# GNU Radio **URL:** https://www.ruby-forum.com/c/gnu-radio/15.md?page=25 [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:** 26 --- ## [Dependee is newer than depender gr-3.7.7 verbose build (harmless?)](https://www.ruby-forum.com/t/dependee-is-newer-than-depender-gr-3-7-7-verbose-build-harmless/241669)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [April 24, 2015, 3:21am UTC](https://www.ruby-forum.com/t/dependee-is-newer-than-depender-gr-3-7-7-verbose-build-harmless/241669 "2015-04-24T03:21:45Z")
Greetings These messages appeared when running “make V=1 VERBOSE=1” on a checkout of v3.7.7 in ubuntu 14.04 x86\_64. The build ran OK - not sure how serious it is; I’m posting in case anyone finds it interesting… Be… --- ## [Delay Block for Tags?](https://www.ruby-forum.com/t/delay-block-for-tags/241693)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [April 24, 2015, 2:59am UTC](https://www.ruby-forum.com/t/delay-block-for-tags/241693 "2015-04-24T02:59:27Z")
Hi all, I need to delay a tag in my stream only, not the sample it is attached to. I’m looking for the equivalent of a delay block, but for tags. Does anyone know of a way of doing this in grc? v/r, Rich --- ## [Re: CMake and CUDA](https://www.ruby-forum.com/t/re-cmake-and-cuda/241639)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 2\ **Last updated:** [April 23, 2015, 11:42pm UTC](https://www.ruby-forum.com/t/re-cmake-and-cuda/241639 "2015-04-23T23:42:41Z")
I try to give more details. In order to create blocks using the standard way(cmake/make/install) with Cuda,I’ve modified the CMakeList in /lib as shown before. My block is created using gr\_modtool and the language is… --- ## [How do I use the Gnuradio GRC XML RPC client or server components?](https://www.ruby-forum.com/t/how-do-i-use-the-gnuradio-grc-xml-rpc-client-or-server-components/241675)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [April 23, 2015, 5:05am UTC](https://www.ruby-forum.com/t/how-do-i-use-the-gnuradio-grc-xml-rpc-client-or-server-components/241675 "2015-04-23T05:05:15Z")
How do I use the Gnuradio GRC XML RPC client or server components? Please understand, I know nothing about networking, client, server, rpc, marshaling, sockets, Python and all newer programming environments. However; … --- ## [Re: Some misconceptions about the "peak\_detector2" block](https://www.ruby-forum.com/t/re-some-misconceptions-about-the-peak-detector2-block/241637)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 3\ **Last updated:** [April 22, 2015, 6:06pm UTC](https://www.ruby-forum.com/t/re-some-misconceptions-about-the-peak-detector2-block/241637 "2015-04-22T18:06:28Z")
Ive also been looking for an appropriate fix for peak\_detector2. When I review this thread and the issue tracker, Im uncertain how the block is supposed to behave. I think most of the developers have looked at the d… --- ## [2nd IEEE Signal Intelligence Challenge](https://www.ruby-forum.com/t/2nd-ieee-signal-intelligence-challenge/241665)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [April 22, 2015, 9:26am UTC](https://www.ruby-forum.com/t/2nd-ieee-signal-intelligence-challenge/241665 "2015-04-22T09:26:52Z")
Hi all, on behalf of the IEEE Student Branch Karlsruhe \[0\], I’m happy to announce the 2nd IEEE Signal Intelligence Challenge (ISIC) which is organized in cooperation with the Secure Mobile Networking Lab (Seemoo) at … --- ## [Correlation Estimator](https://www.ruby-forum.com/t/correlation-estimator/241662)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 2\ **Last updated:** [April 21, 2015, 10:35pm UTC](https://www.ruby-forum.com/t/correlation-estimator/241662 "2015-04-21T22:35:51Z")
Was the Correlation Estimator block recently added? If so, thank you whoever wrote it. If not, thanks anyway. It seems to be an alternative to the infamous Corr\_and\_Sync block. I also like the testbench that goes wit… --- ## [Streams are not aligned properly in wx time sink](https://www.ruby-forum.com/t/streams-are-not-aligned-properly-in-wx-time-sink/241617)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 4\ **Last updated:** [April 21, 2015, 5:04pm UTC](https://www.ruby-forum.com/t/streams-are-not-aligned-properly-in-wx-time-sink/241617 "2015-04-21T17:04:34Z")
Hi all, I have an example where I see the output of three blocks in a wx time sink: http://web.eecs.umich.edu/~anastas/docs/wx.png I didn’t get the expected result and I run in also with qt time sink: http://web.eec… --- ## [Bitbaking GnuRadio with meta-sdr master issues](https://www.ruby-forum.com/t/bitbaking-gnuradio-with-meta-sdr-master-issues/241619)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 7\ **Last updated:** [April 21, 2015, 4:27pm UTC](https://www.ruby-forum.com/t/bitbaking-gnuradio-with-meta-sdr-master-issues/241619 "2015-04-21T16:27:45Z")
Hello, I have built the gnuradio-dev-image for an arm machine and I wanted to share a couple of small issues that I found in the process. The meta-sdr/conf/bblayers.conf.sample doesn’t include all the layers needed… --- ## [How to receive message from subblock using topblock?](https://www.ruby-forum.com/t/how-to-receive-message-from-subblock-using-topblock/241648)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 2\ **Last updated:** [April 21, 2015, 4:14pm UTC](https://www.ruby-forum.com/t/how-to-receive-message-from-subblock-using-topblock/241648 "2015-04-21T16:14:59Z")
Hi, I’m newbie with PMT and I created a block was inherited from gr::sync\_block and sent out messages. Could you tell me how to receive messages from my block on topblock to process them, please? With best regards, … --- ## [GNURadio scheduler](https://www.ruby-forum.com/t/gnuradio-scheduler/241652)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [April 21, 2015, 12:47pm UTC](https://www.ruby-forum.com/t/gnuradio-scheduler/241652 "2015-04-21T12:47:45Z")
Is there a sample routine, document or youtube video explaining the GNUradio scheduler? hard to fully understand Gnuradio without it. What are the files in the Gnuradio that are the core of the scheduler? thanks, --- ## [Measure the peak of FFT and its frequency](https://www.ruby-forum.com/t/measure-the-peak-of-fft-and-its-frequency/241647)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [April 21, 2015, 5:50am UTC](https://www.ruby-forum.com/t/measure-the-peak-of-fft-and-its-frequency/241647 "2015-04-21T05:50:13Z")
hi, Im trying to find the frequency Offset between 2 USRPs then transmit my signal with compensating the Offset. From the forum I found out I can do this by transmit a cosinus signal and measure the peak and its freq… --- ## [Looking for gnuradio coding style template](https://www.ruby-forum.com/t/looking-for-gnuradio-coding-style-template/241645)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 2\ **Last updated:** [April 21, 2015, 5:37am UTC](https://www.ruby-forum.com/t/looking-for-gnuradio-coding-style-template/241645 "2015-04-21T05:37:03Z")
Could someone point me to the right place? Thanks, --- ## [RSS measurement in time domain](https://www.ruby-forum.com/t/rss-measurement-in-time-domain/241646)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [April 21, 2015, 5:15am UTC](https://www.ruby-forum.com/t/rss-measurement-in-time-domain/241646 "2015-04-21T05:15:01Z")
I want to measure channel gain between rx-tx pair for a TDD system.( first slot between A to B second slot between B to A with self switching of USRP). Any suggested example to follow? Any reference design? Packet b… --- ## [Announcing NEWSDR at WPI on Thr/Fri May 21/22](https://www.ruby-forum.com/t/announcing-newsdr-at-wpi-on-thr-fri-may-21-22/241644)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [April 21, 2015, 5:04am UTC](https://www.ruby-forum.com/t/announcing-newsdr-at-wpi-on-thr-fri-may-21-22/241644 "2015-04-21T05:04:02Z")
NEWSDR 2015 \* \* New England Workshop on Software-Defined Radio \* … --- ## [Bidirectional communication between attached blocks](https://www.ruby-forum.com/t/bidirectional-communication-between-attached-blocks/241621)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 7\ **Last updated:** [April 20, 2015, 9:37pm UTC](https://www.ruby-forum.com/t/bidirectional-communication-between-attached-blocks/241621 "2015-04-20T21:37:29Z")
Hi all, I’d like to establish a bidirectional communication between two attached blocks, without asking the user to write code like msg\_connect(). One way could be: the upstream block generate an id like ID=typeBlo… --- ## [New UHD seems to break a lot](https://www.ruby-forum.com/t/new-uhd-seems-to-break-a-lot/241564)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 13\ **Last updated:** [April 20, 2015, 9:29pm UTC](https://www.ruby-forum.com/t/new-uhd-seems-to-break-a-lot/241564 "2015-04-20T21:29:20Z")
Hi, Not only OpenBTS is affected, also gr-dvbt/t2 do not work any more with latest uhd. A quick check during lunch break showed, the produced output is not decodable any more. I will take a closer look this evening a… --- ## [Error 127](https://www.ruby-forum.com/t/error-127/241636)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [April 20, 2015, 7:05pm UTC](https://www.ruby-forum.com/t/error-127/241636 "2015-04-20T19:05:33Z")
my system is cubieboard sdr is usrp1 my os is Distributor ID: Ubuntu Description: Ubuntu 12.04.4 LTS Release: 12.04 Codename: precise kernel is Linux Qbee-X 3.4.79-sun7i+ #39 SMP PREEMPT Wed Feb 12 19:20:27 EST … --- ## [Gr-display-master install (was Re: Writing text to a QT GUI Window)](https://www.ruby-forum.com/t/gr-display-master-install-was-re-writing-text-to-a-qt-gui-window/241634)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 5\ **Last updated:** [April 20, 2015, 5:53pm UTC](https://www.ruby-forum.com/t/gr-display-master-install-was-re-writing-text-to-a-qt-gui-window/241634 "2015-04-20T17:53:17Z")
In the gr-display-master README file under “2. Installation” when it states… $cmake -DCMAKE\_INSTALL\_PREFIX= …/ What is meant by “”? gnuradio gets installed across many directories, to which does this refer? Sorry f… --- ## [Interfacing a software radio to gnu radio companion](https://www.ruby-forum.com/t/interfacing-a-software-radio-to-gnu-radio-companion/241632)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [April 20, 2015, 5:00pm UTC](https://www.ruby-forum.com/t/interfacing-a-software-radio-to-gnu-radio-companion/241632 "2015-04-20T17:00:45Z")
Is there some documentation on how to build a module to support a new software radio generating samples into gnu radio? Thanks, Y- --- ## [Re: Message Strobe Block Stopping Unexpectedly](https://www.ruby-forum.com/t/re-message-strobe-block-stopping-unexpectedly/241631)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [April 20, 2015, 4:25pm UTC](https://www.ruby-forum.com/t/re-message-strobe-block-stopping-unexpectedly/241631 "2015-04-20T16:25:21Z")
Thanks Marcus, that did the trick. Thank you also for the explanation, helpful to understand what GR is doing behind the scenes. -Travis --- ## [Status of GNU Radio 3.7.7](https://www.ruby-forum.com/t/status-of-gnu-radio-3-7-7/241623)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [April 19, 2015, 8:32pm UTC](https://www.ruby-forum.com/t/status-of-gnu-radio-3-7-7/241623 "2015-04-19T20:32:29Z")
Hello, What is the status of latest release 3.7.7 of GNU Radio? Can it be considered stable? There were no release anouncements published on main webpage since 3.7.5.1 and “Source Download Instructions” webpage point… --- ## [CMake and CUDA](https://www.ruby-forum.com/t/cmake-and-cuda/241620)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [April 19, 2015, 5:48pm UTC](https://www.ruby-forum.com/t/cmake-and-cuda/241620 "2015-04-19T17:48:43Z")
Hi all, I’m playing with CUDA and GNURadio. For the moment I’ve used separatly nvcc in order to compile device code: I’ve tried different tutorials which explain how to use CUDA with CMake, but I was not able to obta… --- ## [Gr-nacl: OOT module for data encryption using NaCl](https://www.ruby-forum.com/t/gr-nacl-oot-module-for-data-encryption-using-nacl/241605)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [April 19, 2015, 5:38pm UTC](https://www.ruby-forum.com/t/gr-nacl-oot-module-for-data-encryption-using-nacl/241605 "2015-04-19T17:38:47Z")
Hi! I want to present you a OOT module which provides the functionality of the NaCl crypto library for GNU Radio. The NaCl library is a well known library written by Daniel J. Bernstein, Tanja Lange and Peter Schwabe … --- ## [Message Strobe Block Stopping Unexpectedly](https://www.ruby-forum.com/t/message-strobe-block-stopping-unexpectedly/241609)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [April 19, 2015, 11:06am UTC](https://www.ruby-forum.com/t/message-strobe-block-stopping-unexpectedly/241609 "2015-04-19T11:06:17Z")
I’m having a problem with the Message Strobe block. I have a simple flowgraph, which can be found here: \\\ **Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 8\ **Last updated:** [April 19, 2015, 12:34am UTC](https://www.ruby-forum.com/t/trouble-with-installation-via-pybombs-on-ubuntu-14-04-2-lts/241579 "2015-04-19T00:34:30Z") Not a big fan of asking for help with something as mundane as this, but… Simply ran out of ‘grunt’ from my Core2Duo MacBook Pro - pretty damn quick - and have thus migrated across to an old Core2Quad that was lying a… --- ## [Re: Input items vs Output items](https://www.ruby-forum.com/t/re-input-items-vs-output-items/241604)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [April 18, 2015, 8:23pm UTC](https://www.ruby-forum.com/t/re-input-items-vs-output-items/241604 "2015-04-18T20:23:27Z")
Thanks for the HDLC tip. A neat bit of code. I have not worked with message ports before. I have looked at the examples and managed to get PDUs displayed in the console as hex dumps using the debug block, but how can … --- ## [Input items vs Output items](https://www.ruby-forum.com/t/input-items-vs-output-items/241602)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 3\ **Last updated:** [April 18, 2015, 6:45pm UTC](https://www.ruby-forum.com/t/input-items-vs-output-items/241602 "2015-04-18T18:45:36Z")
I am slightly confused with the way you implement a general work function - here is my AX25 decoder which takes in bits and outputs decoded packets in text format as a stream of 8 bit integers. This was based on the g… --- ## [Input items vs Output items](https://www.ruby-forum.com/t/input-items-vs-output-items/241601)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [April 18, 2015, 5:18pm UTC](https://www.ruby-forum.com/t/input-items-vs-output-items/241601 "2015-04-18T17:18:40Z")
Hi Marcus Thanks for the quick answer. I didn’t know about nitems\_written(0) but I did wonder why the system didn’t already know. It’s been a while since I used GDB but I will have a go. I don’t quite understand - wh… --- ## [Writing text to a QT Gui Window](https://www.ruby-forum.com/t/writing-text-to-a-qt-gui-window/241599)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [April 18, 2015, 12:48pm UTC](https://www.ruby-forum.com/t/writing-text-to-a-qt-gui-window/241599 "2015-04-18T12:48:41Z")
I am wondering how I might write stuff to a gui window from my OOT blocks rather than to the console. I don’t see anything in the standard blocks a gui text sink for example. I assume I will need to write something … [Previous page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=24) [Next page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=26)