# GNU Radio **URL:** https://www.ruby-forum.com/c/gnu-radio/15.md?page=6 [Latest](https://www.ruby-forum.com/latest.md) · [Categories](https://www.ruby-forum.com/categories.md) · [Tags](https://www.ruby-forum.com/tags.md) **Page:** 7 --- ## [GNU Radio Raspberry pi](https://www.ruby-forum.com/t/gnu-radio-raspberry-pi/243327)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 0\ **Last updated:** [September 16, 2015, 5:44pm UTC](https://www.ruby-forum.com/t/gnu-radio-raspberry-pi/243327 "2015-09-16T17:44:21Z")
Hello, I’m trying to get a signal strength value (RSSI) from one specific frequency through a RTL2832 USB stick. I’m trying to do all this at an Raspberry pi, with Debian 7. GNU radio itself is installed and it is sh… --- ## [Header files in sig\_source\_X\_impl.cc.t](https://www.ruby-forum.com/t/header-files-in-sig-source-x-impl-cc-t/243324)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 0\ **Last updated:** [September 16, 2015, 2:29pm UTC](https://www.ruby-forum.com/t/header-files-in-sig-source-x-impl-cc-t/243324 "2015-09-16T14:29:33Z")
Inside the source for sig\_source\_X\_impl.cc.t, there is a include file ‘#include “@IMPL\_NAME@”’. What is this? I am trying to make my own block using the same source code from the signal source block but it throws an e… --- ## [Strange peaks in OFDM signal](https://www.ruby-forum.com/t/strange-peaks-in-ofdm-signal/243325)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 0\ **Last updated:** [September 16, 2015, 1:04am UTC](https://www.ruby-forum.com/t/strange-peaks-in-ofdm-signal/243325 "2015-09-16T01:04:53Z")
Hello, I’m trying to transmit random data using OFDM system but I have strange problem. Like you can see on the picture I attached, there is quite high peak in the frequency spectrum (in the red rectangle). I am using… --- ## [Problem with qt and wx widgets](https://www.ruby-forum.com/t/problem-with-qt-and-wx-widgets/243323)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 0\ **Last updated:** [September 14, 2015, 8:17pm UTC](https://www.ruby-forum.com/t/problem-with-qt-and-wx-widgets/243323 "2015-09-14T20:17:53Z")
Hello, i have fresh ubuntu 14.04 and GRC (pybomb) install. I have problem running flowgraphs, they load but the wx or qt displays one frame and freeze. Using Volk machine: avx2\_64\_mmx (i5 4530). prefix for my instalat… --- ## [USRP Operating System](https://www.ruby-forum.com/t/usrp-operating-system/243309)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 0\ **Last updated:** [September 9, 2015, 8:50pm UTC](https://www.ruby-forum.com/t/usrp-operating-system/243309 "2015-09-09T20:50:59Z")
Hello, Recently I read a paper on cognitive radio security (Secure reconfiguration of software-defined radio). It highlights that the operating system of cognitive radio node may be compromised as the malware can exp… --- ## [\[USRP\] tracking the transmission/receiving process](https://www.ruby-forum.com/t/usrp-tracking-the-transmission-receiving-process/243299)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 2\ **Last updated:** [September 9, 2015, 8:36pm UTC](https://www.ruby-forum.com/t/usrp-tracking-the-transmission-receiving-process/243299 "2015-09-09T20:36:57Z")
Hello, I’ve been tracking the source code to figure out the procedure of transmission/receiving. All I’ve found out is that the parameters (e.g. freq, gain, etc.) are stored in a property tree, and messages are inser… --- ## [GRCon15 statistics](https://www.ruby-forum.com/t/grcon15-statistics/243308)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 2\ **Last updated:** [September 9, 2015, 4:24pm UTC](https://www.ruby-forum.com/t/grcon15-statistics/243308 "2015-09-09T16:24:31Z")
Hi! I’m curious about how many people assisted to the all the annual conferences, specially to the last one. And maybe there are more interesting statistics to know. Thanks! --- ## [Problems with setting up RFNoC environment within PyBombs](https://www.ruby-forum.com/t/problems-with-setting-up-rfnoc-environment-within-pybombs/243307)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 0\ **Last updated:** [September 9, 2015, 2:59pm UTC](https://www.ruby-forum.com/t/problems-with-setting-up-rfnoc-environment-within-pybombs/243307 "2015-09-09T14:59:13Z")
I have set up RFNoC environments in the past, but I am trying to embrace pybombs and am attempting to setup an environment now using that approach instead. I see on the rfnoc:-GettingStarted WiKi page, that it can’t b… --- ## [Display Problem with QT GUI Vector Sink](https://www.ruby-forum.com/t/display-problem-with-qt-gui-vector-sink/243237)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 6\ **Last updated:** [September 9, 2015, 2:16pm UTC](https://www.ruby-forum.com/t/display-problem-with-qt-gui-vector-sink/243237 "2015-09-09T14:16:00Z")
Dear all, I built an angle-of-arrival system using four Ettus USRP2. I’m facing a problem when trying to display a vector containing the calculated MUSIC-Spectrum using a “QT GUI Vector Sink”. The vector sink won’t d… --- ## [R: On the "right" approach for developing applications to be run on an E310](https://www.ruby-forum.com/t/r-on-the-right-approach-for-developing-applications-to-be-run-on-an-e310/243303)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 0\ **Last updated:** [September 9, 2015, 12:25pm UTC](https://www.ruby-forum.com/t/r-on-the-right-approach-for-developing-applications-to-be-run-on-an-e310/243303 "2015-09-09T12:25:00Z")
Da: Marcus Müller-3 \[via GnuRadio\] \[mailto:removed\_email\_address@domain.invalid\] Inviato: mercoledì 9 settembre 2015 11:38 A: Crozzoli Maurizio Oggetto: Re: On the “right” approach for developing applications to be … --- ## [On the "right" approach for developing applications to be run on an E310](https://www.ruby-forum.com/t/on-the-right-approach-for-developing-applications-to-be-run-on-an-e310/243230)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 3\ **Last updated:** [September 9, 2015, 12:03pm UTC](https://www.ruby-forum.com/t/on-the-right-approach-for-developing-applications-to-be-run-on-an-e310/243230 "2015-09-09T12:03:58Z")
Hi! We just received our brand new E310 and we are wondering what is the “right” approach for developing applications to be run on it. In fact we are a bit used to working with a B220 but that operating condition was… --- ## [Installing GNURadio Using build script](https://www.ruby-forum.com/t/installing-gnuradio-using-build-script/243300)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 2\ **Last updated:** [September 9, 2015, 5:36am UTC](https://www.ruby-forum.com/t/installing-gnuradio-using-build-script/243300 "2015-09-09T05:36:06Z")
Hello Everyone, When I try to install GNURadio using the build script provided the build-gnuradio script I get the following error. \[ 47%\] Building CXX object gr-filter/lib/CMakeFiles/test-gr-filter.dir/qa\_firdes.cc… --- ## [Reading ZMQ messages in Python](https://www.ruby-forum.com/t/reading-zmq-messages-in-python/243302)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 3\ **Last updated:** [September 9, 2015, 1:55am UTC](https://www.ruby-forum.com/t/reading-zmq-messages-in-python/243302 "2015-09-09T01:55:50Z")
Hello, I have a flowgraph that send ZMQ PUB messages generated by a custom OOT block. The messages transmitted by GNURadio ZMQ PUB block are received by a Python application, using a standard ZMQ Library. \[custom\_oot… --- ## [A small error in benchmark\_tx file](https://www.ruby-forum.com/t/a-small-error-in-benchmark-tx-file/243295)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 9\ **Last updated:** [September 8, 2015, 11:17pm UTC](https://www.ruby-forum.com/t/a-small-error-in-benchmark-tx-file/243295 "2015-09-08T23:17:31Z")
Hey Marcus, Thanks for the advise. I am sorry to reply lately. So you want me to reinstall the GNU Radio again to recover the original files? If so, then I might be able to do it because there is a new version of GNU… --- ## [Re: Running flowgraphs from command line](https://www.ruby-forum.com/t/re-running-flowgraphs-from-command-line/243291)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 2\ **Last updated:** [September 8, 2015, 8:09pm UTC](https://www.ruby-forum.com/t/re-running-flowgraphs-from-command-line/243291 "2015-09-08T20:09:23Z")
Hi, I did the following command, as suggested: Patricks-iMac:work patrick$ sudo port select python python27 Selecting ‘python27’ for ‘python’ succeeded. ‘python27’ is now active. Patricks-iMac:work patrick$ python if… --- ## [Re: Consolidated Logic at GRCon](https://www.ruby-forum.com/t/re-consolidated-logic-at-grcon/243296)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 0\ **Last updated:** [September 8, 2015, 7:24pm UTC](https://www.ruby-forum.com/t/re-consolidated-logic-at-grcon/243296 "2015-09-08T19:24:24Z")
My name is Ryan M., I’m a founder of Consolidated Logic, a new company based out of Blacksburg, VA working on an FPGA productivity tool we call RDA: Rapid Design Assembly. We had a booth at GRCon this year where we … --- ## [Problems closing a valve block with a Python Block](https://www.ruby-forum.com/t/problems-closing-a-valve-block-with-a-python-block/243297)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 0\ **Last updated:** [September 8, 2015, 7:15pm UTC](https://www.ruby-forum.com/t/problems-closing-a-valve-block-with-a-python-block/243297 "2015-09-08T19:15:39Z")
Hello: We have successfully used a GUI block to open (or close) a valve by pressing the mouse button. Now we want to open (or close) the valve from a Python block that we are writing after comparing two messages. If … --- ## [Ssb - question](https://www.ruby-forum.com/t/ssb-question/243288)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 4\ **Last updated:** [September 8, 2015, 7:13pm UTC](https://www.ruby-forum.com/t/ssb-question/243288 "2015-09-08T19:13:18Z")
Hi everybody Im trying to make SSB modulation with Hilbert transform. And Im using IQ modulator here is schema: http://postimg.org/image/gms5srret/ And I have a question. In Frequency domain there should be one peak… --- ## [Why cant I increase signal by 1 hz at a time with high frequencies?](https://www.ruby-forum.com/t/why-cant-i-increase-signal-by-1-hz-at-a-time-with-high-frequencies/243286)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 3\ **Last updated:** [September 8, 2015, 6:34pm UTC](https://www.ruby-forum.com/t/why-cant-i-increase-signal-by-1-hz-at-a-time-with-high-frequencies/243286 "2015-09-08T18:34:44Z")
It seems that when I create a signal source block and try and view the signal on a waterfall plot or FFT plot, I can not increase the signal by a granularity of 1 Hz at higher starting frequencies. Example: If I crea… --- ## [Running flowgraphs from command line](https://www.ruby-forum.com/t/running-flowgraphs-from-command-line/243293)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 4\ **Last updated:** [September 8, 2015, 3:23pm UTC](https://www.ruby-forum.com/t/running-flowgraphs-from-command-line/243293 "2015-09-08T15:23:42Z")
Hi everybody, I installed GNURadio on a fresh machine with Mac OS X 10.10.5 via MacPorts. I now have 2 Python installs in /usr/bin, python2.6 and python2.7. Running flowgraphs with GRC is no problem. However, when tr… --- ## [Noob question 1](https://www.ruby-forum.com/t/noob-question-1/243274)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 5\ **Last updated:** [September 8, 2015, 1:26pm UTC](https://www.ruby-forum.com/t/noob-question-1/243274 "2015-09-08T13:26:16Z")
Hello all 4 weeks ago did my first steps into Linux Ubuntu. I am trying to get the RTL-Dongel to work but still not succeded in that, Time to ask some help. There is a image with pre-installed drivers and GNU-Radio … --- ## [How can I separate and count the IQ samples stored](https://www.ruby-forum.com/t/how-can-i-separate-and-count-the-iq-samples-stored/243287)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 2\ **Last updated:** [September 8, 2015, 9:16am UTC](https://www.ruby-forum.com/t/how-can-i-separate-and-count-the-iq-samples-stored/243287 "2015-09-08T09:16:50Z")
How can I separate and count the IQ samples stored --- ## [Convolutional Code output does not match polynomial](https://www.ruby-forum.com/t/convolutional-code-output-does-not-match-polynomial/243201)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 1\ **Last updated:** [September 8, 2015, 8:14am UTC](https://www.ruby-forum.com/t/convolutional-code-output-does-not-match-polynomial/243201 "2015-09-08T08:14:55Z")
I am trying channel coding in gnuradio. I am using convolutional encoder with K=7 and R=1/2 with polynomials \[109, 79\] (default). However I am not getting the expected result. I input a known bit sequence, single fram… --- ## [Pybombs recipes submodule pointer update policy](https://www.ruby-forum.com/t/pybombs-recipes-submodule-pointer-update-policy/243267)
**Author:** [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Replies:** 4\ **Last updated:** [September 8, 2015, 4:38am UTC](https://www.ruby-forum.com/t/pybombs-recipes-submodule-pointer-update-policy/243267 "2015-09-08T04:38:09Z")
Hi all, I have question for pybombs developers/maintainers: Is there policy for updating recipes submodule pointer in the pybombs repository? Currently recipes submodule pointer is 29 days behind the head. – Best R… --- ## [Linking .so files to OOT module](https://www.ruby-forum.com/t/linking-so-files-to-oot-module/243284)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 0\ **Last updated:** [September 8, 2015, 2:23am UTC](https://www.ruby-forum.com/t/linking-so-files-to-oot-module/243284 "2015-09-08T02:23:47Z")
Hello everyone, I’m trying to create a source and sink block which will connect to a database to fetch and drop data. The interface to the database is created using shared libraries (.so files) that were defined by so… --- ## [ATSC decode successful on SDRPlay RSP](https://www.ruby-forum.com/t/atsc-decode-successful-on-sdrplay-rsp/243282)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 0\ **Last updated:** [September 8, 2015, 12:44am UTC](https://www.ruby-forum.com/t/atsc-decode-successful-on-sdrplay-rsp/243282 "2015-09-08T00:44:28Z")
Hi everyone. With help from Ron E., I managed to make ATSC decoding work using the SDRPlay RSP. The big issue was that the RSP has a DC bar in the middle of the waterfall. Canceling it in the SDR program isn’t enough;… --- ## [A small error in benchmark\_tx file](https://www.ruby-forum.com/t/a-small-error-in-benchmark-tx-file/243272)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 10\ **Last updated:** [September 8, 2015, 12:32am UTC](https://www.ruby-forum.com/t/a-small-error-in-benchmark-tx-file/243272 "2015-09-08T00:32:12Z")
Hi all, I have been trying to send data between 2 USRP’s from the benchmark\_tx file only to observe that I have been receiving this error. Traceback (most recent call last): File “./benchmark\_tx.py”, line 147, in m… --- ## [A small error in benchmark\_tx file](https://www.ruby-forum.com/t/a-small-error-in-benchmark-tx-file/243279)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 1\ **Last updated:** [September 8, 2015, 12:05am UTC](https://www.ruby-forum.com/t/a-small-error-in-benchmark-tx-file/243279 "2015-09-08T00:05:54Z")
Hi all, I have been trying to send data between 2 USRP’s from the benchmark\_tx file only to observe that I have been receiving this error. Traceback (most recent call last): File “./benchmark\_tx.py”, line 147, in m… --- ## [Throttle block form wav files](https://www.ruby-forum.com/t/throttle-block-form-wav-files/243242)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 8\ **Last updated:** [September 7, 2015, 5:38pm UTC](https://www.ruby-forum.com/t/throttle-block-form-wav-files/243242 "2015-09-07T17:38:34Z")
Hi, I’m using a flow graph with no GUI to demodulate a signal. I have a selector block that allows me to select the source of the signal between the audio card and a wav file. I can change the source using an xmlrpc … --- ## [Volk: \_\_cpuid\_count() for MSVC](https://www.ruby-forum.com/t/volk-cpuid-count-for-msvc/243275)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 0\ **Last updated:** [September 7, 2015, 4:33pm UTC](https://www.ruby-forum.com/t/volk-cpuid-count-for-msvc/243275 "2015-09-07T16:33:08Z")
I noticed since last time (a year ago) I tried building Volk using MSVC v16, the volk\_cpu.tmp.c now uses the gcc-centric function ‘\_\_cpuid\_count()’ which MSVC doesn’t have. I’m not really sure if the below patch is c… [Previous page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=5) [Next page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=7)