Hello
I am running my code in Python using Gnuradio and USRPs. The program is
supposed to work continuously till an interrupt is given. The code works
well for 10-15 iterations and then terminates stating "command terminated
by signal 11". What could be the possible reason behind it. I tried to
go
Hi Activecat
The description that you have given matches quite closely to my
requirements. Kindly send me the sample code. I will try it out with my
setup.
>We need to set_max_noutput_items() to a small value, so that the block
>response fast enough to the ACK signal.
>This block should continuou
>
> Hi Activecat,
>
This is true that I am trying to accomplish the same task that you have
mentioned . But the difference is:
1. I pass a threshold value to my "test_demo" block from the
"top_block"(Example: top_block(options, 0.4)). A random number is generated
inside the "test_demo" block and c
iterations?
I hope it explains everything.
On Mar 11, 2014 7:28 PM, "Activecat" wrote:
> Dear Sumedha Goyal,
>
> > The "test_demo" checks for a "start sign"(given by the user) and
> > participates in data transmission process and upon receiving an ACK
Hello
The flowgraph of my top_block has test_demo as one of the blocks. The
work() function associated with it has only one print statement.
When I execute the flowgraph, the statement keeps on printing the statement
" I AM IN WORK" on the screen. Why does it happen?
My flowgraph is :
File source-
n".
Therefore, I need my flowgraph to execute several times.
I hope this description explains my intention. I am not very familiar with
scheduler. How can I use the scheduler to do this?
On Tue, Mar 11, 2014 at 3:12 PM, Activecat wrote:
> On Tue, Mar 11, 2014 at 5:04 PM, Martin Braun wr
Hello
I am executing a flowgraph where I pass different parameters to the work()
function of my block in every iteration.
1. I would like my flowgraph to execute once with a certain set of
parameters and on satisfying a certain condition, it should stop execution
(even if the queue/buffer of the
Is it possible to use both the antennas of USRP as receive antennas? For
example TX/RX should work on frequency f1 as a receive antenna and RX2
should work on frequency f2 as another receive antenna. Also, USRP should
be able to collect data from both the antennas simultaneously. How can I
approach
i)
Could you help me in sorting this out?
Regards,
Sumedha
On Wed, Dec 18, 2013 at 10:23 PM, Tom Rondeau wrote:
> On Wed, Dec 18, 2013 at 11:29 AM, Sumedha Goyal
> wrote:
> > Hi Tom,
> >
> > I have removed tb.wait(). Now the sequence is
> >
> > tb=top_bl
control back to main loop.
Regards,
Sumedha
On Wed, Dec 18, 2013 at 8:43 PM, Tom Rondeau wrote:
> On Wed, Dec 18, 2013 at 1:39 AM, Sumedha Goyal
> wrote:
> >
> >
> > -- Forwarded message --
> > From: Sumedha Goyal
> > Date: Wed, Dec 18, 2013 a
-- Forwarded message --
From: Sumedha Goyal
Date: Wed, Dec 18, 2013 at 12:04 PM
Subject: Re: [Discuss-gnuradio] problem with top_block.stop()
To: Tom Rondeau
Hi
Following is my gdb backtrace output. Could this be of any help?
What should I look for in this backtrace to locate
-- Forwarded message --
From: Sumedha Goyal
Date: Wed, Dec 18, 2013 at 10:50 AM
Subject: Re: [Discuss-gnuradio] problem with top_block.stop()
To: Tom Rondeau
Hi
My flowgraph does not stop naturally. I want to stop and start it again
using different value for a parameter as
I am trying to pass two different parameters to my top_block class
I m not able to do this please help. The control of program gets stuck at
tb.stop() and doesn't go beyond that.
tb=top_block(options,0.8)
tb.start()
tb.wait()
tb.stop()
sleep(5)
print "I AM BACK"
tb1=top_block(options,0.4)
tb1.star
I am experimenting with the one of the flowgraph examples
"uhd_tx_dpsk.grc". I am able to see the complex number output in WX GUI
NUMBER SINK block but I want to collect this output in a text file. If I
use a "FILE SINK" block, it shows some symbols but nothing in the form of
x+jy. Kindly suggest s
from
> collisions. You could read the "Zig-Zag decoding" paper by Shyamnath
> Gollakota and Dina Katabi from SIGCOMM 2008.
>
>
> http://groups.csail.mit.edu/netmit/wordpress/wp-content/themes/netmit/papers/ZigZag.pdf
>
> Aditya
>
>
>
> On Fri, Nov
I have a setup of one receiver and two transmitters. I am implementing a
TDMA structure (using USRPs and GNURADIO) where only one packet is sent in
each slot. When both transmitters try to transmit in the same slot,
collision occurs. I would like to know
1. How can the receiver detect whether a col
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