|Subject:||Re: [Discuss-gnuradio] [Openlte-discuss] Error while building openLTE code on USRP|
|Date:||Thu, 3 Oct 2013 07:39:42 -0500|
thank you for your answer.
My previous question was bit strange.
There are to functions of you, once the dl_file_scan and once the only dl_scan function.
I did undertood that the dl_file_scan function kinda works with USRP, but I was not sure about the dl_scan function.
I read here that dl_scan does not support USRP:
Is it still valid: Does the dl_scan function still not suppoert USRP?
OR can we by adding the resampler block run it?
When I did run the dl_scan function, it (probably the osmo code) recognized the USRP2/N-SERIES device and got overflow alerts (“D”).
I don’t undertand, if that means that the dl_scan function works with the USRP2/N but needs some resampling?
So from your mail, I thought first the addition of the “resampler” is only valid for the dl_file_scan function, till I managed to run the dl_scan, thatswhy I am confused.
Lastly, (this is probably my job).
I don’t know if one can create from your source files grc flowcharts. I looking for that right now. Then, it would be “easy” to add a resampling block to your code.
If not, could you also please give a hint about how it can be done in your source code?
I believe that you will need to add a resampler to the openLTE code in order to run on a USRP. I don't have a USRP myself, but I believe that they only allow sample rates that are integer divisions of 100Msps (except the USRP B200 series). In order to get a valid LTE sample rate (30.72, 15.36, 7.68, 3.84, or 1.92Msps), you will need to add a resampling block.
As you mentioned, I am using the gr-osmosdr blocks to interface currently to rtl-sdr and hackRF. There is support in gr-osmosdr for USRP, but it will need to be handled in the flowgraph.
Hope this helps,
On Mon, Sep 30, 2013 at 7:21 AM, Dincer Beken <address@hidden> wrote:
Sorry but I think I mailed to early.
On a normal gnuradio distribution from the build-gnuradio.py -m” code on Fedora, I did not experience the problems while build and install.
I am checking out the code right now..
Regarding OSMO and RTL-SDR, I did understand it like the libraries can detect and work with USRP, so that’s probably clear, too.
When using those libraries with USRP, are there any specific changes that I should make for some blocks etc.?
I am new to Gnuradio and USRP. I want to try the openLTE Project on my USRP N210.
During the cmake process I am getting the following errors:
CMake Warning at CMakeLists.txt:92 (find_package): Could not find a configuration file for package "Gnuradio" that is compatible with requested version "3.7.0".
The following configuration files were considered but not accepted:
/usr/local/lib/cmake/gnuradio/GnuradioConfig.cmake, version: 3.8.git.0
Also since I am not using one of the following devices:
I also get :
-- checking for module 'gnuradio-osmosdr' -- package 'gnuradio-osmosdr' not found -- Could NOT find GNURADIO_OSMOSDR (missing: GNURADIO_OSMOSDR_LIBRARIES GNURADIO_OSMOSDR_INCLUDE_DIRS) -- checking for module 'librtlsdr' -- package 'librtlsdr' not found -- Could NOT find RTLSDR (missing: RTLSDR_LIBRARIES RTLSDR_INCLUDE_DIRS) -- checking for module 'libhackrf' -- package 'libhackrf' not found -- Could NOT find HACKRF (missing: HACKRF_LIBRARIES HACKRF_INCLUDE_DIRS) -- checking for module 'fftw3f >= 3.0' -- found fftw3f , version 3.3 -- Found FFTW3F: /usr/lib/libfftw3f.so CMake Error at CMakeLists.txt:99 (message): GNURadio required to compile openLTE
After that, I changed in the cmake file the required Gnuradio Version manually to 3.8. Now I am getting only the OSMO / RTL errors:
· -- checking for module 'gnuradio-osmosdr' -- package 'gnuradio-osmosdr' not found -- Could NOT find GNURADIO_OSMOSDR (missing: GNURADIO_OSMOSDR_LIBRARIES GNURADIO_OSMOSDR_INCLUDE_DIRS) -- checking for module 'librtlsdr' -- package 'librtlsdr' not found -- Could NOT find RTLSDR (missing: RTLSDR_LIBRARIES RTLSDR_INCLUDE_DIRS) -- checking for module 'libhackrf' -- package 'libhackrf' not found -- Could NOT find HACKRF (missing: HACKRF_LIBRARIES HACKRF_INCLUDE_DIRS) CMake Error at CMakeLists.txt:103 (message): GNURadio Osmosdr required to compile openLTE (http://sdr.osmocom.org/trac/wiki/GrOsmoSDR)
From the discuss Forum of gnuradio, I read that it is possible to run it with USRP (USRP2)
How can I ignore those libraries or replace them?
And can I use this code on the USRP?
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