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Found 12 results

  1. Hi all, I want to do an implementation of Faster than Nyquist Signalling using GNU-RADIO. I know it is very much related to the OFDM case which I have successfully implemented but how do I integrate the FTN blocks into the OFDM case?
  2. Hello, I got Hackrf One, and am trying to work with it on my raspberry pi. I am constantly getting the following error: hackrf_info: symbol lookup error: hackrf_info: undefined symbol: hackrf_device_list I tried everything. First installing gnu-radio via apt-get and building hackrf master from source code, it didn't work. Then I removed gnu-radio and installed it by PyBombs which a lot of people recommended, but it didn't work as well. My last try was downloading the source codes of gnu-radio, osmosdr, iqbal by git clone and building them one by one which took days for gnu-radio
  3. Has anyone ever got PyBOMBS to work in Ubuntu 16.04? After following the instructions from their GitHub page (https://github.com/gnuradio/pybombs/), both pip install and building from source, I'm running into the same error when trying to run gnuradio-companion. root@robot:/pybombs# pybombs run gnuradio-companion PyBOMBS - INFO - PyBOMBS Version 2.2.0 Traceback (most recent call last): File "/home/pike/prefix/bin/gnuradio-companion", line 99, in <module> run_main() File "/home/pike/prefix/bin/gnuradio-companion", line 87, in run_main from gnuradio.grc.main import ma
  4. at present I am using this live distro: ubuntu-14.04.4-desktop-amd64-gnuradio- (but in the near future I will have a dedicated Linux PC). I have noticed that some blocks are missing... in particular I can find only 2 "source" blocks which are related to various SDR radios (BTW I have an HackRF One) but there are supposed to be more than 2 sources only!. questions: 1) wheresoever can I find the missing blocks? 2) and, moreover, how I can I load/compile or...them so that I can use them in GNUradio Companion??? thanks in advance for your contributio
  5. Hello everyone, I'm trying to understand the demodulation theory and thus understand the GnuRadio graphs implementing software demodulation. I'm still a bit stuck on the bare basics, so here are my questions: 1. I understand that the rational resampler can be used to lower the number of received samples by using the decimation parameter. This is helpful for speeding up the software operations while still keeping the quality. Low-level filter also has the decimation parameter, why isn't that one usually used for decimation? In what case would we use filter's decimation? 2. I understand that
  6. For those of us who want to explore a little more with SDR and own a hackrf or rtlsdr, but not a yardstick one (yet): https://funoverip.net/2014/07/gnu-radio-cc1111-packets-encoderdecoder-blocks/ The decoder module may also help with working out what those bits should be as well.
  7. Hi, I just tried install airprobe in my ubuntu. following tutorial from http://www.rtl-sdr.com/rtl-sdr-tutorial-analyzing-gsm-with-airprobe-and-wireshark/ I have install gnuradio by build script, even until : ./go.sh capture_941.8M_112.cfile everything seems okey.. but when I moved to next step, I got: tes@tes-H67M-D2-B3:~/Downloads/airprobe/gsm-receiver/src/python$ ./gsm_receive_rtl.py -s 1e6 Traceback (most recent call last): File "./gsm_receive_rtl.py", line 22, in <module> import osmosdr ImportError: No module named osmosdr has anyone another idea where the problem migh
  8. Hey All, I am now trying for weeks to setup Gnuradio Companion (3.7.5) with my RTL 2832U... I installed the RTL-SDR and the gr-osmosdr driver as described on Osmocom's Website. "rtl_test -t" works as well as "osmocom_fft -a rtl=0 -v -f 100e6 -s 2.4e6 -g 15" so I think those drivers are properly installed. Nevertheless no source blocks appear in Gnuradio Companion. So does anyone know what I did wrong or what I could try? Is there a fault in the cmake process of gr-osmosdr (cmake output: http://textuploader.com/651n )? Do I need those disabled components: Osmocom IQ Imbalance Correction,
  9. I've spent countless hours trying to get GNURadio-Companion to install along with the needed "source blocks" to make an RTL-SDR Dongle work. Online documention on this is very poor. But I've got it to work, and just for fun I did it twice! This How-To assumes you're running a freshly installed Ubuntu 14.04.1 LTS & assumes you're sort of a newbie to Linux as I am. Below are the commands you type, do not include the quote signs. 1) Log into a desktop terminal 2) Make sure you're in your home directory by typing "cd ~" 3) Type "sudo apt-get install git-core" 4) Type "sudo apt-get install
  10. Well, I've been playing with the gnu radio live DVD for a while now, and decided that it might just be easier for me to install the thing on a spare laptop... so I looked for an 'install' option but never found one. On a whim, I decided to use 'sudo dd if=/home/me/gnu.iso of=/dev/sda' to simply throw the image on the laptop hard drive... this was done with a differ computer, of course. I've never tried to write an image directly to a hard drive, so this was sort of an experiment for me. The end result was a bootable gnu radio laptop hard drive. Everything was awesome until I realized wha
  11. I'm new to the forum, so first off, HI! Obviously, the latest toy for the Hak5 world is SDR... to be more specific, ADS-B!! It's definately fun, I think everyone would agree. After seeing Darren fire up the LiveCD to show us python code, I went ahead and did the same. All of the command line stuff is the same, but the stupid icons on the desktop are killing me :) I can get everything else to work, except what should be obvious. The four that show up on the desktop are 'GNU Radio Companion', 'GQRX', 'Mode-S Aircraft Monitor', and 'UHD Spectrum Analyzer.' There aren't many tutorials ou
  12. Does anyone happen to have any good GNURadio resources they have been using?
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