hi
thanks for the reply,but i want some paramters to be specified in one tab
and some other in other tab.is it possible? pls do help.
Ranjini
On Sun, Feb 27, 2011 at 12:54 AM, Sivaramakrishnan B C <
maverick2...@gmail.com> wrote:
Use the notebook block under "misc" caegory in grc.
Siva
On Sat,
Hello Arya,
AS> I was trying to build the gnuradio on yet
AS> another machine running Ubuntu 10.10. from
AS> source today after checking out the latest
AS> code from the dev trunk:
I see Ubuntu 10.10 has native packages. Is there a
reason why you need to compile it? Perhaps you are
l
Hi Jared, thanks for that suggestion.
Anyway, I realized that I was using GNU compiler gcc-4.6
(experimental) which apparently imposes stricter rules and allows
package builds to fail where previous versions used to succeed. So the
suggested fix for one typical "ptrdiff_t does not name a type" is
schrieb Moeller on 2011-02-26 13:11:
> Sync problems? I thought, the "audio" devices implement
> a fixed sampling clock and the USB transmission is buffered to
> achieve a continuous stream without gaps or clock variations.
> Only the PC audio output has a different clock, but that problem
> occurs
National Instruments also has some nice RF tutorials on their web site.
In particular, I found this one very helpful in understanding I/Q data:
http://zone.ni.com/devzone/cda/tut/p/id/4805
Warm regards,
James S. Blachly, MD
On Feb 22, 2011, at 6:04 PM, Brett L. Trotter wrote:
> Is there one o
I was on a call the other night with someone who asserted that you
didn't need an I & Q representation
for a direct-conversion receiver, and that I and Q could be
synthesized later from a real-mode-only
baseband signal.
I know that very-early (1940s) direct-conversion receivers didn't use I
a
Yes, it is possible:
For a bandpass signal at f_0 with bandwidth 2W, if you sample with rate:
Rs=4f_0/(2n+1) where n is an integer
you will get the in-phase components at the even samples and the
quadrature components
at the odd samples.
In particular, if you set
n= integer part of (f0/2W -1/2
On Sat, Feb 26, 2011 at 12:34 AM, Brett L. Trotter wrote:
> I've got several different flowgraphs here that upon shutting down some
> portion of the time, they emit a series of errors and then totally tank
> my USB controller on a number of test systems, requiring a full system
> reboot to reset t
On Wed, Feb 16, 2011 at 1:50 PM, Thomas Nitsche wrote:
> Hi,
> we are doing some research here on decoding 802.11g using GNURadio. As far
> as i know there is code available for transmission of 802.11g frames on
> CGRAN but no receiver code. Is there any work going on for the receiver side
> righ
On Sat, Feb 19, 2011 at 4:52 AM, ichigo.san wrote:
>
> Hi,
>
> I was wondering if there is a method to have a source block constantly
> sending out "0" and once it recieves a message from python, e.g a packet,
> it
> will then stream the message and switch back to sending "0" when done.
>
> I've
On Wed, Feb 23, 2011 at 4:07 PM, Phelps Williams wrote:
> I have what I would suspect is a common dilemma with the gnuradio
> architecture. I have a udp socket which is providing me a packets at less
> than the bitrate being transmitted by the usrp. The datagrams being
> received by the udp soc
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'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 p
On Fri, Feb 25, 2011 at 3:47 PM, peng senl wrote:
>
>
> > The legacy driver or UHD? Are you using 32-bit complex
> > floats or
> > 16-bit complex shorts for you data?
>
> In my case, I am using GNU Radio with USRP2 in C++.
> The CPU usage for 5MHz is 30% with 3.2 G duo core CPU and around 70% for
On Sat, Feb 26, 2011 at 5:17 AM, Jay Gaona wrote:
> Hello everyone,
>
> I've added a dual usrp sink block and duplicated the tx flow graphs in
> benchmark_tx.py example. However, I am unable to transmit packets when I set
> the following in the flow graph:
>
> self.packet_transmitter = \
> b
On Sat, Feb 26, 2011 at 8:00 AM, Antoine Dedave <
qlmqny_anti_r...@hotmail.com> wrote:
> Hi,
>
> I'm implementing a 2-FSK modulator (I Know that a good one already exists
> but
> i have to do it myself for academic purpose).
>
> To do so, i produce a given (N) number of samples corresponding to t
On Sun, Feb 27, 2011 at 6:51 AM, Arya Santini wrote:
> Hi Jared, thanks for that suggestion.
>
> Anyway, I realized that I was using GNU compiler gcc-4.6
> (experimental) which apparently imposes stricter rules and allows
> package builds to fail where previous versions used to succeed. So the
> s
On 27.02.2011 17:28, Marcus D. Leech wrote:
> I was on a call the other night with someone who asserted that you
> didn't need an I & Q representation
> for a direct-conversion receiver, and that I and Q could be
> synthesized later from a real-mode-only
> baseband signal.
...
> So, my feelin
I've put together a script for building GnuRadio+UHD for both Ubuntu
recent and Fedora recent.
I've attached it.
This is outgrowth of a script I put together and distributed to a few
people several years ago, but it has
been updated quite a bit and supports both Ubuntu and Fedora.
Your mil
On 02/27/2011 06:16 PM, Moeller wrote:
As long as you receive the complete signal bandwidth, you can create the I/Q
form later.
Of course you need the double sample rate, if there's only the real "baseband"
representation. I call it baseband, but you can also call it IF with the lowest
possible
On 28.02.2011 00:22, Marcus D. Leech wrote:
> But for a zero-IF, direct-conversion, with only a single baseband output
> (single mixer), I don't see how you
>can make it work.
A real valued zero-IF "universal" (modulation independent) receiver does not
exist.
I think you have the a demodulat
On 02/27/2011 06:41 PM, Moeller wrote:
A real valued zero-IF "universal" (modulation independent) receiver does not
exist.
I think you have the a demodulating receiver in mind that relies on
symmetry in the baseband spectrum, like for AM. In this concept, "baseband"
is the real valued audio base
> When you say "2x" performance increase, do you mean CPU performance or
> send()/recv() latency? Do you mind saying a few words on what changes
> you have made?
>
Much of the performance gains involved removing things out of the
fast-path that only needed to be called once at initialization (f
The graphical widgets all take a notebook parameter which is
notebook_id, tab_index. See the documentation in the various blocks.
-josh
On 02/26/2011 07:46 AM, ranjini ram wrote:
> hi
>
> can anybody help me out in creating multiple tabs in a single output
> window.eg.one tab indicating RF spect
Sorry if the question was re-posted.
Can anyone reply this entry level question?
In complex data representation such as the attached image by grc,
the LPF cut the frequency in both direction(+/- freq)
which the center frequency is 0Hz
http://www.fungkai.com/~howie/sdr/complex_1_basefreq0.gif
On 02/27/2011 07:57 PM, rono wrote:
> Sorry if the question was re-posted.
>
>
> Can anyone reply this entry level question?
>
>
> In complex data representation such as the attached image by grc,
> the LPF cut the frequency in both direction(+/- freq)
> which the center frequency is 0Hz
>
>
I think I made some progress in diagnosing the UHD/Beagleboard USRP1 issue.
I've tried bitbaking Philip's GNU Radio 3.2.1 recipe and the compilation fails
because of the libusb-0.1.12 link, more specifically the "libusb-gnur.a"
library. For some reason GCC is expecting the library to have the
Does anybody know about output power of a USRP antenna, in voltage and
ampere ?
I'm trying to make a circuit connected with a USRP antenna port.
And, in the future, the human body will replace the circuit
Of course, it's a kind of experimental.
So, If I send a sinusoidal signal with magnitude 35
Cool thanks for the reply.
The reason I am doing this is because I am trying to transmit signals at
different times... and testing shows the interleave block acts like the sync
type blocks you mention. I am guessing the same idea can be applied and make
a new interleave block and inherits from th
I just tested the next branch with 2.4 and the only incompatibility
was a "with" statement in gr_xmlrunner.py.
The "with" statement was introduced in 2.5.
Once that was removed the "make check" ran fine.
The replacement for the "with" statement was:
fss = _fake_std_streams()
fss.__enter__()
try
On Sun, Feb 27, 2011 at 11:39 PM, Almohanad Fayez wrote:
> I think I made some progress in diagnosing the UHD/Beagleboard USRP1 issue.
> I've tried bitbaking Philip's GNU Radio 3.2.1 recipe and the compilation
> fails because of the libusb-0.1.12 link, more specifically the
> "libusb-gnur.a" libra
Thanks for your kindly reply.
Can you explain more that, both sides from the center frequency of the
input frequency has been cut by a low pass filter.
Doesn't a low pass filter allow the lower frequency to pass?
Thanks,
Rono
On 28/02/11 12:22, Josh Blum wrote:
On 02/27/2011 07:57 PM, r
p { margin-bottom: 0.08in; }
Hello Tom,
Here is how I collect the data:
I am using the example
rx_streaming_samples.cc to collect data. I disabled the function
copy_u2_16sc_to_host_16sc() in the example.
I think the program keeps calling bool
ok
Hello,
I have eight (08) USRP N210s that has been synchronized using 10MHZ and 1PPS
reference. I am receiving data from them using a gigabit ethernet switch to
my computer.
My question is when I will receive packets from all of them through a single
switch, how will I know the time reference for
33 matches
Mail list logo
