On Wed, Jun 04, 2008 at 09:33:33PM -0700, Chris Stankevitz wrote:
>
> Thanks again. Is it ever possible for all of these things to happen:
>
> 1. write data to disk using cfile
> 2. hard drive cannot keep up for whatever reason (new sector, etc) and data
> is lost
> 3. A USRP "overrun" condition
Chris-
> > I've seen cases before where the drive does handle the throughput as
> > advertised, but
> > on an average basis. Under sustained, continuous write circumstances, when
> > the drive
> > reaches a new sector, multiple of sectors, or some other internal space
> > boundary,
> > extra t
Jeff Brower wrote:
I've seen cases before where the drive does handle the throughput as
advertised, but
on an average basis. Under sustained, continuous write circumstances, when the
drive
reaches a new sector, multiple of sectors, or some other internal space
boundary,
extra time is taken fo
Chris-
> > Is there a way for you to temporarily take file-write out of the equation?
> > I.e. can
> > your code look at the bitstream and know if it remains continuous / intact?
> >
> > The "every minute or two" thing makes me suspicious that some HDD related
> > thing is
> > going on. 16 MBb
Hi All,
I understand that I am asking a question that has been asked several
times --- how to enable synchronous transmission from two antennas?
Basically, I want see if I could send two streams through two antennas
simultaneously while the symbols of the two streams are synchronized.
I found thi
I understand. Thank you!
On Wed, Jun 4, 2008 at 1:22 PM, Eric Blossom <[EMAIL PROTECTED]> wrote:
> On Wed, Jun 04, 2008 at 12:30:49PM -0400, Wireless Monster wrote:
> > Hi all,
> >
> > Is it possible to use the "gr_interp_fir_filter_fff" block directly
> inside a
> > new block I am building in C
From: [EMAIL PROTECTED]: [EMAIL PROTECTED]: Tue, 3 Jun 2008 21:11:39
-0400Subject: [gsm] gnuradio gsmsp?
Has anyone gotten gsmsp to work with the latest gnuradio code base? I had to
chang flow_graph to top_block and use blks2impl but it still dies with:
guest:~/temp/gsm/gsmsp-0.2a$ ./run.s
On Wed, Jun 04, 2008 at 12:30:49PM -0400, Wireless Monster wrote:
> Hi all,
>
> Is it possible to use the "gr_interp_fir_filter_fff" block directly inside a
> new block I am building in C++? Any example available on how to do it?
>
> Thanks for your help,
>
> [WM]
Unless you were building a hie
I have sampled continuously for many hours without problems. I had a
setup with USRP syncronized to an external clock. I have then measured
a constant frequency sinusoid derived out of the same clock and
verified that the ratio of consecutive complex samples was always
constant (up to a certain err
Hi all,
Is it possible to use the "gr_interp_fir_filter_fff" block directly inside a
new block I am building in C++? Any example available on how to do it?
Thanks for your help,
[WM]
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irene159 wrote:
Hello,
I am using blks2impl dqpsk modulator/demodulator.
Since demodulator's "samples_per_symbol" value must be an integer >=2 and
USRP samples at 64 Msamples/s with a 2^(n) possible decimation, I have to
sample a 2100 kbps carrier (=1050 ksym/s).
I found two blocks that may ap
Hello again,
Sorry, I am not familiar with GNU Radio and I just keep coming up with new
questions...
I am simulating a transmission using IF - Base Band frequency conversion and
a channel_model block introducing noise and frequency offset. As I said I am
particularly interested in the Costas loo
Thank you very much. You have been of great help!
--
View this message in context:
http://www.nabble.com/Trace-mpsk_receiver_cc%28%29-tp17605464p17648942.html
Sent from the GnuRadio mailing list archive at Nabble.com.
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On Wed, Jun 04, 2008 at 03:21:25AM -0700, irene159 wrote:
>
> Hello,
>
> I am using blks2impl dqpsk modulator/demodulator.
>
> Since demodulator's "samples_per_symbol" value must be an integer >=2 and
> USRP samples at 64 Msamples/s with a 2^(n) possible decimation, I have to
> sample a 2100 kbp
> where is the inaccuracy in sampling frequency exactly happening?
> In USRP?
Yes - the sampling frequency is inaccurate, because the crystal on the
USRP is not oscillating at exactly 64 MHz.
FYI, the samples in the plot are actually not from an USRP (I didn't
record them myself) - the inaccuracy
Hi Andreas,
where is the inaccuracy in sampling frequency exactly happening?
In USRP?
Regards,
Hoo Chang Shin.
- Original Message
From: Andreas Müller <[EMAIL PROTECTED]>
To: discuss-gnuradio@gnu.org
Cc: [EMAIL PROTECTED]
Sent: Wednesday, June 4, 2008 12:48:00 PM
Subject: Re: [Discuss-
Hello Per
> What is the cause of the problems. Clock jitter ?, non-linearities ?
>
No idea what could be the problem in your case, but maybe try also
plotting the phase of all symbols in one OFDM symbol vs the offset from
the central carrier.
I'm currently working on DAB and I found some probl
Hello,
I am using blks2impl dqpsk modulator/demodulator.
Since demodulator's "samples_per_symbol" value must be an integer >=2 and
USRP samples at 64 Msamples/s with a 2^(n) possible decimation, I have to
sample a 2100 kbps carrier (=1050 ksym/s).
I found two blocks that may apparently be used
irene159 wrote:
OK, so far I have been able to call gr.mpsk_receiver_cc.freq() from dqpsk.py
even if I haven't found were it is coded.
print "NCO frequency : %f" % self.receiver.freq()
My purpose is to study mpsk_receiver_cc Costas loop features and I would
like to get Costas loop NCO f
OK, so far I have been able to call gr.mpsk_receiver_cc.freq() from dqpsk.py
even if I haven't found were it is coded.
print "NCO frequency : %f" % self.receiver.freq()
My purpose is to study mpsk_receiver_cc Costas loop features and I would
like to get Costas loop NCO frequency value fo
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