Just a thought. Could this be the overhead of the new stream tags? Since I
didn't see it before.
On Thu, Nov 3, 2011 at 10:23 PM, Tuan (Johnny) Ta wrote:
> Josh,
>
> I've upgraded to 3.5rc0. The same thing happened. I got some more details:
>
> When I ran benchmar
the
new implementation of gnuradio and/or the UHD driver? Or is there any other
possible explanation?
Thank you,
Johnny
On Thu, Nov 3, 2011 at 4:54 PM, Josh Blum wrote:
>
>
> On 11/03/2011 01:28 PM, Tuan (Johnny) Ta wrote:
> > Hello all,
> >
> > I just came across
Hello all,
I just came across a strange behavior in the digital benchmark examples
that I haven't seen before. The transmitter wouldn't stop itself after it
finishes sending the requested data size (specified by -M argument).
Keyboard interrupt (ctrl+C) has no effect. I had to stop it with ctrl+Z
I second Peter. As long as you make sure in your gray-coded QPSK
constellation, 0 is mapped to +1 and 1 is mapped to -1 then XOR is
equivalent to multiplication.
On Mon, Oct 31, 2011 at 1:59 PM, Peter Massam wrote:
>
> In general you're right, but it depends on the details. Its usually quite
> s
r the
turn-around time (from TX to RX) of the XCVR2450?
Johnny
On Mon, Oct 31, 2011 at 6:51 PM, Marcus D. Leech wrote:
> On 10/31/2011 06:40 PM, Tuan (Johnny) Ta wrote:
>
>> Marcus,
>>
>> What do you mean my zero-stuffing the TX frames? And how would it help
>> w
before the
real packet arrives?
Johnny
On Mon, Oct 31, 2011 at 6:22 PM, Marcus D. Leech wrote:
> **
> On 10/31/2011 06:01 PM, Tuan (Johnny) Ta wrote:
>
> I have been running into problems using tunnel.py as well so instead of
> creating a new post I thought I'll just continue
I have been running into problems using tunnel.py as well so instead of
creating a new post I thought I'll just continue this thread.
My setting:
USRP2
XCVR2450
Ubuntu 10.04 (32bit)
The problem I have is that after running tunnel, whenever I do ping, my
system gets stuck on the ARP exchange. Say
Vijay,
Can you post a GRC file with full-duplex configuration? I have the XCVR2450
board so I know I can only get half-duplex. Does the GRC full-duplex flow
graph for the WBX board achieve half-duplex for the XCVR2450 board?
Thanks,
Johnny
On Mon, Mar 14, 2011 at 12:37 PM, Vijay Pillai wrote:
>
I'm also interested in this problem. Juan Ramon, did you make any progress?
If you did, would you mind sharing it?
For Marcus, I have a more general question regarding the flow graph. If I
have in my GRC both a UHD sink and a UHD source block, is it true that the
USRP2 will stay in receive mode un
Can you elaborate on how exactly you solved this problem without using GRC?
What kind of interprocess communication did you use?
Thanks,
Johnny
On Tue, Sep 13, 2011 at 10:08 AM, Lebowski80 wrote:
>
> Hi Nick,
>
> I just wanted tell you that I solved my problem using interprocess
> communication,
Awesome work Martin!!
Johnny
On Mon, Oct 10, 2011 at 5:43 PM, Matt Ettus wrote:
>
>
> Thanks for doing this. The new site looks great!
>
> Matt
>
> On Mon, Oct 10, 2011 at 12:58 AM, Martin Braun wrote:
>
>> On Sun, Oct 09, 2011 at 12:38:44PM -0400, Tom Rondeau wrote:
>> > [Website]
>> >
>> > A
Quick correction
cd /usr/share/gnuradio/examples/ofdm/
./benchmark_ofdm_tx.py -h
On Sun, Sep 11, 2011 at 7:26 PM, Tuan (Johnny) Ta wrote:
> Try this
> cd /usr/share/gnuradio/examples/ofdm/
> benchmark_ofdm_tx.py -h
>
> Don't forget the spaces (just copy & paste should wo
Try this
cd /usr/share/gnuradio/examples/ofdm/
benchmark_ofdm_tx.py -h
Don't forget the spaces (just copy & paste should work)
On Sun, Sep 11, 2011 at 7:19 PM, waqasme wrote:
>
> hello Johnny,
> I tried that locate command and i have found the location of the files
> .here
> is the output:
> hp
You seem to be quite new to Linux, what do you intend to do for your Master
thesis? Gnuradio is not something you can master in a couple of months.
To go to a directory, you need to use the 'cd' command. Ie
cd /usr/local/bin
My benchmark_ofdm code is not in /usr/local/bin so when you get to that
Thanks Marcus, that was very informative!
On Fri, Sep 9, 2011 at 8:00 PM, Marcus D. Leech wrote:
> On 09/09/2011 07:26 PM, Tuan (Johnny) Ta wrote:
>
>> As far as I know there's no open source code for an OFDM transceiver
>> available. I was trying to build one half
As far as I know there's no open source code for an OFDM transceiver
available. I was trying to build one half a year back but wasn't successful
before I had to move on to something else. The benchmark_ofdm code will give
you a simplex OFDM system. Ie you can run the transmitter on 1 USRP and
recei
problems, you need to synchronize the
> USRPs with an external reference, i.e. a GPS receiver.
>
> Scott
>
> Tuan (Johnny) Ta wrote:
>
>> Martin,
>>
>> Thanks for the suggestion! I think it's a good idea. I remember having a
>> lot of problems wit
you,
Johnny
On Tue, Aug 30, 2011 at 3:25 AM, Martin Braun wrote:
> On Mon, Aug 29, 2011 at 11:19:39PM -0400, Tuan (Johnny) Ta wrote:
>
> Hi everyone,
>
> I actually think doing something *with* GNU Radio is the more
> interesting part, at least at the beginning. How about you st
Patrik,
I'm not sure I understand what you're saying. I know my knowledge is limited
especially my coding skill (I come from a more theoretical background). And
I think the best way to learn is to watch others do it first and practice.
I'm sorry if that's completely off your point.
Johnny
On Mon
Very interesting ideas. Thanks Marcus for sharing! Unfortunately I don't
have enough background in compiler to implement such ideas. I'm in the phase
of learning GNU Radio, keeping up with its fast development is already a big
task for me. I'm certainly willing to do something *to* GNU Radio when I
I'm very excited for the upcoming conference. The issue is I haven't worked
on GNU Radio for almost a year. And I see that there're quite a few changes.
Even when I was working with GNU Radio, I couldn't say that I was very
comfortable with it.
*So my question is in the next 2 weeks, what can I do
got it! thanks :)
On Tue, Apr 5, 2011 at 3:22 AM, Martin Braun wrote:
> On Mon, Apr 04, 2011 at 03:58:55PM -0400, Tuan (Johnny) Ta wrote:
> > Hello list,
> >
> >
> > What is the best way to look for some class using the Doxygen http://
> > gnuradio.org/doc/d
Hello list,
What is the best way to look for some class using the Doxygen
http://gnuradio.org/doc/doxygen/index.html? E.g. I want to look for the
description of gr_message_source, how do I find it?
Cheers,
Johnny
___
Discuss-gnuradio mailing list
Discus
There's not much documentation on the benchmark code rather than what's
included in the folder. You'll need to go through the code to understand its
operation.
johnny
On Tue, Mar 1, 2011 at 3:27 PM, Varun Krishnamurthy <
varun.sumkr...@gmail.com> wrote:
> Hi,
>
> I want to implement OFDM on gnu
Sounds great. I'll give it a shot and report the result later.
On Sun, Feb 27, 2011 at 4:30 PM, Tom Rondeau wrote:
> On Wed, Feb 23, 2011 at 5:41 PM, Tuan (Johnny) Ta wrote:
>
>> A lot of people seem to have problem with the OFDM receiver in gnuradio.
>> Since there
A lot of people seem to have problem with the OFDM receiver in gnuradio.
Since there's no confirmation of a working *2-way* communication using OFDM
yet, I've decided to dig into the OFDM receiver implementation. I want to
test the performance of the OFDM synchronization block. To do that, first I
Hi list,
I'm writing a program to use QAM using a combination of Matlab and gnuradio
(QAM demod hasn't been implemented in gnuradio). My Matlab code does all of
the baseband signal processing, produces a complex vector of samples at the
transmitter. It also takes a complex vector of samples to dec
e.
> You can find the code at github.com/benreynwar/gnuradio.
> There's an example file in my repo at
> gnuradio-examples/python/digital/simple_qam.py.
>
> Cheers,
> Ben
>
> On Thu, Dec 9, 2010 at 8:41 AM, Tuan (Johnny) Ta
> wrote:
> > Didn't look hard en
Didn't look hard enough. I found the matlab utils in
/gnuradio-core/src/utils
Since there's no write_complex_binary.m I guess I'll need to output my
complex samples in 2 files, one for I and one for Q.
On Thu, Dec 9, 2010 at 10:31 AM, Tuan (Johnny) Ta wrote:
> Hi list,
>
&g
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