A multiply constant block is needed to reduce the level for actual
transmission with an SDR. It should be set to 1 / (number of active
carriers).
Also an odd number of carriers produces a cleaner spectrum. Updated flow
graph attached.
Ron
On 3/26/19 04:55, Ron Economos wrote:
Just use an
Just use an inverse FFT. Flow graph attached.
In the vector source, just zero out carriers you don't want.
Ron
On 3/26/19 00:45, on4...@telenet.be wrote:
Hi group,
I want to create 10 or 20 or 30 carriers all spaced evenly at 250Khz
apart.
How can i do this, any tips?
thanks
Use a polyphase filterbank. It's not runtime reconfigurable in GR, but if you
create the correct spacing with the max you'll ever need then you can always
optionally direct the output of some to a null sink. Hope this is useful! - MLD
On Tue, Mar 26, 2019, at 3:46 AM, on4...@telenet.be wrote:
>
Hi group,
I want to create 10 or 20 or 30 carriers all spaced evenly at 250Khz apart.
How can i do this, any tips?
thanks
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Hi,
I'm playing with the howto example as shown by the following link on a
Macbook Pro machine.
http://gnuradio.org/redmine/projects/gnuradio/wiki/OutOfTreeModules
I can go until $make. When I run $make test, an error pops up and shows
$ make test
Running tests...
Test project
On Thu, May 22, 2014 at 2:25 PM, Pengyu Zhang zhange...@gmail.com wrote:
Any idea how could I get over this problem?
Looking through my howto files, I have that import line commented out but
then again I was playing around with python only things.
Hi Pengyu - The way testing works right now under OSX (assuming you're using
OSX and MacPorts, yes?), you have to specify -all- of the dependency paths
correctly before calling GR_ADD_TEST. The test_howto is probably a C++
compiled executable, which CMake will know how to link correctly
Hello,
I using a usrp1 populated with 2 LF-RX and 2 LF-TX.
I want to use 2 DDCs the I-inputs of which are connected to the 2 ADCs on LF_RX
A (Q-inputs to gnd).
In pre-uhd times I used to use set_mux, but now the API seems to have changed.
The following code produces the error message:
On 05/26/2013 05:00 AM, Wolfgang Buesser wrote:
Hello,
I using a usrp1 populated with 2 LF-RX and 2 LF-TX.
I want to use 2 DDCs the I-inputs of which are connected to the 2 ADCs on
LF_RX A (Q-inputs to gnd).
In pre-uhd times I used to use set_mux, but now the API seems to have changed.
Hi josh,
thank's for the hint - but this is not quite what I want to do:
In the future I want to use 4 separate inputs - this is for a
network-analyzer with 2 directional couplers for S11, S21, S12, S22.
For a start I want to use only RX-board A with 2 different signals on
both inputs. This
On 05/26/2013 05:49 AM, Wolfgang Buesser wrote:
Hi josh,
thank's for the hint - but this is not quite what I want to do:
In the future I want to use 4 separate inputs - this is for a
network-analyzer with 2 directional couplers for S11, S21, S12, S22.
For a start I want to use only
Hm,
with this
self.u_rx.set_subdev_spec(A:A A:B,0)
I get a segfault:
#!/usr/bin/python
Hi
I am having problems selecting the subdev with USRP1:
My USRP1 is populated with 2 LFRX and 2 LFTX.
I am trying the following code:
--
#!/usr/bin/python
On Sa, 2013-05-25 at 10:56 -0400, Marcus D. Leech wrote:
On 05/25/2013 10:45 AM, Wolfgang Buesser wrote:
On Sa, 2013-05-25 at 10:15 -0400, Marcus D. Leech wrote:
On 05/25/2013 03:28 AM, Wolfgang Buesser wrote:
Hi
I am having problems selecting the subdev with USRP1:
My USRP1 is
On 05/25/2013 11:55 AM, Wolfgang Buesser wrote:
On Sa, 2013-05-25 at 10:56 -0400, Marcus D. Leech wrote:
On 05/25/2013 10:45 AM, Wolfgang Buesser wrote:
On Sa, 2013-05-25 at 10:15 -0400, Marcus D. Leech wrote:
On 05/25/2013 03:28 AM, Wolfgang Buesser wrote:
Hi
I am having problems
On Wed, Nov 21, 2012 at 11:16:34AM -0500, Brooke Hayden wrote:
I am also working on completing the tutorial and have got the same error. I've
You'll have to elaborate on that. The same error as others have been
having?
only edited the files the tutorial instructed me to. How would I manually
MB,
I am also working on completing the tutorial and have got the same error.
I've only edited the files the tutorial instructed me to. How would I
manually import howto_swig?
Also, I'm using 3.6.2, but gr-howto-write-a-block was only 3.6.0 when I
found it.
Thanks
Trying to get howto-write-a-block to work. 'ctest -V' gives errors like:
../gr-howto-write-a-block-3.6.0/lib/qa_howto_square_ff_test.sh: 8:
qa_howto_square_ff: not found and the same for square2_ff.
File /home/tim/SDR/gr-howto-write-a-block-3.6.0/python/qa_howto.py, line
24, in module
3:
Hi Brooke,
are you mixing hand-edited code and files generated by gr_modtool?
Also, can you manually import howto_swig from the build/swig dir?
Besides, if you're getting started, 3.6.0 is not the newest version of
GNU Radio.
MB
On Mon, Nov 19, 2012 at 03:08:50PM -0500, Brooke Hayden wrote:
On Wed, Feb 23, 2011 at 4:07 PM, Phelps Williams phel...@gmail.com 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
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 socket are variable in size and message timing is not
regular.
If
Does that make it seem like I have multiple installations (and if so, which
ones should i remove)? How else could I find out?
Thanks for the help,
Mike
--- On Mon, 11/1/10, Eric Blossom e...@comsec.com wrote:
From: Eric Blossom e...@comsec.com
Subject: Re: [Discuss-gnuradio] howto module
Hello, I posted this a week ago and received no response. Any comments or
suggestions would be greatly appreciate.
I recently got python programs to successfully import the howto
module, but I cannot use the functions:
Python code:
#!/usr/bin/env python
from gnuradio import gr
import howto
On Mon, Nov 01, 2010 at 03:29:25PM -0700, Michael Civ wrote:
Hello, I posted this a week ago and received no response. Any comments or
suggestions would be greatly appreciate.
I recently got python programs to successfully import the howto
module, but I cannot use the functions:
Hello, I recently got python programs to successfully import the howto module,
but I cannot use the functions. Any help or suggestions would be greatly
appreciated:
Python code:
#!/usr/bin/env python
from gnuradio import gr
import howto
class my_top_block(gr.top_block):
def
Hi All,
for those who want to read the binary value by hand,
the binary value is saved as 2*32bit value.
32bit -- I
and
32bit -- Q
And are saved one after another,
I1 Q1 I2 Q2 I3 Q3 I4 Q4 ...
No we look at I1 and describe how it will be computed by hand:
For example:
BIN:
Doing this presents another problem. When I run make I get an error that
indicates that PYTHON is undefined in my Makefile.am (line 56).
This is because the aclocal.m4 file generated by just running ./configure
after removing the old aclocal.m4 file does not contain this the
AM_PATH_PYTHON(...)
When I try to make the howto package (from the How to write a signal
processing block tutorial), I get and error which says:
Version mismatch error. This is libtool 2.2.6, but the definition of this
LT_INIT comes from libtool 2.2.4.
Then it indicates that I need to recreate aclocal.m4. I have
On Sun, 22 Mar 2009 14:51:55 -0400, William Harding wphardi...@gmail.com
wrote:
When I try to make the howto package (from the How to write a signal
processing block tutorial), I get and error which says:
Version mismatch error. This is libtool 2.2.6, but the definition of
this
LT_INIT
On Sun, Mar 22, 2009 at 01:51:55PM -0500, William Harding wrote:
When I try to make the howto package (from the How to write a signal
processing block tutorial), I get and error which says:
Version mismatch error. This is libtool 2.2.6, but the definition of this
LT_INIT comes from libtool
Thank you Eric, but doing this present another problem. When I run make I
get an error that indicates that PYTHON is undefined in my Makefile.am
(line 56).
This is because the aclocal.m4 file generated by just running ./configure
after removing the old aclocal.m4 file does not contain this the
Hi,
I am still quite new to the USRP and GNU-radio, but I managed to write my
first piece of code for the USRP to behave like a network-analyzer. I have 2
questions:
1)I would like to just dump 2X-1000 complex samples into 2 files and then
quit (without keyboard or mouse interaction). But after
Hi,
I wonder if it is possible to tune the RF frequency in blocks writtenin c++.
In python, statementsas the followare used to tune the frequency of RF board.
r = u.tune(0, subdev, freq)
I want to adjust the receiver's RF according that of the transmitterautomatically with some frequency offset
On Mon, Jul 10, 2006 at 06:16:59PM +0800, 2 1 wrote:
Hi,
I wonder if it is possible to tune the RF frequency in blocks written in
c++.
In python, statements as the follow are used to tune the frequency of RF
board.
r = u.tune(0, subdev, freq)
I want to adjust the receiver's RF
Thanks, Eric. Would you please tell me the exact C++ functions which do the tuning?
Is there any C++ class relating the usrp class in python?
hanwen2006/7/10, Eric Blossom [EMAIL PROTECTED]:
On Mon, Jul 10, 2006 at 06:16:59PM +0800, 2 1 wrote: Hi, I wonder if it is possible to tune the RF
On Tue, Jul 11, 2006 at 10:03:11AM +0800, hanwen wrote:
Thanks, Eric. Would you please tell me the exact C++ functions which do the
tuning?
You can shift the frequency by multiplying by a complex exponential.
# Local oscillator
lo = gr.sig_source_c (if_rate,# sample
On Sat, Dec 10, 2005 at 12:17:36PM -0500, [EMAIL PROTECTED] wrote:
It is related to the python path resolution. If I go to the
/usr/local/lib/python/site-packages/gnuradio it works. Moving to just one
level higher and it does not.
It's the same location as the other gnuradio packages, very
: [Discuss-gnuradio] Howto Write a Block
On Fri, Dec 09, 2005 at 06:19:24PM -0500, [EMAIL PROTECTED] wrote:
I am trying to make a new by following the gr-howto-write-a-block. I was
able to successfuly make myself a local directory structure with all the
required file and compile the howto_square(2
I am trying to make a new by following the gr-howto-write-a-block. I was
able to successfuly make myself a local directory structure with all the
required file and compile the howto_square(2)_ff.cc.
I also so did a 'make check' in the src directory and it work good.
Now the question is how do
On Fri, Dec 09, 2005 at 06:19:24PM -0500, [EMAIL PROTECTED] wrote:
I am trying to make a new by following the gr-howto-write-a-block. I was
able to successfuly make myself a local directory structure with all the
required file and compile the howto_square(2)_ff.cc.
I also so did a 'make
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