# GNU Radio **URL:** https://www.ruby-forum.com/c/gnu-radio/15.md?page=82 [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:** 83 --- ## [Looping with work() function](https://www.ruby-forum.com/t/looping-with-work-function/239701)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 11\ **Last updated:** [March 25, 2014, 10:12pm UTC](https://www.ruby-forum.com/t/looping-with-work-function/239701 "2014-03-25T22:12:36Z")
Hello I am executing a flowgraph where I pass different parameters to the work() function of my block in every iteration. I would like my flowgraph to execute once with a certain set of parameters and on satisfying… --- ## [Pad block in ieee802\_15\_4\_mac block](https://www.ruby-forum.com/t/pad-block-in-ieee802-15-4-mac-block/240018)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 5\ **Last updated:** [March 25, 2014, 9:14pm UTC](https://www.ruby-forum.com/t/pad-block-in-ieee802-15-4-mac-block/240018 "2014-03-25T21:14:41Z")
Hello GR, How can I have a file source connected as a pad source to an hierarchical block ? More precisely, I have for example the hierarchical block ieee802\_15\_4\_mac, and instead of feeding the block in input with… --- ## [Is a bug about stream\_mux block?](https://www.ruby-forum.com/t/is-a-bug-about-stream-mux-block/240045)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [March 25, 2014, 4:19pm UTC](https://www.ruby-forum.com/t/is-a-bug-about-stream-mux-block/240045 "2014-03-25T16:19:13Z")
Hi Experts, As follow is my program to test stream\_mux block. I found when dat1\_num+dat2\_num \> 8192, the result is wrong. Is there something I have made a mistake? My gnuradio version is v3.7.4git-35-g1092e685 #!/us… --- ## [Gnuradio blocks](https://www.ruby-forum.com/t/gnuradio-blocks/240041)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [March 25, 2014, 2:07pm UTC](https://www.ruby-forum.com/t/gnuradio-blocks/240041 "2014-03-25T14:07:34Z")
Hello, Sorry to trouble you again. I’m having enough doubt to use gnuradio for what I want. The following happens: I need to know which block gnuradio the “back” signal to audio. Can anyone help me? Thanks and Regar… --- ## [GSoC 2014 Signal Visualization and Analysis](https://www.ruby-forum.com/t/gsoc-2014-signal-visualization-and-analysis/240020)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [March 25, 2014, 12:37pm UTC](https://www.ruby-forum.com/t/gsoc-2014-signal-visualization-and-analysis/240020 "2014-03-25T12:37:27Z")
I have to adjust my summer workload as my school has just made changes to its course offerings this summer. My new course load is going to be prohibitively time consuming and I will not be able to take part in GSoC so… --- ## [Re: TX characterisation of USRPN210 with SBX daughterboard](https://www.ruby-forum.com/t/re-tx-characterisation-of-usrpn210-with-sbx-daughterboard/240019)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 2\ **Last updated:** [March 25, 2014, 12:35pm UTC](https://www.ruby-forum.com/t/re-tx-characterisation-of-usrpn210-with-sbx-daughterboard/240019 "2014-03-25T12:35:42Z")
Hi Ron Sorry about that. Please find attached the modified graph. The two curves seems more consistent in this graph. I am assuming the DAC should have reached saturation at Ampl =1. However my reading don’t seem to… --- ## [TX characterisation of USRPN210 with SBX daughterboard](https://www.ruby-forum.com/t/tx-characterisation-of-usrpn210-with-sbx-daughterboard/239997)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 4\ **Last updated:** [March 25, 2014, 12:32pm UTC](https://www.ruby-forum.com/t/tx-characterisation-of-usrpn210-with-sbx-daughterboard/239997 "2014-03-25T12:32:11Z")
Hi, I am trying to characterize the TX and RX characteristics of USRPN210 with a SBX board. I have tried one test : Amplitude Variation effects, by varying the amplitude in steps and finding out the o/p power throug… --- ## [GSoC 14 proposal on MIMO transceiver](https://www.ruby-forum.com/t/gsoc-14-proposal-on-mimo-transceiver/240038)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [March 25, 2014, 10:18am UTC](https://www.ruby-forum.com/t/gsoc-14-proposal-on-mimo-transceiver/240038 "2014-03-25T10:18:48Z")
I have submitted a proposal for GSoC’14 for MIMO transceiver implementation. It is made public and can be found at link: http://www.google-melange.com http://www.google-melange.com/gsoc/proposal/public/google/gsoc2014… --- ## [Gr-lte updated to GNU Radio 3.7 API](https://www.ruby-forum.com/t/gr-lte-updated-to-gnu-radio-3-7-api/238063)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 34\ **Last updated:** [March 25, 2014, 9:48am UTC](https://www.ruby-forum.com/t/gr-lte-updated-to-gnu-radio-3-7-api/238063 "2014-03-25T09:48:09Z")
Hello GNU Radio enthusiasts, some time after the GNU Radio 3.7 release I started to move the code for ‘gr-lte’ to the new API. Besides moving it to the new API, I wanted to clean up code and rework a lot of tests. Thu… --- ## [How to check that HRPT receiver is working](https://www.ruby-forum.com/t/how-to-check-that-hrpt-receiver-is-working/239983)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [March 25, 2014, 6:34am UTC](https://www.ruby-forum.com/t/how-to-check-that-hrpt-receiver-is-working/239983 "2014-03-25T06:34:10Z")
Hello, I am working with the HRPT receivers files included in gr-noaa and I dont understand how them work because several blocks are created and use different parameters that are not explained so Id appreciate your h… --- ## [D-Star DD (ham radio dataystem) anyone?](https://www.ruby-forum.com/t/d-star-dd-ham-radio-dataystem-anyone/240034)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [March 25, 2014, 5:59am UTC](https://www.ruby-forum.com/t/d-star-dd-ham-radio-dataystem-anyone/240034 "2014-03-25T05:59:03Z")
Hi, I wonder if the ham radio data protocol D-Star DD has already been done with gnuradio? This is some wireless ham radio Ethernet at 1.2 GHz, see for example Error 404 - Page Cannot Be Found. The Icom radios go ou… --- ## [AM Stereo TX? (Motorola C-QUAM)](https://www.ruby-forum.com/t/am-stereo-tx-motorola-c-quam/240021)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 2\ **Last updated:** [March 25, 2014, 2:34am UTC](https://www.ruby-forum.com/t/am-stereo-tx-motorola-c-quam/240021 "2014-03-25T02:34:15Z")
I have been Googling a good deal and have not come up with much. I have done numerous projects with GNURadio, but while I can throw together a wideband AM transmitter, I cannot figure out the stereo portion. Based on … --- ## [State of the art research](https://www.ruby-forum.com/t/state-of-the-art-research/240013)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [March 25, 2014, 1:03am UTC](https://www.ruby-forum.com/t/state-of-the-art-research/240013 "2014-03-25T01:03:43Z")
Hello all I have been trying to discover what is currently available in terms of open source, working out-of-the box, modules implemented in GNU Radio and the USRP, to use as a teaching aid with students. I am inter… --- ## [Pad block in ieee802\_15\_4\_mac block](https://www.ruby-forum.com/t/pad-block-in-ieee802-15-4-mac-block/240017)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [March 24, 2014, 10:14pm UTC](https://www.ruby-forum.com/t/pad-block-in-ieee802-15-4-mac-block/240017 "2014-03-24T22:14:05Z")
Hello GR, How can I have a file source connected as a pad source to an hierarchical block ? More precisely, I have for example the hierarchical block ieee802\_15\_4\_mac, and instead of feeding the block in input with… --- ## [Listen to ports issue using GNU Radio](https://www.ruby-forum.com/t/listen-to-ports-issue-using-gnu-radio/240010)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [March 24, 2014, 3:35pm UTC](https://www.ruby-forum.com/t/listen-to-ports-issue-using-gnu-radio/240010 "2014-03-24T15:35:39Z")
Hello GR, I have an issue capturing a word that I broadcast from transceiver A to transceiver B. I use GR 3.65 with two usrp N210 on a Centos machine. Whenever I run transceiverA and transceiverB scripts on the same … --- ## [UHD build apparently failed](https://www.ruby-forum.com/t/uhd-build-apparently-failed/239972)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 12\ **Last updated:** [March 24, 2014, 8:55am UTC](https://www.ruby-forum.com/t/uhd-build-apparently-failed/239972 "2014-03-24T08:55:59Z")
As I am installing GNU Radio from this link: http://blogs.bu.edu/mhirsch/2012/07/installing-gnu-radio-in-ubuntu-12-04-x64/comment-page-1/ (which installs GNU Radio & UHD ) I got the following error , what can i do ? T… --- ## [Accessing gr\_uhd\_usrp\_source/sink methods](https://www.ruby-forum.com/t/accessing-gr-uhd-usrp-source-sink-methods/239959)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 2\ **Last updated:** [March 23, 2014, 6:49pm UTC](https://www.ruby-forum.com/t/accessing-gr-uhd-usrp-source-sink-methods/239959 "2014-03-23T18:49:01Z")
Hello GR, Is there a possibility I can have a pointer into my C++ coding to access let’s say gr\_uhd\_usrp\_source or \_sink methods and call them from inside my class. How can I do that ? Regards, Ruecan – View thi… --- ## [Full-duplex](https://www.ruby-forum.com/t/full-duplex/239980)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 4\ **Last updated:** [March 23, 2014, 6:47pm UTC](https://www.ruby-forum.com/t/full-duplex/239980 "2014-03-23T18:47:51Z")
I want to use 2 Laptops with GNU Radio installed & 2 USRPs , but I want a full duplex OFDM link so each USRP will work as a TX & RX . How to do a Full-duplex traffic ? will I need to make a new block on GNU Radio to… --- ## [Problem with "TCP Source" module in the client mode](https://www.ruby-forum.com/t/problem-with-tcp-source-module-in-the-client-mode/239530)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 3\ **Last updated:** [March 23, 2014, 6:11pm UTC](https://www.ruby-forum.com/t/problem-with-tcp-source-module-in-the-client-mode/239530 "2014-03-23T18:11:38Z")
Hi all! I am trying to build following simple scheme: Signal source --\> TCP Sink (server mode) \<---- TCP Source (client mode) –\> GUI Scope Sink It’s strange but this simple scheme isn’t working. sockstat shows me: … --- ## [Gqrx segfaults: rtlsdr\_read\_async returned with -5](https://www.ruby-forum.com/t/gqrx-segfaults-rtlsdr-read-async-returned-with-5/239964)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 10\ **Last updated:** [March 23, 2014, 2:27pm UTC](https://www.ruby-forum.com/t/gqrx-segfaults-rtlsdr-read-async-returned-with-5/239964 "2014-03-23T14:27:21Z")
I have updated my gnuradio installation via pybombs today. Gqrx is no longer working with my RTL-SDR dongle. The gui loads, but the moment when I start the receiver it works for about a second and then it crashes with… --- ## [Wxgui issue with Windows version of GR-companion](https://www.ruby-forum.com/t/wxgui-issue-with-windows-version-of-gr-companion/246282)
**Author:** [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\ **Replies:** 3\ **Last updated:** [March 22, 2014, 9:57am UTC](https://www.ruby-forum.com/t/wxgui-issue-with-windows-version-of-gr-companion/246282 "2014-03-22T09:57:17Z")
Hello, I have managed to install gnuradio on a Win 8 and Win 7 machine and it seems like most of the block components in gnuradio-companion function correctly, except for the WX elements. When I include a WX block, l… --- ## [GSoC 2014 Proposal: Improve PyBOMBS](https://www.ruby-forum.com/t/gsoc-2014-proposal-improve-pybombs/239960)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [March 22, 2014, 4:54am UTC](https://www.ruby-forum.com/t/gsoc-2014-proposal-improve-pybombs/239960 "2014-03-22T04:54:11Z")
Hi all, Sorry to introduce so late, but I want to share my GSoC 2014 proposal about improving PyBOMBS. It is available on Github \[1\], and I mentioned the link in Google Melange. I was busy with several urgent tasks an… --- ## [GSoC 2014 project "Wireless Networks In-the-Loop" and "Channel Sounder"](https://www.ruby-forum.com/t/gsoc-2014-project-wireless-networks-in-the-loop-and-channel-sounder/239532)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 7\ **Last updated:** [March 22, 2014, 4:13am UTC](https://www.ruby-forum.com/t/gsoc-2014-project-wireless-networks-in-the-loop-and-channel-sounder/239532 "2014-03-22T04:13:18Z")
Hi everyone, My name is Achuth PV, first year Master of Technology student in Communication and Signal Processing, Indian Institute of Technology, Bombay, India. I am really interested to work in the GSoC project “W… --- ## [Fwd: Proposal for GSoC on gr-gsm](https://www.ruby-forum.com/t/fwd-proposal-for-gsoc-on-gr-gsm/239709)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 7\ **Last updated:** [March 21, 2014, 4:18pm UTC](https://www.ruby-forum.com/t/fwd-proposal-for-gsoc-on-gr-gsm/239709 "2014-03-21T16:18:08Z")
\---------- Forwarded message ---------- From: zhenhua han removed\_email\_address@domain.invalid Date: 2014-03-11 16:00 GMT+08:00 Subject: Re: \[Discuss-gnuradio\] Proposal for GSoC on gr-gsm To: Bogdan D. removed\_email\_… --- ## [FFTW3 error in GNURADIO](https://www.ruby-forum.com/t/fftw3-error-in-gnuradio/239952)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 8\ **Last updated:** [March 21, 2014, 12:18pm UTC](https://www.ruby-forum.com/t/fftw3-error-in-gnuradio/239952 "2014-03-21T12:18:33Z")
Hi all, I am using ubuntu 13.04 and GNURADIO 3.7. In project GitHub - BogdanDIA/gr-dvbt: DVB-T implementation in gnuradio , in reference\_signals\_impl.cc in /lib, I add inside one of the functions: fftw\_complex in2, o… --- ## [Recording time](https://www.ruby-forum.com/t/recording-time/239953)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [March 21, 2014, 11:33am UTC](https://www.ruby-forum.com/t/recording-time/239953 "2014-03-21T11:33:39Z")
hi I’m using the first time GNURadio Companion together with an USRP2 by EttusResearch. I would like to set a recording time of 10ms for the file sink. How can I do that? Is it possible to do it with UHD blocks? Tha… --- ## [GSOC 2014 project proposal?](https://www.ruby-forum.com/t/gsoc-2014-project-proposal/239682)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 4\ **Last updated:** [March 21, 2014, 11:14am UTC](https://www.ruby-forum.com/t/gsoc-2014-project-proposal/239682 "2014-03-21T11:14:44Z")
Hello: I wrote to the maillist a previous email with no response. I re-send it in case the team does not have the chance to check it. I would be very thankfull if the team would let me know if GNU Radio is interested… --- ## [Writing Blocks - Problem with I/O Count](https://www.ruby-forum.com/t/writing-blocks-problem-with-i-o-count/239946)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [March 21, 2014, 6:28am UTC](https://www.ruby-forum.com/t/writing-blocks-problem-with-i-o-count/239946 "2014-03-21T06:28:00Z")
I’m writing a (allegedly simple) block to frame incoming bytes with a 3-byte header, and append to them a one-byte CRC. One input port, one output port. Problem is, my sent message will look something like “testtestte… --- ## [Update to GSoC Poposal, Signal Analysis and Visualization Tool](https://www.ruby-forum.com/t/update-to-gsoc-poposal-signal-analysis-and-visualization-tool/239942)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [March 20, 2014, 11:42pm UTC](https://www.ruby-forum.com/t/update-to-gsoc-poposal-signal-analysis-and-visualization-tool/239942 "2014-03-20T23:42:26Z")
I got some good comments and feedback on my GSoC proposal. I updated it and it is available here: Thanks, Dean --- ## [UHD blocks](https://www.ruby-forum.com/t/uhd-blocks/239939)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 2\ **Last updated:** [March 20, 2014, 9:07pm UTC](https://www.ruby-forum.com/t/uhd-blocks/239939 "2014-03-20T21:07:40Z")
My friend has installed GNU Radio from this link http://blogs.bu.edu/mhirsch/2012/07/installing-gnu-radio-in-ubuntu-12-04-x64/comment-page-1/ Then when running GNURadio , she found UHD blocks in it . 1- Does this mea… [Previous page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=81) [Next page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=83)