# GNU Radio **URL:** https://www.ruby-forum.com/c/gnu-radio/15.md?page=49 [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:** 50 --- ## [MySQL?](https://www.ruby-forum.com/t/mysql/232506)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [October 13, 2014, 7:03pm UTC](https://www.ruby-forum.com/t/mysql/232506 "2014-10-13T19:03:38Z")
Dear All, Has anyone tried using MySQL from GNU Radio? I am just posting some simple stuff to a MySQL database that runs fine in a stand-alone C program. It builds fine in GNU Radio, by including \, but there … --- ## [Transmit time synchronization](https://www.ruby-forum.com/t/transmit-time-synchronization/232504)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 3\ **Last updated:** [October 13, 2014, 6:08pm UTC](https://www.ruby-forum.com/t/transmit-time-synchronization/232504 "2014-10-13T18:08:52Z")
Hello all, I am trying to implement a multi-relay cooperative network using gnuradio and USRP B200. I cannot figure out how to synchronize the relay transmissions using GNU-Radio (without editing FPGA code or using … --- ## [FOSDEM '15 -- Call for Participation](https://www.ruby-forum.com/t/fosdem-15-call-for-participation/232508)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [October 13, 2014, 5:17pm UTC](https://www.ruby-forum.com/t/fosdem-15-call-for-participation/232508 "2014-10-13T17:17:42Z")
Dear friends and colleagues, next year’s FOSDEM (the free and open source developer’s meeting in Brussels, Europe) will, once again, feature a track on Software Defined Radio. Therefore, we invite developers and use… --- ## [Missing Links - Re: Successful installation of GNURadio 3.6.4.1 on Window XP and Windows 8](https://www.ruby-forum.com/t/missing-links-re-successful-installation-of-gnuradio-3-6-4-1-on-window-xp-and-windows-8/232505)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [October 13, 2014, 4:56pm UTC](https://www.ruby-forum.com/t/missing-links-re-successful-installation-of-gnuradio-3-6-4-1-on-window-xp-and-windows-8/232505 "2014-10-13T16:56:14Z")
I can’t find “PyQwt-5.2.1-py2.7-x32-pyqt4.9.6-numpy1.7.1” or “PyOpenGL-3.1.0a1.win32-py2.7” from the listed sources. I tried google searches with no success so far. Several other links didn’t work, but I was able to f… --- ## [FEC gnuradio 3.7.6 error](https://www.ruby-forum.com/t/fec-gnuradio-3-7-6-error/232431)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [October 13, 2014, 8:17am UTC](https://www.ruby-forum.com/t/fec-gnuradio-3-7-6-error/232431 "2014-10-13T08:17:25Z")
Discuss-gnuradio mailing list removed\_email\_address@domain.invalid https://lists.gnu.org/mailman/listinfo/discuss-gnuradio --- ## [Connecting an output to multiple input](https://www.ruby-forum.com/t/connecting-an-output-to-multiple-input/232491)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [October 12, 2014, 10:32pm UTC](https://www.ruby-forum.com/t/connecting-an-output-to-multiple-input/232491 "2014-10-12T22:32:53Z")
Hello GNURadioers! I have a block (blck #1) connected to multiple of blocks. Here I have two blocks’ (call blck #2 and blck #3) connected to blck #1 output. I’m confused when I saw nitems\_read of blck #2 and #3 aren’… --- ## [Why is fft output complex?](https://www.ruby-forum.com/t/why-is-fft-output-complex/232479)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 3\ **Last updated:** [October 12, 2014, 4:48pm UTC](https://www.ruby-forum.com/t/why-is-fft-output-complex/232479 "2014-10-12T16:48:18Z")
Discuss-gnuradio mailing list removed\_email\_address@domain.invalid https://lists.gnu.org/mailman/listinfo/discuss-gnuradio --- ## [Question on how to derive a class in an out-of-tree module based on a gnuradio class](https://www.ruby-forum.com/t/question-on-how-to-derive-a-class-in-an-out-of-tree-module-based-on-a-gnuradio-class/232388)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 7\ **Last updated:** [October 12, 2014, 4:34pm UTC](https://www.ruby-forum.com/t/question-on-how-to-derive-a-class-in-an-out-of-tree-module-based-on-a-gnuradio-class/232388 "2014-10-12T16:34:52Z")
Dear all, I’m trying to derive a packet\_header2 class in my own OOT module based on gr::digital::packet\_header\_default. I followed the way in packet\_heade\_ofdm of gr-digital and made packet\_header2.h and packet\_hea… --- ## [Re: A BERT Block with Offset Compensation](https://www.ruby-forum.com/t/re-a-bert-block-with-offset-compensation/232490)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [October 12, 2014, 2:34pm UTC](https://www.ruby-forum.com/t/re-a-bert-block-with-offset-compensation/232490 "2014-10-12T14:34:34Z")
Discuss-gnuradio mailing list removed\_email\_address@domain.invalid https://lists.gnu.org/mailman/listinfo/discuss-gnuradio --- ## [Re: Why is fft output complex?](https://www.ruby-forum.com/t/re-why-is-fft-output-complex/232483)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [October 12, 2014, 3:40am UTC](https://www.ruby-forum.com/t/re-why-is-fft-output-complex/232483 "2014-10-12T03:40:26Z")
Discuss-gnuradio mailing list removed\_email\_address@domain.invalid https://lists.gnu.org/mailman/listinfo/discuss-gnuradio --- ## [Gnuradio DCS Module](https://www.ruby-forum.com/t/gnuradio-dcs-module/232409)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 3\ **Last updated:** [October 11, 2014, 2:15pm UTC](https://www.ruby-forum.com/t/gnuradio-dcs-module/232409 "2014-10-11T14:15:04Z")
Hi list, I am pretty new to Gnuradio / SDR, experimenting with a HackRF. As a startup experiment, I wanted to communicate with simple handheld radio devices (toy radios). These radios used DCS, and in order for my co… --- ## [Re: \[SOLVED\] Clock Recovery MM](https://www.ruby-forum.com/t/re-solved-clock-recovery-mm/232234)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 3\ **Last updated:** [October 11, 2014, 2:05pm UTC](https://www.ruby-forum.com/t/re-solved-clock-recovery-mm/232234 "2014-10-11T14:05:44Z")
On Tue, Sep 9, 2014 at 3:21 PM, Bastian B. removed\_email\_address@domain.invalid wrote: Here it looks like absolute line one more time to verify that it’s doing that properly. But yes, it’s Bastian Just to follow… --- ## [Where can i find blocks for matrix operations? could somebody please help?](https://www.ruby-forum.com/t/where-can-i-find-blocks-for-matrix-operations-could-somebody-please-help/232474)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [October 11, 2014, 2:04pm UTC](https://www.ruby-forum.com/t/where-can-i-find-blocks-for-matrix-operations-could-somebody-please-help/232474 "2014-10-11T14:04:25Z")
i am working on least square channel estimation . is it possible to have matrix blocks in GRC ? like a 2x2 matrix multiplication . --- ## [Packet Encoder-Decoder](https://www.ruby-forum.com/t/packet-encoder-decoder/232393)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 6\ **Last updated:** [October 10, 2014, 10:00pm UTC](https://www.ruby-forum.com/t/packet-encoder-decoder/232393 "2014-10-10T22:00:19Z")
Hi, In the followning basic setup: File Source (Byte) ----\> Packet Encoder (Byte) -----\> File Sink (byte) My input file is just a “Hello World” message If the Repeat property of my file source is set to “No” the File… --- ## [Sub-classing a block defined in an \_impl class](https://www.ruby-forum.com/t/sub-classing-a-block-defined-in-an-impl-class/232461)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 9\ **Last updated:** [October 10, 2014, 4:55pm UTC](https://www.ruby-forum.com/t/sub-classing-a-block-defined-in-an-impl-class/232461 "2014-10-10T16:55:27Z")
Hello, this question my arise from my ignorance about C++, but I don’t understand how, if it is possible, to sub-class a GNURadio block that has moat of his code in an \_impl class. To my understanding I would need to… --- ## [LTE record data in gr-lte](https://www.ruby-forum.com/t/lte-record-data-in-gr-lte/232437)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 3\ **Last updated:** [October 10, 2014, 2:12pm UTC](https://www.ruby-forum.com/t/lte-record-data-in-gr-lte/232437 "2014-10-10T14:12:28Z")
Hi Johannes, Could you share the LTE record data that you used in gr-lte? Thanks Tiankun --- ## [Installing gnuradio with pybombs on debian](https://www.ruby-forum.com/t/installing-gnuradio-with-pybombs-on-debian/232438)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [October 10, 2014, 1:40pm UTC](https://www.ruby-forum.com/t/installing-gnuradio-with-pybombs-on-debian/232438 "2014-10-10T13:40:21Z")
Hello guys, I have a problem with installing GNURadio on Debian i86 7.6. After executing “./pybombs install gnuradio”, I got the following error related to boost: " File “/home/alizadeh/gnuradio\_src/pybombs/mod\_pyb… --- ## [Pi/4 Mod-Demod](https://www.ruby-forum.com/t/pi-4-mod-demod/232460)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [October 10, 2014, 12:16pm UTC](https://www.ruby-forum.com/t/pi-4-mod-demod/232460 "2014-10-10T12:16:50Z")
All, I’m interested in, and looking into the Pi/4 QPSK modulation technique (Phase-shift keying - Wikipedia). Has anyone worked on this before and does anyone have any blocks or code that I could use for reference wh… --- ## [Two USRPs with MIMO cable - rx\_multi\_samples](https://www.ruby-forum.com/t/two-usrps-with-mimo-cable-rx-multi-samples/232459)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [October 10, 2014, 9:22am UTC](https://www.ruby-forum.com/t/two-usrps-with-mimo-cable-rx-multi-samples/232459 "2014-10-10T09:22:16Z")
Dear all I’m trying to get samples from two USRP2s connected via MIMO cable and the Gigabit ethernet cable is connected with the PC with only one USRP2. What I couldn’t figure out is only one of the USRP2s getting the… --- ## [Looking for 802.11 MAC & PHY Package](https://www.ruby-forum.com/t/looking-for-802-11-mac-phy-package/232446)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [October 9, 2014, 10:06pm UTC](https://www.ruby-forum.com/t/looking-for-802-11-mac-phy-package/232446 "2014-10-09T22:06:26Z")
Dear Marcus and all, Many thanks for the advice regarding the Hydra and ORBIT project. Actually I’m looking for the open-source 802.11 PHY&MAC packages which are compatible with Recent GNU Radio and USRP N210/X310. I… --- ## [Saving PMTs as Python Dictionaries to .Mat File](https://www.ruby-forum.com/t/saving-pmts-as-python-dictionaries-to-mat-file/232430)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [October 9, 2014, 8:38pm UTC](https://www.ruby-forum.com/t/saving-pmts-as-python-dictionaries-to-mat-file/232430 "2014-10-09T20:38:14Z")
I have a series of collected metadata files. I have taken both the gr\_read\_file\_metadata.py and parse\_file\_metadata.py scripts and hacked them to my own needs. What I would like to do is convert the PMT to python dic… --- ## [Some problem with my USRP N210](https://www.ruby-forum.com/t/some-problem-with-my-usrp-n210/232444)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 4\ **Last updated:** [October 9, 2014, 8:05pm UTC](https://www.ruby-forum.com/t/some-problem-with-my-usrp-n210/232444 "2014-10-09T20:05:31Z")
Hi everyone, I am a new user of GNU radio. I am trying to communicate between Tmote Sky sensor node and USRP N210. I use the Tmote Sky sensor node as transmitter to broadcast messages by flashing the example code in… --- ## [GNURadio Installation with Hydra](https://www.ruby-forum.com/t/gnuradio-installation-with-hydra/232418)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 3\ **Last updated:** [October 9, 2014, 7:04pm UTC](https://www.ruby-forum.com/t/gnuradio-installation-with-hydra/232418 "2014-10-09T19:04:12Z")
Dear all, I’m a beginner of GNURadio but I’m familiar with some basis of Linux when I use C++ & IT++. Currently I’m trying to test the Hydra-0.4 package for evaluation under the last ubuntu ver 14.04.1 32bit. During … --- ## [Using volk](https://www.ruby-forum.com/t/using-volk/232407)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 4\ **Last updated:** [October 9, 2014, 3:01pm UTC](https://www.ruby-forum.com/t/using-volk/232407 "2014-10-09T15:01:48Z")
Hello all, I wondered about volk. I want it to compute mean to peak value of a complex array. How could I do this? Besides, I really need to know is there any example of using volk? The code itself, doesn’t reflect… --- ## [Voice Communication with USRP through OFDM](https://www.ruby-forum.com/t/voice-communication-with-usrp-through-ofdm/232434)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [October 9, 2014, 11:40am UTC](https://www.ruby-forum.com/t/voice-communication-with-usrp-through-ofdm/232434 "2014-10-09T11:40:16Z")
Hello all, I want to make a test communication system with USRP for narrow band HF range voice transmission and reception. Also I am interested in using OFDM scheme for that. I need some guidance about what packages… --- ## [GRC 3.6 / 802.11 a/g test signal](https://www.ruby-forum.com/t/grc-3-6-802-11-a-g-test-signal/232326)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 19\ **Last updated:** [October 9, 2014, 11:28am UTC](https://www.ruby-forum.com/t/grc-3-6-802-11-a-g-test-signal/232326 "2014-10-09T11:28:00Z")
Greetings engi’s! I’m currently working on my masters (802.11 wlan receiver with MATLAB/USRPN210). After creating all the important stuff ie: -symbol finder -time synchronization -coarse and fine frequency compensat… --- ## [How to access UHD from within my own OOT block?](https://www.ruby-forum.com/t/how-to-access-uhd-from-within-my-own-oot-block/232415)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 4\ **Last updated:** [October 9, 2014, 10:17am UTC](https://www.ruby-forum.com/t/how-to-access-uhd-from-within-my-own-oot-block/232415 "2014-10-09T10:17:55Z")
Dear all, In the Companion GUI I use the UHD source- and sink-blocks, together with my own OOT blocks. Now I want to control the UHD blocks from within my own blocks, for example changing the center frequency. So in m… --- ## [CC encoder definition (variable\_cc\_encoder\_def)](https://www.ruby-forum.com/t/cc-encoder-definition-variable-cc-encoder-def/232398)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 4\ **Last updated:** [October 8, 2014, 5:13pm UTC](https://www.ruby-forum.com/t/cc-encoder-definition-variable-cc-encoder-def/232398 "2014-10-08T17:13:26Z")
Dear All, I am trying to get the latest gr-fec code running in an older version of GNU Radio. I know this sounds like a terrible idea, and I don’t expect any sympathy but there is a reason why we can’t upgrade to the … --- ## [Delay block controlled by input](https://www.ruby-forum.com/t/delay-block-controlled-by-input/232174)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 22\ **Last updated:** [October 8, 2014, 3:37pm UTC](https://www.ruby-forum.com/t/delay-block-controlled-by-input/232174 "2014-10-08T15:37:03Z")
Hello, I have modified GNURadio delay block. It is a controlled delay from an input at runtime. I would like to know your opinion; if the block is well designed. --- ## [Building with MSVC v16](https://www.ruby-forum.com/t/building-with-msvc-v16/232327)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [October 7, 2014, 8:39pm UTC](https://www.ruby-forum.com/t/building-with-msvc-v16/232327 "2014-10-07T20:39:14Z")
Hi list. I’ve managed to build Gr using MingW. Now trying the same using Visual C Express 2010 (cl 16), gives me some troubles. I’m just adding all my points here instead of multiple emails. ) reed-solomon/.\[ch\] need… [Previous page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=48) [Next page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=50)