Correlation doesn't always return real numbers, only if its the correlation
of the same the PN sequence(including phase). The received signal could
have a phase shift, complex numbers are needed.
On Mon, Jul 13, 2009 at 8:48 AM, Jordan J Riggs wrote:
> I'm not an expert on the matter, but I sus
You can read the files with Matlab or Octave.
http://www.mail-archive.com/discuss-gnuradio@gnu.org/msg09567.html
This should explain it.
On Sun, Jul 5, 2009 at 8:14 PM, wrote:
> Hi,
>
> I am trying to use C++ to read data from the USRP. I've compiled an
> example found at the following address
ering. Just
seeing if there was a short cut ;).
Thanks for your feed back Matt.
On Wed, Jun 24, 2009 at 1:12 PM, Matt Ettus wrote:
> Colby Boyer wrote:
>
>> Say from 100MHz to 88MHz?
>>
>
> You would need to change out the oscillator. There are pin compatible ones
>
This question is relating to the USRP2. I apologize for leaving that detail
out.
On Wed, Jun 24, 2009 at 6:33 AM, Colby Boyer wrote:
> Thats cute.
>
> I am serious though.
>
> On 6/24/09, Daniel O'Connor wrote:
> > On Wed, 24 Jun 2009, Colby Boyer wrote:
>
Thats cute.
I am serious though.
On 6/24/09, Daniel O'Connor wrote:
> On Wed, 24 Jun 2009, Colby Boyer wrote:
>> Say from 100MHz to 88MHz?
>
> Have you purchased a flux capacitor from Ebay?
>
> :)
>
> --
> Daniel O'Connor software and networ
Say from 100MHz to 88MHz?
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Hey All,
With barker code problem mostly solved, I want to look more in depth at
higher modulation (CCK) rates, 5.5 and 11 Mbps. I've read through the IEEE
specs and for the most part understand the scheme. Since the sample rate is
not high enough to send/receive enough samples per chip, the sam
.
--Colby
On Mon, Jun 15, 2009 at 10:48 AM, Douglas Geiger <
doug.gei...@bioradiation.net> wrote:
> If I get some free time (probably next week), I'll try it out between my
> USRP2's. Thanks!
> Doug
>
> On Sun, Jun 14, 2009 at 10:45 PM, Colby Boyer wrote:
>
>>
poorly written line of python in the init blocks.
However, it only appears once and a while for me. I am using GNURadio
version 10689.
Eric, do you know what causes this bug or have you seen/heard of it before?
Regards,
Colby Boyer
On Mon, Jun 15, 2009 at 5:38 AM, Ulrika Uppman wrote:
> Hi
rates. Can someone test with USRP2? Also the BER seems to be
much better as compared to just the RRC filter. Hopefully this will make
TX/RX much more robust.
The code is uploaded to the CGRAN svn under the branch/usrp2_version in the
bbn project directory.
Cheers,
Colby Boyer
figure out the reason of this, we can send to the list our
> small modifications.
>
> Cheers,
> Danilo
>
> Colby Boyer wrote:
>
>> Hi All,
>>
>> I uploaded my latest code to the SVN. I implemented 2 Mbps (DQPSK) packet
>> transmission and it works in simula
, but it all works in simulation so it should work. One
of my co-workers will be able to test it sometime soon as I dont have access
to a USRP2.
Cheers,
Colby Boyer
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Hi Greg,
We are using the USRP2, which should have just enough bandwidth to handle
the full bandwidth of the signal.
As a side note, I think I almost have 2Mbps tx/rx working. I've set it up so
that it successfully merges a header and payload that have been modulated at
different rates. I think I
Hi Andrea,
In the GNU Radio code base
(trunk/gnuradio-core/src/python/gnuradio/blks2impl) you can find DBPSK and
DQPSK modulators, which are used by the benchmark_tx/rx files found in the
gnuradio-example directory. I looked at the python code and the modulators
are using a raised cosin as the TX
Hi Everyone,
I think I understand the problem with the DBPSK/DQPSK. Currently, the
modulate function modulates the entire packet as 2Mbps. However, the PLCP
decode function expects the packet to be DBPSK for the header and then DQPSK
for rest of the payload.
The solution I have devised is to rew
DQPSK. The
decoding algorithm then fails.
--Thanks
On Tue, May 12, 2009 at 7:37 AM, Doug Geiger wrote:
> -BEGIN PGP SIGNED MESSAGE-
> Hash: SHA1
>
> Colby Boyer wrote:
> > Hi all,
> >
> > So I am not too familiar with the history of how GNU-Radio has evolv
Hi XiaoMing,
If you are using the USRP I, I recommend you go here to download the code
https://www.cgran.org/wiki/BBN80211. Follow the instructions to download the
correct version of gnu radio from the SVN and compile the BBN source. There
should be a README file that comes with the BBN code that
Hi all,
So I am not too familiar with the history of how GNU-Radio has evolved over
the past few years and I am wondering what are the fundamental differences
between blks and blks2(old revisions vs new revisions)?
A question I am asking is why did the BBN people who wrote the 802.11b code
make t
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
On Sun, Apr 26, 2009 at 9:39 PM, Colby Boyer wrote:
> I think some of the work my group will require porting the mac layer to the
> USRP2. I'
n Yahmed
>
> > It was a firmware problem, and after updating the latest firmware I was
> > able
> > to transmit/receive at 1Mbps.
> >
> > -Colby
> >
> > Good work everyone! =)
> >
> > On Fri, Apr 24, 2009 at 11:23 AM, Colby Boyer
> > wr
It was a firmware problem, and after updating the latest firmware I was able
to transmit/receive at 1Mbps.
-Colby
Good work everyone! =)
On Fri, Apr 24, 2009 at 11:23 AM, Colby Boyer wrote:
> Hi,
>
> I am unable to replicate the results. Are you using the code from the
> CGRAN
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
On Fri, Apr 24, 2009 at 10:41 AM, Eric Blossom wrote:
> On Fri, Apr 24, 2009 at 02
I ran the test script with the barker code as the TX/RX filter and I am
unable to decode packets. When the SPB is set to 2, I can decode some of the
packets. You have to set the use of barker codes manually in the test
script.
Has anyone else encountered this problem?
Thanks,
-Colby
___
To confirm, you were able to receive 802.11b using the USRP2?
On Wed, Apr 22, 2009 at 5:57 PM, Doug Geiger wrote:
> -BEGIN PGP SIGNED MESSAGE-
> Hash: SHA1
>
> Colby Boyer wrote:
> > What changes did you have to make to the sample/baud rate?
> >
> > Ho
wrote:
> -BEGIN PGP SIGNED MESSAGE-
> Hash: SHA1
>
> Colby Boyer wrote:
> > Hi all,
> >
> > As some of you know, I am working on porting the BBN 802.11b code to the
> > USRP2. I understand that the ADC/DAC rates are higher than the USRP1.
> What
> > a
Hi all,
As some of you know, I am working on porting the BBN 802.11b code to the
USRP2. I understand that the ADC/DAC rates are higher than the USRP1. What
are the effects, if any, on the rate at which symbol are sent through the
air? I am suspect that this could be the reason I cannot decode sen
Hi all,
Is it possible to increase the TX power of the 2.4 GHz cards or is it fixed?
Thanks,
Colby
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demodulate the packets from reading the sample data from a
file. So TX is working(?) unless something is going wrong with
initializing/sending stuff to the hardware.
So perhaps the rx is not correctly reading samples in from the USRP2?
Thoughts?
Colby
On Fri, Apr 17, 2009 at 10:53 AM, Colby Boyer
Hi Ben,
I uploaded my files to the usrp2_version in the CGRAN server. It uses the
same files I used to run my USRP2 tests, so it should interface with the
hardware correctly. Let me know if it does not.
Bests,
Colby
On Fri, Apr 17, 2009 at 10:15 AM, Colby Boyer wrote:
> Hi Ben,
>
>
annel.
Has anyone have any success on receiving packets between two USRP2s? When
RX/TX there is a usrp2::ctor reset db failed error. Could this cause
problems for the RX/TX? I am using the firmware that was shipped with the
USRP2.
Thanks,
Colby Boyer
On Wed, Apr 15, 2009 at 10:40 AM, Ben Y
)?
Also, does anyone know if the BBN code on the USRP could communicate with
hardware 80211b (ASIC) equipment? I've heard that there are issues with ack
latency. If there is a problem, did the BBN people bother to implement the
acks in their code?
Regards,
Colby
Great to hear. I will be able to start testing with two USRPs soon. I am
waiting on some hardware. I will let the list know what I find out.
On Fri, Apr 3, 2009 at 9:09 AM, Eric Blossom wrote:
> On Fri, Apr 03, 2009 at 10:45:18AM -0300, Tiago Rogério Mück wrote:
> > I fixed the problem. The top_
ossamer-threads.com/lists/trac/users/40954
>
> It should not affect the svn server though.
>
> - George
>
>
> 2009/3/30 Colby Boyer
>
>> The cgran server seems to be down. I'll let you know when I am able to
>> get an account.
>>
>> On Mon, Mar 3
The cgran server seems to be down. I'll let you know when I am able to get
an account.
On Mon, Mar 30, 2009 at 8:36 AM, Colby Boyer wrote:
> Sure. I will try to get a cgran account and upload my code to their SVN. It
> would then be easy to see the changes I made.
>
>
> On
(built largly
upon Douglas's work) with rest of the GNU radio community.
Regards,
Colby Boyer
On Fri, Mar 27, 2009 at 2:06 AM, Costantini, Andrea wrote:
> Dear all,
>
> I'm trying to port the Douglas BBN 802.11b code on the USRP2 working with
> the last version of GNU-Radio
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