packets are not successfully created but why It can be? I don't understand
that. Am I missing something? or what can I do more. I appreciate your help. 

Thank your very much

Kind Regards
Seref

 
 



--
View this message in context: 
http://gnuradio.4.n7.nabble.com/gr-ieee802-11-receiver-tp63405p63409.html
Sent from the GnuRadio mailing list archive at Nabble.com.

___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

Re: [Discuss-gnuradio] gr-ieee802_11 receiver

[Marcus Müller]

Hi Seref,

Sorry,


On 01.04.2017 12:59, serefay wrote:
>  receive samples and retransmit the same IQ samples wit Tx and save
> them in file, but when I try to use that IQ samples from file to receive
> them from file source 
I'm not quite sure I get the full idea of what exactly you're doing.

Could you please make something like a drawing that explains what signal
you store?

Best regards,
Marcus

___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio