# GNU Radio **URL:** https://www.ruby-forum.com/c/gnu-radio/15.md?page=83 [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:** 84 --- ## [Rx\_ofdm Does Not Work Past Synchronizer](https://www.ruby-forum.com/t/rx-ofdm-does-not-work-past-synchronizer/239897)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 7\ **Last updated:** [March 20, 2014, 7:47pm UTC](https://www.ruby-forum.com/t/rx-ofdm-does-not-work-past-synchronizer/239897 "2014-03-20T19:47:39Z")
So I have the stock python scripts (tx\_ofdm and rx\_ofdm) located in the gr-digital examples and put USRP sources and sinks in the appropriate spots. I left sampling alone (100K for TX, 3.2M for RX) and had the TX/RX … --- ## [No Dev Call this March](https://www.ruby-forum.com/t/no-dev-call-this-march/239938)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [March 20, 2014, 6:58pm UTC](https://www.ruby-forum.com/t/no-dev-call-this-march/239938 "2014-03-20T18:58:35Z")
Hi everyone, Sorry for the short notice, but there will be no Dev Call today. With the hackfest, WSR and the recent release, we’ve been discussing a lot of things all the time, and don’t really have important stuff … --- ## [Draft Proposal for MIMO Transceiver](https://www.ruby-forum.com/t/draft-proposal-for-mimo-transceiver/239937)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [March 20, 2014, 6:50pm UTC](https://www.ruby-forum.com/t/draft-proposal-for-mimo-transceiver/239937 "2014-03-20T18:50:25Z")
Hello, Below is the link for my proposal for GSoC 14. http://www.google-melange.com/gsoc/proposal/review/student/google/gsoc2014/kunalsankhe/5629499534213120 Please let me know your feedback on this. Thanks and regar… --- ## [VOLK - vector multiplication](https://www.ruby-forum.com/t/volk-vector-multiplication/239928)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 7\ **Last updated:** [March 20, 2014, 6:05pm UTC](https://www.ruby-forum.com/t/volk-vector-multiplication/239928 "2014-03-20T18:05:26Z")
Hi all, I am using ubuntu 13.04, GNUradio 3.7. I have a question related to VOLK library. When I create a vector, lets say: vector\ y1; Can I multiply this vector to another vector using VOLK? Is there a… --- ## [Maxtrix inverse](https://www.ruby-forum.com/t/maxtrix-inverse/239848)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 5\ **Last updated:** [March 20, 2014, 5:26pm UTC](https://www.ruby-forum.com/t/maxtrix-inverse/239848 "2014-03-20T17:26:18Z")
hi, when i deal data in my block,i want to scramble the positions symbol in a frame,and at receiver-end descramble these symbols,get correct the order,for this purpose,i need to compute the inverse of 64\*64 matrix… --- ## [\[GSoC\] proposal - VNA](https://www.ruby-forum.com/t/gsoc-proposal-vna/239936)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [March 20, 2014, 5:19pm UTC](https://www.ruby-forum.com/t/gsoc-proposal-vna/239936 "2014-03-20T17:19:17Z")
Hello Everyone, I am a first year PHd student from TU Budapest. I would like to participate in the GSoC 2014 in the Vector network analyzer project. I have uploaded my proposel to a public repository. Any comments a… --- ## [Uhd\_fft missing](https://www.ruby-forum.com/t/uhd-fft-missing/239836)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 9\ **Last updated:** [March 20, 2014, 5:04pm UTC](https://www.ruby-forum.com/t/uhd-fft-missing/239836 "2014-03-20T17:04:40Z")
Hello, Using gentoo linux I installed uhd and gnuradio with the commands “emerge uhd” and “emerge gnuradio”. According to http://gnuradio.org/redmine/projects/gnuradio/wiki/HowToUse: “GNU Radio comes with a large va… --- ## [\[GSoC\] Proposal for radar toolbox, Update](https://www.ruby-forum.com/t/gsoc-proposal-for-radar-toolbox-update/239934)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [March 20, 2014, 3:21pm UTC](https://www.ruby-forum.com/t/gsoc-proposal-for-radar-toolbox-update/239934 "2014-03-20T15:21:15Z")
Hi! Thanks a lot for the feedback on the mailings list and on Google Melange! I have integrated your suggestions in the actual proposal on github \[1\]. Comments are still welcome! I left a note on the Melange page as … --- ## [Re: uhd\_rx\_cfile: getting constant O-overflows using the USRP B200 with debian](https://www.ruby-forum.com/t/re-uhd-rx-cfile-getting-constant-o-overflows-using-the-usrp-b200-with-debian/239926)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [March 20, 2014, 2:30pm UTC](https://www.ruby-forum.com/t/re-uhd-rx-cfile-getting-constant-o-overflows-using-the-usrp-b200-with-debian/239926 "2014-03-20T14:30:59Z")
Hi Aditya, Thanks for your reply. Today I got the chance to measure the lower samplerates and here are the results: I measured the writingspeed on disk and the number of the "O"s for 1 minute runtime. Running X and i… --- ## [GSoC: 2 Items](https://www.ruby-forum.com/t/gsoc-2-items/239933)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [March 20, 2014, 2:00pm UTC](https://www.ruby-forum.com/t/gsoc-2-items/239933 "2014-03-20T14:00:01Z")
We have a great selection of GSoC’14 proposals coming in! Here are a couple quick reminders, primarily for GSoC students (but, everyone can benefit): Please note that the deadline for submitting your proposal to Go… --- ## [\[GSoC\] Proposal: Measurement Toolbox](https://www.ruby-forum.com/t/gsoc-proposal-measurement-toolbox/239930)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [March 20, 2014, 1:34pm UTC](https://www.ruby-forum.com/t/gsoc-proposal-measurement-toolbox/239930 "2014-03-20T13:34:19Z")
\-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello community, I’ve just pushed all changes to my GSoC proposal for a Measurement Toolbox. You can get the full PDF on or of course access the repository on GitHub … --- ## [(de)modulation problems gnuradio 3.7.3.also GRC FFT missing axis labels](https://www.ruby-forum.com/t/de-modulation-problems-gnuradio-3-7-3-also-grc-fft-missing-axis-labels/239867)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 4\ **Last updated:** [March 20, 2014, 4:31am UTC](https://www.ruby-forum.com/t/de-modulation-problems-gnuradio-3-7-3-also-grc-fft-missing-axis-labels/239867 "2014-03-20T04:31:09Z")
I successfully? installed gnuradio 3.7.3 from source on Ubuntu 12.04 using the gnuradio-build script, but am running into problems demodulating anything from a R820T based SDR. GRC runs fine, but when I attempt to exe… --- ## [Google Summer of Code 2014 applicant : Optimization with VOLK](https://www.ruby-forum.com/t/google-summer-of-code-2014-applicant-optimization-with-volk/239358)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 23\ **Last updated:** [March 19, 2014, 7:33pm UTC](https://www.ruby-forum.com/t/google-summer-of-code-2014-applicant-optimization-with-volk/239358 "2014-03-19T19:33:50Z")
Hello, I have completed a Bachelor’s degree in Electrical Engineering from IIT Bombay, India and will be joining a masters program in Computer Science in August. For the summer, I am interested in participating GSoC … --- ## [Ok, I'm lost](https://www.ruby-forum.com/t/ok-im-lost/239916)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [March 19, 2014, 7:23pm UTC](https://www.ruby-forum.com/t/ok-im-lost/239916 "2014-03-19T19:23:54Z")
I’m trying to use gnuradio with wsjt. To do that, I need to make the gr audio source and sink look like a soundcard to the wsjt program. One might think this is simple; it is not or at least apparently not. I’ve been … --- ## [GSoC proposal](https://www.ruby-forum.com/t/gsoc-proposal/239918)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [March 19, 2014, 7:19pm UTC](https://www.ruby-forum.com/t/gsoc-proposal/239918 "2014-03-19T19:19:13Z")
Hello Community, This is the link to my GSoC 2014 proposal. I am looking forward to feedbacks on the proposal. www.google-melange.com/gsoc/proposal/public/google/gsoc2014/chandan\_pradhan/5629499534213120 --- ## [Uhd\_rx\_cfile: getting constant O-overflows using the USRP B200 with debian](https://www.ruby-forum.com/t/uhd-rx-cfile-getting-constant-o-overflows-using-the-usrp-b200-with-debian/239910)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [March 19, 2014, 4:10pm UTC](https://www.ruby-forum.com/t/uhd-rx-cfile-getting-constant-o-overflows-using-the-usrp-b200-with-debian/239910 "2014-03-19T16:10:34Z")
Hi developers, I have a fresh gnu radio installed with pybombs for my usrp B200. It runs on a Lenovo X230 with debian testing x64. When I use uhd\_rx\_cfile i get constant “O”-overruns (output given below). The uhd-b… --- ## [Math library](https://www.ruby-forum.com/t/math-library/239905)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [March 19, 2014, 12:21pm UTC](https://www.ruby-forum.com/t/math-library/239905 "2014-03-19T12:21:37Z")
Hi, This is the first time I send email to GNURadio Mailing List. Very glad to exchange ideas to all members. Recently, I want to extract RSSI from USRP N210. Is there any system to extract RSSI,or I have to build sy… --- ## [Around empty subcarrier in 802.11n implementation](https://www.ruby-forum.com/t/around-empty-subcarrier-in-802-11n-implementation/236868)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 2\ **Last updated:** [March 19, 2014, 8:31am UTC](https://www.ruby-forum.com/t/around-empty-subcarrier-in-802-11n-implementation/236868 "2014-03-19T08:31:53Z")
Hi list, I’m using gnuradio 3.6.0 together with USRPs N210 for implementing OFDM 802.11 n communications, just SISO for the moment (in the future it would be MIMO). I have properly modified parameters such as FFT si… --- ## [Problem running FCD demo](https://www.ruby-forum.com/t/problem-running-fcd-demo/239902)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [March 19, 2014, 7:02am UTC](https://www.ruby-forum.com/t/problem-running-fcd-demo/239902 "2014-03-19T07:02:42Z")
I am trying to run the FCD nfm demo with the proplus module. This is using 3.7.3. Everything compiled and loaded fine. I am very tired and going to bed. I would really appreciate someone looking at this. Thanks in ad… --- ## [OFDM link simulation](https://www.ruby-forum.com/t/ofdm-link-simulation/239899)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [March 19, 2014, 3:12am UTC](https://www.ruby-forum.com/t/ofdm-link-simulation/239899 "2014-03-19T03:12:36Z")
I want to simulate an OFDM link to carry 214 bytes per Ethernet packet & implement it using 2 laptops running GNU & 2 USRPs. Each USRP is a TX & RX .(FULL-DUPLEX) I calculated all OFDM parameters needed. total BW=200… --- ## [GSoC Proposal, Signal Analysis and Visualization tool](https://www.ruby-forum.com/t/gsoc-proposal-signal-analysis-and-visualization-tool/239901)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [March 19, 2014, 2:56am UTC](https://www.ruby-forum.com/t/gsoc-proposal-signal-analysis-and-visualization-tool/239901 "2014-03-19T02:56:50Z")
My Name is Dean Nida and I am submitting a proposal for Google Summer of Code. I would like to produce an application that will allow a user to visualize baseband data, and apply appropriate modulation and clock reco… --- ## [No UHD blocks in GNURadio](https://www.ruby-forum.com/t/no-uhd-blocks-in-gnuradio/239900)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 2\ **Last updated:** [March 19, 2014, 1:28am UTC](https://www.ruby-forum.com/t/no-uhd-blocks-in-gnuradio/239900 "2014-03-19T01:28:02Z")
I installed GNU on ubuntu 12.04 lts before installing UHD from http://gnuradio.org/redmine/projects/gnuradio/wiki/UbuntuInstall by running the following commands: sudo apt-get -y install git-core autoconf automake li… --- ## [Libgl in gnuradio-dev-image](https://www.ruby-forum.com/t/libgl-in-gnuradio-dev-image/239895)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 2\ **Last updated:** [March 19, 2014, 1:25am UTC](https://www.ruby-forum.com/t/libgl-in-gnuradio-dev-image/239895 "2014-03-19T01:25:06Z")
This is likely pretty simple, but I can’t figure it out. I’m getting a bitbake error trying to build gnuradio-dev-image. Here are my steps: git clone git://git.openembedded.org/bitbake git clone git://github.com/opene… --- ## [\[GSoC\] Proposal for radar toolbox (gr-radar)](https://www.ruby-forum.com/t/gsoc-proposal-for-radar-toolbox-gr-radar/239883)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 2\ **Last updated:** [March 18, 2014, 4:08pm UTC](https://www.ruby-forum.com/t/gsoc-proposal-for-radar-toolbox-gr-radar/239883 "2014-03-18T16:08:23Z")
Hi! My name is Stefan Wunsch and I would like to make a proposal for GSoC 2014. My project of interest is the radar toolbox as mentioned on the wiki page on gnuradio.org. I am a fifth semester student in physics at t… --- ## [\[GSoC\] Radar toolbox](https://www.ruby-forum.com/t/gsoc-radar-toolbox/239863)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [March 18, 2014, 3:54pm UTC](https://www.ruby-forum.com/t/gsoc-radar-toolbox/239863 "2014-03-18T15:54:56Z")
Hi My name is Emanuel Mendoza. I am studying Telecommunications Engineering in the Universidad Nacional de Ingenieria in Lima, Peru. I have plenty experience programming in C/C++ and a little bit of python. These mo… --- ## [Contest](https://www.ruby-forum.com/t/contest/239858)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [March 17, 2014, 6:00pm UTC](https://www.ruby-forum.com/t/contest/239858 "2014-03-17T18:00:48Z")
Hi, Just to let people know we an academic contest (US only) for winning a PicoSDR kit with MIMO OFDM ref design (FPGA), it supports GNU Radio (GigE and PCIe). You can submit with an existing (ongoing) project,… --- ## [(GSoC) MIMO Transceiver](https://www.ruby-forum.com/t/gsoc-mimo-transceiver/239814)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 3\ **Last updated:** [March 17, 2014, 1:15pm UTC](https://www.ruby-forum.com/t/gsoc-mimo-transceiver/239814 "2014-03-17T13:15:06Z")
Hello community, Two weeks have passed since I added my idea “MIMO Transceiver” on GR GSoC webpage. In the past few days, I tried to carry my project a step forward. I did some reading and made some tests on MIMO CS… --- ## [Gr-osmosdr - No RTL2832 Source Block](https://www.ruby-forum.com/t/gr-osmosdr-no-rtl2832-source-block/239777)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 2\ **Last updated:** [March 17, 2014, 10:58am UTC](https://www.ruby-forum.com/t/gr-osmosdr-no-rtl2832-source-block/239777 "2014-03-17T10:58:53Z")
Hi List, I’ve recently been trying to get gnuradio-3.6.5 to talk to my RTL2832-based tuner dongle. I installed gr-osmosdr, and all of the blocks seem to load fine in gnuradio-companion. Except for one, the rtl2832… --- ## [GSoC 2014 proposal](https://www.ruby-forum.com/t/gsoc-2014-proposal/239834)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [March 17, 2014, 10:40am UTC](https://www.ruby-forum.com/t/gsoc-2014-proposal/239834 "2014-03-17T10:40:32Z")
Hi all, I am giving link for my draft for the proposal for GSoC 2014. It would be great if you could give your feedback before i file my final application. https://github.com/201332539IIITH/GSoC-14/blob/master/Propo… --- ## [Ettus Research USRP N210](https://www.ruby-forum.com/t/ettus-research-usrp-n210/239849)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [March 17, 2014, 7:30am UTC](https://www.ruby-forum.com/t/ettus-research-usrp-n210/239849 "2014-03-17T07:30:38Z")
Hello! I am selling SDR devices, used: 1 x Ettus R. USRP N210 Datasheet: https://www.ettus.com/content/files/07495\_Ettus\_N200-210\_DS\_Flyer\_HR\_1.pdf 1 x Ethernet cable 1 x Power supply 1 x Ettus R. SBX board rev.5 … [Previous page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=82) [Next page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=84)