Ok. All working fine :D
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On 10/09/2014 10:40 AM, Ernest Szczepaniak wrote:
Greetings,
finnaly got it working :D Problem was with descrambler. Now it gives results
as follows:
Service: 'ok'
Duration: ''
Source_MAC_Adress: '232323232323'
Destinatio
Greetings,
finnaly got it working :D Problem was with descrambler. Now it gives results
as follows:
Service: 'ok'
Duration: ''
Source_MAC_Adress: '232323232323'
Destination_MAC_Adress: ''
Protocol_ver
Ok fixed. Now giving correct results :) Ill try with your frame once more and
hit you up later.
Thanks for your amazing feedback Bastian.
Best,
Ernest
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On 08 Oct 2014, at 14:23, Ernest Szczepaniak wrote:
> So... After going deep into Annex L i found that my scrambler fails. Also
> MATLAB built-in scrambler gives wrong results. Could you pls check this code
> fragment?
>
> Asumme that we have 20 data bits to scramble. Initial scrambler state is
So... After going deep into Annex L i found that my scrambler fails. Also
MATLAB built-in scrambler gives wrong results. Could you pls check this code
fragment?
Asumme that we have 20 data bits to scramble. Initial scrambler state is [1
0 1 1 1 0 1] (bit nr 7 left side).
scrambler_register=[1 0 1
Got the pilot sequence but ill check it once more. I also got Annex L so not
neccesary to post it but thanks. Ill check everything once more, according
to L.
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On 10/08/2014 11:54 AM, Ernest Szczepaniak wrote:
Ok. After couple of days trying to decode your frame i decided to check my
receiver with real samples.
Could it be possible that after demodulation (de-interleaving,
de-convolutional, de-scrambling) im getting over 40x0's in correct positions
(9 r
On 10/08/2014 11:54 AM, Ernest Szczepaniak wrote:
Ok. After couple of days trying to decode your frame i decided to check my
receiver with real samples.
Could it be possible that after demodulation (de-interleaving,
de-convolutional, de-scrambling) im getting over 40x0's in correct positions
(9 r
Ok. After couple of days trying to decode your frame i decided to check my
receiver with real samples.
Could it be possible that after demodulation (de-interleaving,
de-convolutional, de-scrambling) im getting over 40x0's in correct positions
(9 reserved bits, 16x0s in duration, correct pads) and s
On 10/07/2014 04:57 PM, Ernest Szczepaniak wrote:
Nope,
Any way to get it? Is it downloadable?
Should be helpfull indeed.
As far as I know it is not downloadable. You would have to extract (copy
- paste) the data from the pdf.
Bastian
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Nope,
Any way to get it? Is it downloadable?
Should be helpfull indeed.
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Hi,
I can’t help you much without the code, but did you see the example frame in
Annex L of the standard?
Maybe it helps you to debug your scripts.
Bastian
On 06 Oct 2014, at 22:19, Ernest Szczepaniak wrote:
> Ok, so i decoded all of the payload (123 data symbols, de-interleaving every
> one
Ok, so i decoded all of the payload (123 data symbols, de-interleaving every
one in receiver's loop). After Viterbi and descrambling it gives some
strange results:
7 of SERVICE bits are random - OK (i read in standard that those 7 bits are
0's at the transmitter, and will set receivers descrambler
Hi,
On 06 Oct 2014, at 10:33, Ernest Szczepaniak wrote:
> Hi, much appreciate for your reply Bastian.
>
> I have succefully found your frame.bin signal, forwarded by my USRP
> (generated in MATLAB, received with Windows Network Monitor and wlan card).
>
> You were right. It is Data frame, 232
Hi, much appreciate for your reply Bastian.
I have succefully found your frame.bin signal, forwarded by my USRP
(generated in MATLAB, received with Windows Network Monitor and wlan card).
You were right. It is Data frame, 232323:232323 Source MAC and FF:FF
Destination MAC.
Still dunno
On 10/05/2014 01:37 PM, Ernest Szczepaniak wrote:
Greetings,
Ok, got this. After some test's i think that the problem is with my
descrambler (de-interleaver and Viterbi seems to be ok). Currently, im using
Matlab's one provided by comm. toolbox.
Is it correct to use 127-bit length pre-defined s
Greetings,
Ok, got this. After some test's i think that the problem is with my
descrambler (de-interleaver and Viterbi seems to be ok). Currently, im using
Matlab's one provided by comm. toolbox.
Is it correct to use 127-bit length pre-defined scrambling/descrambling seq?
(i found it in 802.11 s
Please, stay on the list.
On 04 Oct 2014, at 18:20, Ernest Szczepaniak wrote:
> Hi,
>
> we are talking about 'frame.bin' signal right?
yes
> Becouse my decoder says:
>
> Service: 'ok'
> Protocol_version: 'Supported'
> Type: 'Menagement'
> Subtype: 'Probe Request'
> To_DS: 'True'
> From_DS: '
Hi,
On 04 Oct 2014, at 15:50, Ernest Szczepaniak wrote:
> Hello,
>
> First of all, much love for your reply (it made my day).
>
> So i started with sent frame [2]. And my receiver gives some nice results:
>
> - found OFDM symbol
> - aquired time synchronization
> - Shmidl/Cox says that there
Hi,
you can use gr-ieee802-11 [1] to generate WiFi frames. Just start the TX flow
graph and pipe the output to a file.
I uploaded a frame (IQ data, no noise) [2] for you that you can use to get
started.
I don’t use Matlab, so i don’t know how to import the data, but you can display
the IQ samp
Greetings engi's!
I'm currently working on my masters (802.11 wlan receiver with
MATLAB/USRPN210). After creating all the important stuff ie:
-symbol finder
-time synchronization
-coarse and fine frequency compensation
-symbol demodulator
-deinterleaver
-Viterbi decoder
-descrambler etc.
-MAC la
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