# GNU Radio **URL:** https://www.ruby-forum.com/c/gnu-radio/15.md?page=78 [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:** 79 --- ## [Best way to output decoded data to user](https://www.ruby-forum.com/t/best-way-to-output-decoded-data-to-user/240454)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 13\ **Last updated:** [April 16, 2014, 1:57pm UTC](https://www.ruby-forum.com/t/best-way-to-output-decoded-data-to-user/240454 "2014-04-16T13:57:01Z")
Hi, I’m trying to figure out the best way to print the decoded data information of packets (received through gnuradio) to the user. File outputs are not really user friendly so I’m thinking of using a message queue o… --- ## [Catching unrecognized exception](https://www.ruby-forum.com/t/catching-unrecognized-exception/239523)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 10\ **Last updated:** [April 16, 2014, 11:56am UTC](https://www.ruby-forum.com/t/catching-unrecognized-exception/239523 "2014-04-16T11:56:36Z")
Hi all guys, I have a block which is responsible to receive certain messages from other blocks and to write the data from the message into database. Sometimes the following exception occures and the block stops writ… --- ## [Gr-drm for GNU Radio 3.7 available](https://www.ruby-forum.com/t/gr-drm-for-gnu-radio-3-7-available/238468)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [April 16, 2014, 11:47am UTC](https://www.ruby-forum.com/t/gr-drm-for-gnu-radio-3-7-available/238468 "2014-04-16T11:47:44Z")
Hi all, I just want to make a quick announcement: gr-drm is now available for GNU Radio 3.7! Go and check it out under GitHub - kit-cel/gr-drm: DRM transmitter using GNU Radio! I also added a commit tag if you want … --- ## [Re: Best way to output decoded data to user](https://www.ruby-forum.com/t/re-best-way-to-output-decoded-data-to-user/240465)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 6\ **Last updated:** [April 15, 2014, 6:23pm UTC](https://www.ruby-forum.com/t/re-best-way-to-output-decoded-data-to-user/240465 "2014-04-15T18:23:27Z")
On Tue, Apr 15, 2014 at 4:35 PM, Martin B. removed\_email\_address@domain.invalidwrote: On 04/15/2014 06:14 AM, Francois Gervais wrote: I’m trying to figure out the best way to print the decoded data information of p… --- ## [Question about Lte receiver in gnuradio‏](https://www.ruby-forum.com/t/question-about-lte-receiver-in-gnuradio/240467)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [April 15, 2014, 5:03pm UTC](https://www.ruby-forum.com/t/question-about-lte-receiver-in-gnuradio/240467 "2014-04-15T17:03:11Z")
My names is Amado. I am student of master of science in the Mexico City. My investigation is about the physical layer of LTE. I revised the work of lte in gnuradio wich is excellent. I have a question about IQ base… --- ## [Issue while installing gr-ieee802.15.4](https://www.ruby-forum.com/t/issue-while-installing-gr-ieee802-15-4/240466)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [April 15, 2014, 4:18pm UTC](https://www.ruby-forum.com/t/issue-while-installing-gr-ieee802-15-4/240466 "2014-04-15T16:18:16Z")
Hello GR, I was trying to install gr-ieee802.15.4 Before everything was ok then once I got this error at CMake: CMake Error at ~/gnuradio-3.7\_install/lib64/cmake/gnuradio/GnuradioConfig.cmake:29 (list): list sub-co… --- ## [Noisy source block](https://www.ruby-forum.com/t/noisy-source-block/240453)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 2\ **Last updated:** [April 15, 2014, 12:06pm UTC](https://www.ruby-forum.com/t/noisy-source-block/240453 "2014-04-15T12:06:55Z")
higuys why the unit of amplitude in Noisy source block is volt? how to explain this ? thanks, BZS --- ## [Error while installing a new version of GNURadion on USRP e110](https://www.ruby-forum.com/t/error-while-installing-a-new-version-of-gnuradion-on-usrp-e110/240458)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [April 15, 2014, 11:04am UTC](https://www.ruby-forum.com/t/error-while-installing-a-new-version-of-gnuradion-on-usrp-e110/240458 "2014-04-15T11:04:58Z")
Hi, I removed the old version of the GNURadio installed on the USRP e110,I followed instructions on the FAQ forum in order to install a new version of it.everything seemed all right at the beginning but suddenly an e… --- ## [GRC vs python flow-graph by hand](https://www.ruby-forum.com/t/grc-vs-python-flow-graph-by-hand/240410)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 6\ **Last updated:** [April 15, 2014, 6:21am UTC](https://www.ruby-forum.com/t/grc-vs-python-flow-graph-by-hand/240410 "2014-04-15T06:21:15Z")
Dear Sir, As an amateur I use GRC to create flow-graphs, but I see many other users create their flow-graphs in python by hand. In what kind of cases the flow graphs must be coded by hand ? (where GRC couldn’t accom… --- ## [Freq Xlating FIR Filter Question](https://www.ruby-forum.com/t/freq-xlating-fir-filter-question/240445)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [April 14, 2014, 11:05pm UTC](https://www.ruby-forum.com/t/freq-xlating-fir-filter-question/240445 "2014-04-14T23:05:29Z")
When using a Freq. Xlating FIR filter with decimation and taps both set to 1, what determines the practical lower limit for the resolution of the freq change? @(^.^)@ Ed --- ## [Decoding FSK modulated signal](https://www.ruby-forum.com/t/decoding-fsk-modulated-signal/240439)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 2\ **Last updated:** [April 14, 2014, 9:01pm UTC](https://www.ruby-forum.com/t/decoding-fsk-modulated-signal/240439 "2014-04-14T21:01:00Z")
Hey, I’ve some home automation equipment here using the sub-ghz band that I managed to capture with a RTL dongle. From the data sheet and the register settings of the TI CC1100 transceiver chip that is used inside th… --- ## [Re: GR Windows install](https://www.ruby-forum.com/t/re-gr-windows-install/240444)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [April 14, 2014, 8:21pm UTC](https://www.ruby-forum.com/t/re-gr-windows-install/240444 "2014-04-14T20:21:29Z")
If you manage to get this working OP, I’d love to see how.I’d love to run a full GNURadio system in Windows, I just never had any luck with it. --- ## [How To Print Elements of Vector Tags?](https://www.ruby-forum.com/t/how-to-print-elements-of-vector-tags/240408)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 3\ **Last updated:** [April 14, 2014, 4:08pm UTC](https://www.ruby-forum.com/t/how-to-print-elements-of-vector-tags/240408 "2014-04-14T16:08:14Z")
Hi, I’m new to gnuradio and want to do some wireless communication experiments with it. I runned OFDM examples(rx\_ofdm.grc & tx\_ofdm.grc) and tried to use the tag debug block to retrieve the CIR information generate… --- ## [How many multiple/simultaneous PLLs can I have running on USRP2?](https://www.ruby-forum.com/t/how-many-multiple-simultaneous-plls-can-i-have-running-on-usrp2/228820)
**Author:** [@LD\_Zhang](https://www.ruby-forum.com/u/LD_Zhang)\ **Replies:** 12\ **Last updated:** [April 14, 2014, 2:26pm UTC](https://www.ruby-forum.com/t/how-many-multiple-simultaneous-plls-can-i-have-running-on-usrp2/228820 "2014-04-14T14:26:41Z")
Dear Community, I have a question: I want to run multiple (as many as possible) PLLs that track the phase of multiple carriers in my band using the USRP N210. How many can I have running in real time simultaneously? … --- ## [GR Windows install](https://www.ruby-forum.com/t/gr-windows-install/240427)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [April 14, 2014, 9:01am UTC](https://www.ruby-forum.com/t/gr-windows-install/240427 "2014-04-14T09:01:45Z")
I am planning to use the Ettus guide to install GR 3.7. One question, is it possible to compile OOT modules with this installation? --- ## [Using python scripts in GNURadio blocks?](https://www.ruby-forum.com/t/using-python-scripts-in-gnuradio-blocks/240426)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [April 14, 2014, 9:01am UTC](https://www.ruby-forum.com/t/using-python-scripts-in-gnuradio-blocks/240426 "2014-04-14T09:01:10Z")
I have a flow graph where I’d like to run ffmpeg/avconv, and tscbrmux as blocks. Is there a way to use FFMPEG and other scripts as GRC blocks? --- ## [Receiving 900MHz signal on USRP1](https://www.ruby-forum.com/t/receiving-900mhz-signal-on-usrp1/240423)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [April 13, 2014, 1:40pm UTC](https://www.ruby-forum.com/t/receiving-900mhz-signal-on-usrp1/240423 "2014-04-13T13:40:18Z")
Hi I am new to gnuradio. I have done installation of uhd and gnuradio form buildgnuradio script successfully. Now I want to receive 900MHz signal from USRP1. when i run uhd\_fft… it does not give any significant resul… --- ## [Code::Blocks](https://www.ruby-forum.com/t/code-blocks/240415)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 6\ **Last updated:** [April 13, 2014, 9:44am UTC](https://www.ruby-forum.com/t/code-blocks/240415 "2014-04-13T09:44:56Z")
Greetings everybody, I have been using Code::Blocks IDE for a while. And I have tried to link GnuRadio in Code:Blocks, but I have not found any “.so” file in Ubuntu, although I have searched via terminal with the com… --- ## [Understanding c++ code](https://www.ruby-forum.com/t/understanding-c-code/240409)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 4\ **Last updated:** [April 13, 2014, 8:29am UTC](https://www.ruby-forum.com/t/understanding-c-code/240409 "2014-04-13T08:29:26Z")
I installed GNU RADIO from this link http://blogs.bu.edu/mhirsch/2012/07/installing-gnu-radio-in-ubuntu-12-04-x64/comment-page-1/ I want to test some blocks & see their output to understand them more and more. for e… --- ## [Undefined reference to 'pthread\_sigmask' error when make](https://www.ruby-forum.com/t/undefined-reference-to-pthread-sigmask-error-when-make/240344)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 2\ **Last updated:** [April 13, 2014, 4:58am UTC](https://www.ruby-forum.com/t/undefined-reference-to-pthread-sigmask-error-when-make/240344 "2014-04-13T04:58:49Z")
Hi, I am trying to build gnuradio from source in Ubuntu 12.04. http://jenkins.gnuradio.org/builds/gnuradio-current.tar.gz and 3.7.3 release: Index of /releases/gnuradio/ are tried, but both encounter: \[ 33%\] Genera… --- ## [Socket PDU: Host not found (authoritative)](https://www.ruby-forum.com/t/socket-pdu-host-not-found-authoritative/240411)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 4\ **Last updated:** [April 12, 2014, 7:25pm UTC](https://www.ruby-forum.com/t/socket-pdu-host-not-found-authoritative/240411 "2014-04-12T19:25:46Z")
Discuss-gnuradio mailing list removed\_email\_address@domain.invalid https://lists.gnu.org/mailman/listinfo/discuss-gnuradio --- ## [Where to start in learning to develop and contribute to GNU Radio?](https://www.ruby-forum.com/t/where-to-start-in-learning-to-develop-and-contribute-to-gnu-radio/240406)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 2\ **Last updated:** [April 12, 2014, 3:29pm UTC](https://www.ruby-forum.com/t/where-to-start-in-learning-to-develop-and-contribute-to-gnu-radio/240406 "2014-04-12T15:29:11Z")
I recently graduated with my degree in Computer Engineering, and the GNU Radio project is by far the most complex thing I’ve desired to work on. I’m looking for tips on how to get started learning GNU Radio from the … --- ## [Resampling, filters, and CPU Usage](https://www.ruby-forum.com/t/resampling-filters-and-cpu-usage/240405)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [April 12, 2014, 5:24am UTC](https://www.ruby-forum.com/t/resampling-filters-and-cpu-usage/240405 "2014-04-12T05:24:58Z")
As most of you likely have seen, I’ve been working on a flowhraph for quite some time. Using gr-drm and an external FM processor, I have made a sort of open alternative to HD Radio…because fun. Anyway, the DRM signa… --- ## [Ofdm snr](https://www.ruby-forum.com/t/ofdm-snr/240162)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 2\ **Last updated:** [April 12, 2014, 5:02am UTC](https://www.ruby-forum.com/t/ofdm-snr/240162 "2014-04-12T05:02:32Z")
Hi all, I am trying to estimate SNR in OFDM system using USRP 2. I am using two URSP’s (XVCR 2450). To do that I am using Gnu radio 3.7.2 with slightly modify OFDM\_benchmark\_receiver (see img Rx\_snr) and transmitter (… --- ## [Ctrlport-monitor: radio.get threw exception (math domain error)](https://www.ruby-forum.com/t/ctrlport-monitor-radio-get-threw-exception-math-domain-error/240087)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 2\ **Last updated:** [April 11, 2014, 10:28pm UTC](https://www.ruby-forum.com/t/ctrlport-monitor-radio-get-threw-exception-math-domain-error/240087 "2014-04-11T22:28:50Z")
I get the following error when trying to the run gr-perf-monitorx against a flow graph that has an RTL\_SDR radio as the source. I recompiled both rtl\_sdr and gr\_osmosdr after enabling performance counters in gnuradio. … --- ## [ASK demodulation help](https://www.ruby-forum.com/t/ask-demodulation-help/240366)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 10\ **Last updated:** [April 11, 2014, 7:59pm UTC](https://www.ruby-forum.com/t/ask-demodulation-help/240366 "2014-04-11T19:59:31Z")
Hi, I’m new to gnu radio and I’m trying to demodulate a 125kpbs ASK signal from a device I have, as a first project. I’m using RTL-SDR as the input device. I’m slowly getting there. I receive the signal, at 2Msample… --- ## [New GRC behavior request for comment](https://www.ruby-forum.com/t/new-grc-behavior-request-for-comment/240381)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 8\ **Last updated:** [April 11, 2014, 2:55pm UTC](https://www.ruby-forum.com/t/new-grc-behavior-request-for-comment/240381 "2014-04-11T14:55:01Z")
In my latest push to the master branch, I’ve added a feature update from Sebastian Koslowksi for GRC. Previously, every change to an edit box in a GRC Properties box would cause GRC to reevaluate the entire applicatio… --- ## [How To Print Elements of Vector Tags?](https://www.ruby-forum.com/t/how-to-print-elements-of-vector-tags/240388)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [April 11, 2014, 8:44am UTC](https://www.ruby-forum.com/t/how-to-print-elements-of-vector-tags/240388 "2014-04-11T08:44:39Z")
Hi, I’m new to gnuradio and want to do some wireless communication experiments with it. I played with OFDM examples (rx\_ofdm.grc & tx\_ofdm.grc) and tried to use the TAG DEBUG block to retrieve the CFR information gen… --- ## [Swig error with add\_item\_tag](https://www.ruby-forum.com/t/swig-error-with-add-item-tag/240364)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 3\ **Last updated:** [April 11, 2014, 1:06am UTC](https://www.ruby-forum.com/t/swig-error-with-add-item-tag/240364 "2014-04-11T01:06:31Z")
Hello, I am working with some code from Jared B. who did some work with gnuradio looking at Tire Pressure Sensor Modules (tpms). See the repo here: GitHub - jboone/tpms: Tire Pressure Monitoring System decoding tools… --- ## [Re the spectrum estimation toolbox](https://www.ruby-forum.com/t/re-the-spectrum-estimation-toolbox/240368)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 2\ **Last updated:** [April 10, 2014, 9:17pm UTC](https://www.ruby-forum.com/t/re-the-spectrum-estimation-toolbox/240368 "2014-04-10T21:17:00Z")
Hello GR, I have multiple questions re the gr-specest toolbox: 1/ Is there any MTM estimator block for GRC 2/ Can anyone explain to me the figures in https://www.cgran.org/wiki/SpecEst related to Cyclostationarity-Ba… [Previous page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=77) [Next page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=79)