Forum: GNU Radio Re: [Douglas Geiger BBN 802.11b] Porting code on USRP2 problems

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165991260d0639bb7ac84c99339b4ee9?d=identicon&s=25 Ben Yahmed (Guest)
on 2009-04-24 14:17
(Received via mailing list)
Good News!!!!
I finally succeeded to receive with an USRP2 packets sent with another
USRP2. I tryed to modify the parameters and found the magic combination:


./bbn_80211b_tx.py -f 2.4G -e eth1  -i 24 -r 20
 >>> gr_fir_ccf: using SSE

Network interface:  eth1
USRP2 address:  00:50:c2:85:30:cb
Using TX d'board id 0x0060
Tx baseband frequency:  2.4G
Tx DUC frequency:  0
Tx residual frequency:  0
Tx interpolation rate:  24
Samples per data bit:  8


DATA:

Hello world

Sending pkt  0
Sending pkt  1
Sending pkt  2
Sending pkt  3
Sending pkt  4
Sending pkt  5
Sending pkt  6
Sending pkt  7
Sending pkt  8
Sending pkt  9
Sending pkt  10
Sending pkt  11
Sending pkt  12
Sending pkt  13
Sending pkt  14
Sending pkt  15
Sending pkt  16
Sending pkt  17
Sending pkt  18
Sending pkt  19




########################################


  ./bbn_80211b_rx.py -f 2.4G -v
Bits Per Encoded Sample = 16
adc frequency =  100000000
decimation frequency =  24
input_rate =  4166666
gain =  46.0
desired freq =  2400000000.0
baseband frequency 2400000000.0
dxc frequency 0.0
Samples per data bit =  8
 >>> gr_fir_ccf: using SSE
callback
PKT: len=15, rssi=-96, src=UNKNOWN, time=1405840, rate=1 Mbps
callback
PKT: len=15, rssi=-96, src=UNKNOWN, time=1406760, rate=1 Mbps
callback
PKT: len=15, rssi=-96, src=UNKNOWN, time=1407128, rate=1 Mbps
callback
PKT: len=15, rssi=-96, src=UNKNOWN, time=1407496, rate=1 Mbps
callback
PKT: len=15, rssi=-96, src=UNKNOWN, time=1407872, rate=1 Mbps
callback
PKT: len=15, rssi=-96, src=UNKNOWN, time=1408232, rate=1 Mbps
callback
PKT: len=15, rssi=-96, src=UNKNOWN, time=1408600, rate=1 Mbps
callback
PKT: len=15, rssi=-96, src=UNKNOWN, time=1408992, rate=1 Mbps
callback
PKT: len=15, rssi=-96, src=UNKNOWN, time=1409360, rate=1 Mbps
callback
PKT: len=15, rssi=-96, src=UNKNOWN, time=1409720, rate=1 Mbps
callback
PKT: len=15, rssi=-96, src=UNKNOWN, time=1410096, rate=1 Mbps
callback
PKT: len=15, rssi=-96, src=UNKNOWN, time=1410456, rate=1 Mbps
callback
PKT: len=15, rssi=-96, src=UNKNOWN, time=1410840, rate=1 Mbps
callback
PKT: len=15, rssi=-96, src=UNKNOWN, time=1411384, rate=1 Mbps
callback
PKT: len=15, rssi=-96, src=UNKNOWN, time=1411616, rate=1 Mbps
callback
PKT: len=15, rssi=-96, src=UNKNOWN, time=1412352, rate=1 Mbps
callback
PKT: len=15, rssi=-96, src=UNKNOWN, time=1412440, rate=1 Mbps
callback
PKT: len=15, rssi=-96, src=UNKNOWN, time=1412808, rate=1 Mbps
callback
PKT: len=15, rssi=-96, src=UNKNOWN, time=1413016, rate=1 Mbps
callback
PKT: len=15, rssi=-96, src=UNKNOWN, time=1413384, rate=1 Mbps
D4f6aa720f15aa01a59fa77c9ac7ee46?d=identicon&s=25 Valerio, Danilo (Guest)
on 2009-04-24 17:30
(Received via mailing list)
Yep!

It works also here between USRPs2 with the code from colby's branch
(also with other parameters, as far as interp*spb=~200).
The problem is the DSSS... I don't know why, but whenever Barker is
enabled, nothing works anymore... :-(
Have you tried?

Colby mentioned that even the test has problem with Barker.

Best Regards,
Danilo


On Friday 24 April 2009 14:15:36 Ben Yahmed wrote:
> Good News!!!!
> I finally succeeded to receive with an USRP2 packets sent with another
> USRP2. I tryed to modify the parameters and found the magic combination:
>
>
> ./bbn_80211b_tx.py -f 2.4G -e eth1  -i 24 -r 20
<cut>
>   ./bbn_80211b_rx.py -f 2.4G -v
<cut>
745d8202ef5a58c1058d0e5395a78f9c?d=identicon&s=25 Eric Blossom (Guest)
on 2009-04-24 19:42
(Received via mailing list)
On Fri, Apr 24, 2009 at 02:15:36PM +0200, Ben Yahmed wrote:
> Good News!!!!
> I finally succeeded to receive with an USRP2 packets sent with another
> USRP2. I tryed to modify the parameters and found the magic combination:

Yeah!

Eric
F8c67168687ff78ffe36b97ad5764f66?d=identicon&s=25 Colby Boyer (Guest)
on 2009-04-24 20:40
(Received via mailing list)
Hi,

I am unable to replicate the results.  Are you using the code from the
CGRAN
repo without any modifcations?

I am also receiving a "usrp2::ctor reset_db failed" error.  Could this
be a
problem?

Thanks,
Colby
F8c67168687ff78ffe36b97ad5764f66?d=identicon&s=25 Colby Boyer (Guest)
on 2009-04-24 21:23
(Received via mailing list)
It was a firmware problem, and after updating the latest firmware I was
able
to transmit/receive at 1Mbps.

-Colby

Good work everyone! =)
165991260d0639bb7ac84c99339b4ee9?d=identicon&s=25 unknown (Guest)
on 2009-04-25 23:34
(Received via mailing list)
The next step is to convert the simple_mac.py inorder to work with
USRP2.
Who is interested in this work?

Ben Yahmed
F8c67168687ff78ffe36b97ad5764f66?d=identicon&s=25 Colby Boyer (Guest)
on 2009-04-27 06:40
(Received via mailing list)
I think some of the work my group will require porting the mac layer to
the
USRP2. I'll keep the list posted.

--Colby
F8c67168687ff78ffe36b97ad5764f66?d=identicon&s=25 Colby Boyer (Guest)
on 2009-04-27 19:43
(Received via mailing list)
Has anyone been able to get 2Mbps to work, which uses DQPSK instead of
DBPSK?  I have had no luck, even with the test script. . .

--Colby
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