Hi,
I don't think it is the problem of channel since your channel is symmetric.
Perhaps you could check your parameters first and list the commands you
used to the mailing list. Usually I use benchmark in
/gr-digital/examples/ofdm and it works well.
BTW, your gmail account is some kind of cool ..
tion, right? Perhaps the VOLK lib will help, I will try it out.
Sincerely,
--
Yang, Qing
Information Engineering, CUHK
2012/8/28 Tom Rondeau
> On Mon, Aug 27, 2012 at 7:07 AM, Qing Yang wrote:
> > Hi there,
> >
> > I am currently doing a OFDM transceiver project based on
ctive. That's why I want to profile python code rather than
C++ code.
Sincerely,
--
Yang, Qing
Information Engineering, CUHK
2012/9/1 Tom Rondeau
> On Fri, Aug 31, 2012 at 7:10 AM, Christian Gagneraud
> wrote:
> > On 28/08/12 09:21, Qing Yang wrote:
> >>
> >> H
> On Tue, Aug 28, 2012 at 4:21 AM, Qing Yang wrote:
> > Hi everyone,
> >
> > Where can I find a concrete example on how to profile the gnuradio code
> in
> > Python?
> >
> > My PC is Linux 2.6.35-32-generic-pae #67-Ubuntu SMP Mon Mar 5 21:23:19
> UT
ion, why
do you guys recommend Oprofile?
Sincerely,
--
Yang, Qing
Information Engineering, CUHK
2012/8/28 Tom Rondeau
> On Tue, Aug 28, 2012 at 4:21 AM, Qing Yang wrote:
> > Hi everyone,
> >
> > Where can I find a concrete example on how to profile the gnuradio code
>
Hi everyone,
Where can I find a concrete example on how to profile the gnuradio code in
Python?
My PC is Linux 2.6.35-32-generic-pae #67-Ubuntu SMP Mon Mar 5 21:23:19 UTC
2012 i686 GNU/Linux. I use Ubuntu 10.10 and Xeon W3530.
I can use Kcachegrind to profile code written in C++. But when I prof
Hi there,
I am currently doing a OFDM transceiver project based on RawOFDM. We want
to implement 20MHz bandwidth transmit/receive, but the RawOFDM code seems
to support only narrow band (<1MHz). Once I set the sample-rate larger than
1MHz, my program will block with overrun messages (more details
ive.
>
> In my case, most CPU time is used by memmove (about 40%!). Unfortunately,
> I wasn't able to figure out where it gets called from.
>
> Best regards,
> Felix
>
> [1] http://oprofile.sourceforge.net/doc/index.html
>
>
> Am 24.08.2012 08:28, schrieb Qing Yang:
Hi Josh,
I also meet the "L" output. Does this mean the USRP cannot send the packet
out in time? What should I do to depress or avoid this error message?
Furthermore, can you explain the meaning of "U" and "O" output to the
console?
--
Yang, Qing
Information Engineering, CUHK
2012/8/25 Josh B
Hi Felix,
Currently I also need to profile and optimize my system. Now I just add
some some sentences to print the processing time of each block, but this is
definitely not a good method. Could you describe your profiling method in
more details, perhaps your results can be a reference for me.
Hi
Hi Alex,
I run benchmark_ofdm on my equipments. It can support 20MHz transmitting
and receiving. I run the commands
~/grforwarder_ylz/gr-uhd/apps$ ./benchmark_tx.py -f 2.485G -W 20M
~/grforwarder_ylz/gr-uhd/apps$ ./benchmark_rx.py -f 2.485G -W 20M
the receiver works well.
However, when I use t
I have enabled the real-time scheduling in my PCs. And my USRPs are
connected to PCs via direct link of a Gigabyte ethernet card.
I am now trying the volk.
--
Yang, Qing
Information Engineering, CUHK
2012/8/7 Nathan West
> On Tue, Aug 7, 2012 at 10:12 AM, wrote:
>
>> **
>>
>> On 06 Aug 2012
exactly what I have tested. The data rate of OFDM
>> based on the current GNURadio never exceeds 1Mbps with acceptable PER.
>> I guess the only way to beat more bandwidth is to use very strong
>> computer...
>>
>> On Mon, Aug 6, 2012 at 10:12 AM, Qing Yang wrote:
>
Dear all,
Recently we are building an OFDM communication system based on RawOFDM(
http://people.csail.mit.edu/szym/rawofdm/README.html). In the simplest
point-to-point
case, we use a pair of PC and USRP as the transmitter and use another pair
as the receiver.
To reduce the influence of CFO, we ne
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