Hi,
I am writing an application for which I want to keep the latency to a
minimum, and this involves trying to keep the buffers between the blocks as
empty as possible. Basically, I have a source block with an element size of
512 bytes that accepts data through a public member function. If there
I guess I can throw in a couple of pennies here...
Here at KIT we have a couple of students hacking GR-related projects,
and most of them get something running within reasonable time, provided
they've had some kind of previous programming experience.
Here's some of the advice I give them:
On
Hello:
I have a USRP2 board and a WBX daughterboard. I am trying to implement a scheme
where a single-tone sine wave (at frequencies between 1 kHz and 10 kHz) is
transmitted intermittently. Specifically, time is divided into intervals,
defined by the user on the command line, typically of
On 11/29/2010 03:24 AM, Martin Braun wrote:
FWIW, a lot of people think GNU Radio is hard. Personally, I find the
hardest bit is understanding signal processing. And no tool in the world
can make that simple. If you really know how the DSP works, getting GNU
Radio to do thy biddings is
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Hi list,
over the weekend I spend some time trying to update the demos to work
with the UHD, I just started playing with git, so if you see something
stupid let me know ;-)
I put what I got on (in the uhd-examples branch):
Hi, I was trying to get the code from ettus git repository, but without
success.
Is anyone else having trouble with this? And where I can get the code?
Euripedes
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On Mon, Nov 29, 2010 at 4:02 AM, Moritz Fischer
fisc...@int.uni-karlsruhe.de wrote:
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Hi list,
over the weekend I spend some time trying to update the demos to work
with the UHD, I just started playing with git, so if you see something
stupid let
Hi everyone,
Just a reminder about the meetup we will be having at the SDR
Technical Conference in Crystal City on Wednesday night starting at
7:30.
You can find the conference program here:
http://conference.wirelessinnovation.org/mc/page.do?sitePageId=119381orgId=s1
Importantly, the location
Are you behind a firewall blocking git? You may want to try the http mirror:
http://code.ettus.com/redmine/ettus/projects/uhd/wiki#Get-the-source
-Josh
On 11/29/2010 08:14 AM, Euripedes Rocha Filho wrote:
Hi, I was trying to get the code from ettus git repository, but without
success.
Is
Eric,
In my experiments, I had one transmitter and one receiver, which used
tunnel.py for communicating with each other. Occasionally, I got the
problem that one radio stopped receiving, but could still transmit. I
used TX and RX printings to observe this behavior. In the receiving
path,
On Mon, Nov 29, 2010 at 08:42:14AM +0100, antonb wrote:
Hi,
I am writing an application for which I want to keep the latency to a
minimum, and this involves trying to keep the buffers between the blocks as
empty as possible. Basically, I have a source block with an element size of
512 bytes
On Mon, Nov 29, 2010 at 12:42:38AM -0800, Steve Mcmahon wrote:
Hello:
I have a USRP2 board and a WBX daughterboard. I am trying to
implement a scheme where a single-tone sine wave (at frequencies
between 1 kHz and 10 kHz) is transmitted
intermittently. Specifically, time is divided into
Think of the on/off part as a control stream consisting of 1's and
0's. Generate the control stream, and multiple the control stream by
the carrier stream.
Don't try to start and stop the graph or anything like that from
python.
You can probably generate the control stream with a
On 11/29/2010 01:35 PM, Steven Clark wrote:
One would think something like this would work, but I've noticed that
even if you're sending 0's to your usrp sink, the transmitter still
puts out some amount of power (plenty strong enough to be detectable
via a spec-an). This power goes away if
Yes, LO leakage, more specifically DC imbalance in the I and Q channels; I
assume you are using a daughter board with an IQ modulator? This is
supposedly corrected for in the firmware, however, probably not done over
temperature. You can probably tweak it by adding/subtracting a few LSB of
DC
I'm currently confronted with a sample rate vs. symbol time issue.
I noticed that the E100 announcement mentioned a flexible clocking feature to
deal with exactly this type of thing. I've been looking on the Ettus site for
more information, but haven't been able to locate any.
Is there any
Thanks Marcus.
You did manage to tie up several loose ends, and I really appreciate it!
All the best.
Vlad.
Marcus D. Leech wrote:
On 11/28/2010 06:53 PM, Vladutzzz wrote:
Marcus,
First of all thank you for your reply!
I have some questions about your very much appreciated
What would be the best way to work with a 32 MHz band resulting from USRP2?
I guess, since the minimum decimation rate is 4 (resulting in a 25 MHz
signal band), some kind of interpolation will be required or maybe
resampling?!
Any ideas on how to proceed?
Thanks in advance!
Vlad.
--
View this
What would be the best way to work with a 32 MHz band resulting from USRP2?
I guess, since the minimum decimation rate is 4 (resulting in a 25 MHz
signal band), some kind of interpolation will be required or maybe
resampling?!
Any ideas on how to proceed?
Thanks in advance!
Vlad.
The
Hi,
Has anyone got a noise blanker module for gnuradio?
Thanks 73,
Rob
KL7NA
--
Rob Frohne, Ph.D., P.E.
E.F. Cross School of Engineering
Walla Walla University
100 SW 4th Street
College Place, WA 99324
(509) 527-2075 http://people.wallawalla.edu/~rob.frohne
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