# GNU Radio **URL:** https://www.ruby-forum.com/c/gnu-radio/15.md?page=56 [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:** 57 --- ## [Re: Hilbert transform](https://www.ruby-forum.com/t/re-hilbert-transform/231589)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [August 18, 2014, 6:03pm UTC](https://www.ruby-forum.com/t/re-hilbert-transform/231589 "2014-08-18T18:03:37Z")
Thanx Marcus and Tom fr ur explanations. I will read further and ask any questions if i have. --- ## [Pulse and FMCW waveform on Software defined radio](https://www.ruby-forum.com/t/pulse-and-fmcw-waveform-on-software-defined-radio/231599)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [August 18, 2014, 4:11pm UTC](https://www.ruby-forum.com/t/pulse-and-fmcw-waveform-on-software-defined-radio/231599 "2014-08-18T16:11:04Z")
Hi all, I am using GNU Radio trying to design radar waveforms, particularly Pulse and FMCW waveform. does anyone know how I can go about doing it? Thank you. --- ## [Control loop in GNURadio](https://www.ruby-forum.com/t/control-loop-in-gnuradio/231596)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [August 18, 2014, 1:23pm UTC](https://www.ruby-forum.com/t/control-loop-in-gnuradio/231596 "2014-08-18T13:23:03Z")
Hello, I need to implement some control loops as GNURadio blocks, I had a look at the code base and I found the gr::blocks::control\_loop class which, despite his name is specialized for phase lock loops. Am I missing … --- ## [Fcdproplus (Funcube Pro Plus) Module?](https://www.ruby-forum.com/t/fcdproplus-funcube-pro-plus-module/231592)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [August 18, 2014, 1:58am UTC](https://www.ruby-forum.com/t/fcdproplus-funcube-pro-plus-module/231592 "2014-08-18T01:58:46Z")
Greetings, My platform is the Mint 13 distribution of Linux which is based on Ubuntu 12.04. I have been struggling with gnuradio trying to get it to work with my FuncubeProPlus dongle for which I have installed the… --- ## [GRCon14 Not Actually Sold Out \[Yet\]](https://www.ruby-forum.com/t/grcon14-not-actually-sold-out-yet/231590)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [August 17, 2014, 8:59pm UTC](https://www.ruby-forum.com/t/grcon14-not-actually-sold-out-yet/231590 "2014-08-17T20:59:31Z")
Greetings list, I’ve received a couple emails today from people that were unable to register from the conference because it was “Sold Out”. The fact that we have a two separate parts to register for (Intro Day and D… --- ## [Hilbert transform](https://www.ruby-forum.com/t/hilbert-transform/231587)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [August 17, 2014, 5:57pm UTC](https://www.ruby-forum.com/t/hilbert-transform/231587 "2014-08-17T17:57:15Z")
Hi, I have made a simple flowgraph as attached.I have on query that when i observe the signal coming out of the ‘Hilbert transform’ block using a time sink then its imaginary part is shown to be zero.According to the … --- ## [Question about root\_raised\_cosine](https://www.ruby-forum.com/t/question-about-root-raised-cosine/231579)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [August 16, 2014, 6:42pm UTC](https://www.ruby-forum.com/t/question-about-root-raised-cosine/231579 "2014-08-16T18:42:58Z")
I use a variable to create the taps for arbitrary polyphase resampler block, and for that the variable that I call “taps1” I give the following value firdes.root\_raised\_cosine(gain, sampling\_freq, symbol\_rate, alpha… --- ## [Qam modulation -](https://www.ruby-forum.com/t/qam-modulation/231578)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [August 16, 2014, 6:20pm UTC](https://www.ruby-forum.com/t/qam-modulation/231578 "2014-08-16T18:20:56Z")
Hi all, I’m trying to make a qam modulation where you can choose different ways to constellation using constellation\_calcdist, and that part works fine (within limitations), but at runtime some blocks do not take the … --- ## [GNU Radio flow graph for Spectrum sensing](https://www.ruby-forum.com/t/gnu-radio-flow-graph-for-spectrum-sensing/231496)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 5\ **Last updated:** [August 16, 2014, 1:55am UTC](https://www.ruby-forum.com/t/gnu-radio-flow-graph-for-spectrum-sensing/231496 "2014-08-16T01:55:39Z")
Hi guys, I’m trying to configure a spectrum analyzer with GNU Radio and I had a many problems. I tried a lot of ways to do it but all of them failed. More specifically, I need to get information about the FFT and sto… --- ## [The GNU Radio Shop is open!](https://www.ruby-forum.com/t/the-gnu-radio-shop-is-open/231559)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 6\ **Last updated:** [August 15, 2014, 11:20pm UTC](https://www.ruby-forum.com/t/the-gnu-radio-shop-is-open/231559 "2014-08-15T23:20:17Z")
Hey everyone, We’re really excited to now be able to offer all of our great GNU Radio merchandise to everyone! Many of you have maybe seen us sporting the shirts and hoodies at FOSDEM and other events for the past fe… --- ## [European Workshop on Testbed-Based Wireless Research - Call for Contributions](https://www.ruby-forum.com/t/european-workshop-on-testbed-based-wireless-research-call-for-contributions/231561)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [August 15, 2014, 4:36pm UTC](https://www.ruby-forum.com/t/european-workshop-on-testbed-based-wireless-research-call-for-contributions/231561 "2014-08-15T16:36:17Z")
European Workshop on Testbed-Based Wireless Research November 19th 2014 KTH Main Campus, Stockholm, Sweden web: European workshop on testbed based wireless research Following up on the successful “Scandinavian worksh… --- ## [Hier block I/O's](https://www.ruby-forum.com/t/hier-block-i-os/239163)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 3\ **Last updated:** [August 15, 2014, 4:35pm UTC](https://www.ruby-forum.com/t/hier-block-i-os/239163 "2014-08-15T16:35:05Z")
When including a hier block in a custom Python application, is there any way to retrieve a reference to the pad source/sink with it’s label? --- ## [RDS for AM?](https://www.ruby-forum.com/t/rds-for-am/231550)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [August 15, 2014, 2:27am UTC](https://www.ruby-forum.com/t/rds-for-am/231550 "2014-08-15T02:27:39Z")
I finished work on a C-QUAM (AM Stereo) transmitter, and now want to add something similar to RDS, but not sure how to go about it. I am aware of AMSS, but I like my wideband audio signal, and think that using the sub… --- ## [Received Signal Power](https://www.ruby-forum.com/t/received-signal-power/231543)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [August 14, 2014, 10:18pm UTC](https://www.ruby-forum.com/t/received-signal-power/231543 "2014-08-14T22:18:14Z")
Hello, I have transmitted and received signal using USRP board. I can see the received power spectral density by using WX GUI FFT Sink. How can I find the received power of a signal? I mean I don’t require power spect… --- ## [Blocks.complex\_to\_arg() implementation](https://www.ruby-forum.com/t/blocks-complex-to-arg-implementation/231529)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 5\ **Last updated:** [August 14, 2014, 5:32pm UTC](https://www.ruby-forum.com/t/blocks-complex-to-arg-implementation/231529 "2014-08-14T17:32:45Z")
Hello, I haven’t checked if it is true for the code currently in git (some network problems here, I cannot access the repository), but in GNURadio 3.7.2 the complex\_to\_arg() block is implemented with an atan2() functi… --- ## [Ctest freezes in random moments on my OOT](https://www.ruby-forum.com/t/ctest-freezes-in-random-moments-on-my-oot/231541)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [August 14, 2014, 5:07pm UTC](https://www.ruby-forum.com/t/ctest-freezes-in-random-moments-on-my-oot/231541 "2014-08-14T17:07:06Z")
Hello, I’ve written a simple block that takes a c34vector message as input and outputs a message containing average mag^2 of the samples in the vector. I’ve added the QA code in Python and it seems to be working excep… --- ## [Fftw3 thread safety?](https://www.ruby-forum.com/t/fftw3-thread-safety/231530)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [August 14, 2014, 12:53pm UTC](https://www.ruby-forum.com/t/fftw3-thread-safety/231530 "2014-08-14T12:53:49Z")
I am facing an issue with one of my decoding blocks in which I call “manually” FFTW3 (ie not going through the gnuradio-fftw3 implementation since I have not (yet) understood how it operates). If I call a processing c… --- ## [Cmake don't found portaudio](https://www.ruby-forum.com/t/cmake-dont-found-portaudio/230892)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [August 14, 2014, 12:04am UTC](https://www.ruby-forum.com/t/cmake-dont-found-portaudio/230892 "2014-08-14T00:04:35Z")
Hi, I’m installing version 3.7.3 on Ubuntu 14.04. Cmake output: . . . – Configuring gr-audio support… – Dependency Boost\_FOUND = 1 – Dependency ENABLE\_GNURADIO\_RUNTIME = ON – Enabling gr-audio support. – … --- ## [GNU Radio Python execution from C++](https://www.ruby-forum.com/t/gnu-radio-python-execution-from-c/231527)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [August 13, 2014, 7:08pm UTC](https://www.ruby-forum.com/t/gnu-radio-python-execution-from-c/231527 "2014-08-13T19:08:22Z")
I want to start up and control GNU Radio top\_block.py from a C++ class I have written. My thought was to execlp() python on the top\_block.py file. I run into a problem because I do not have a good way to kill GNU Radi… --- ## [Buffer size](https://www.ruby-forum.com/t/buffer-size/231526)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [August 13, 2014, 2:12pm UTC](https://www.ruby-forum.com/t/buffer-size/231526 "2014-08-13T14:12:41Z")
Hi I ran OFDM transmitter in the grc example using 1024 point fft. following error was raised after running the grc. Please help to get out of this error… thread\[thread-per-block\[7\]: \\]: … --- ## [Failed to create xml files](https://www.ruby-forum.com/t/failed-to-create-xml-files/231480)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 3\ **Last updated:** [August 13, 2014, 12:07pm UTC](https://www.ruby-forum.com/t/failed-to-create-xml-files/231480 "2014-08-13T12:07:55Z")
Hi all, I am building an OOT module. When I run gr\_modtool makexml beacon\_gen, I got error: GNU Radio module name identified: PNC Warning: This is an experimental feature. Don’t expect any magic. Searching for match… --- ## [Test for sync block without inputs doesn´t stop](https://www.ruby-forum.com/t/test-for-sync-block-without-inputs-doesn-t-stop/231524)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [August 13, 2014, 11:26am UTC](https://www.ruby-forum.com/t/test-for-sync-block-without-inputs-doesn-t-stop/231524 "2014-08-13T11:26:30Z")
Hello! I’m trying to make a test for a GNUradio sync block without inputs. When I run the python qa-test it doesn’t stop, it just loops forever. When I add an input to the block (change the io-signature and xml-file) … --- ## [Benchmark files](https://www.ruby-forum.com/t/benchmark-files/231516)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [August 13, 2014, 6:12am UTC](https://www.ruby-forum.com/t/benchmark-files/231516 "2014-08-13T06:12:01Z")
I would like to know the best way to test the benchmark\_tx.py and benchmark\_rx.py files. These files are located in the /usr/share/gnuradio/examples/digital/ofdm directory. My goal is to transmit a jpg file from one … --- ## [Benchmark files](https://www.ruby-forum.com/t/benchmark-files/231517)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [August 13, 2014, 5:19am UTC](https://www.ruby-forum.com/t/benchmark-files/231517 "2014-08-13T05:19:34Z")
I would like to know the best way to test the benchmark\_tx.py and benchmark\_rx.py files. These files are located in the /usr/share/gnuradio/examples/digital/ofdm directory. My goal is to transmit a jpg file from one … --- ## [Make Error for OOT Module](https://www.ruby-forum.com/t/make-error-for-oot-module/231509)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [August 13, 2014, 3:55am UTC](https://www.ruby-forum.com/t/make-error-for-oot-module/231509 "2014-08-13T03:55:22Z")
I’m taking my old spectrum sensing module and moving it over to 3.7.4. My strategy is to create a new block and copy and relevant code over while making sure nothing old that doesn’t conform to 3.7.4 is left out. This … --- ## [\[coproc\] Notes from WG call](https://www.ruby-forum.com/t/coproc-notes-from-wg-call/231511)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [August 13, 2014, 1:11am UTC](https://www.ruby-forum.com/t/coproc-notes-from-wg-call/231511 "2014-08-13T01:11:53Z")
I just wanted to let folks know that I’ve posted some initial notes from the WG call on the gnuradio.org wiki: http://gnuradio.org/redmine/projects/gnuradio/wiki/Call20140812 There isn’t a lot of information there, bu… --- ## [New GR Tutorials Posted](https://www.ruby-forum.com/t/new-gr-tutorials-posted/231494)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 8\ **Last updated:** [August 12, 2014, 11:31pm UTC](https://www.ruby-forum.com/t/new-gr-tutorials-posted/231494 "2014-08-12T23:31:51Z")
Hi everyone, I would like to invite you all to check out and beta test our new GNU Radio Tutorials: http://gnuradio.org/redmine/projects/gnuradio/wiki/Guided\_Tutorials This was a good community effort to put this to… --- ## [Setup process for B210 with GNURadio -- device detection issue](https://www.ruby-forum.com/t/setup-process-for-b210-with-gnuradio-device-detection-issue/231507)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [August 12, 2014, 8:04pm UTC](https://www.ruby-forum.com/t/setup-process-for-b210-with-gnuradio-device-detection-issue/231507 "2014-08-12T20:04:55Z")
Greetings to the group This is another connection issue for the B210, however I think it somewhat unique having tried the solutions provided for other users, although I am a newbie so it could be something very obviou… --- ## [Problems building GNURadio](https://www.ruby-forum.com/t/problems-building-gnuradio/231497)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [August 12, 2014, 3:37pm UTC](https://www.ruby-forum.com/t/problems-building-gnuradio/231497 "2014-08-12T15:37:38Z")
Hi: I am having problems building gnuradio on armV7 that I cannot figure out. I am using pybombs. Here is a snapshot of the errors during the build: Built target pygen\_gr\_vocoder\_examples\_6232c \[ 23%\] Built target … --- ## [Clarification](https://www.ruby-forum.com/t/clarification/231436)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 9\ **Last updated:** [August 12, 2014, 2:43am UTC](https://www.ruby-forum.com/t/clarification/231436 "2014-08-12T02:43:18Z")
I still have the problem with the AttributeError: ‘module’ object has no attribute problem for my OOT module. Really clutching at straws now, hair all gone. Can anyone explain in plain English what the following advic… [Previous page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=55) [Next page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=57)