# GNU Radio **URL:** https://www.ruby-forum.com/c/gnu-radio/15.md?page=80 [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:** 81 --- ## [GNURadio ISM band transmitter data decode](https://www.ruby-forum.com/t/gnuradio-ism-band-transmitter-data-decode/240261)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [April 4, 2014, 7:03pm UTC](https://www.ruby-forum.com/t/gnuradio-ism-band-transmitter-data-decode/240261 "2014-04-04T19:03:22Z")
Hello, I am looking for person who has experience of signal processing using gnuradio. We have a radio transmitter that transmits data in format: \\\\. With… --- ## [Embedding](https://www.ruby-forum.com/t/embedding/240253)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 3\ **Last updated:** [April 4, 2014, 3:09pm UTC](https://www.ruby-forum.com/t/embedding/240253 "2014-04-04T15:09:07Z")
Hi Anyone with input as to the feasibility of maintaining either gnu-radio or math-lab design and have something embeddable without pulling the whole environment into the target? Generating c or c++ to be compiled fo… --- ## [Gnu radio gsm implimentation](https://www.ruby-forum.com/t/gnu-radio-gsm-implimentation/240250)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [April 4, 2014, 8:26am UTC](https://www.ruby-forum.com/t/gnu-radio-gsm-implimentation/240250 "2014-04-04T08:26:40Z")
Hi all, I’m working on gsm transmitter and receiver any modules or any blocks available for it, For bust formation and frame formation. Any releases has been for gsm. Regards Ank – View this message in context: h… --- ## [Channel Coding Toolbox](https://www.ruby-forum.com/t/channel-coding-toolbox/240239)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [April 3, 2014, 5:09pm UTC](https://www.ruby-forum.com/t/channel-coding-toolbox/240239 "2014-04-03T17:09:43Z")
Discuss-gnuradio mailing list removed\_email\_address@domain.invalid https://lists.gnu.org/mailman/listinfo/discuss-gnuradio --- ## [Re: NTSC Modulation?](https://www.ruby-forum.com/t/re-ntsc-modulation/240229)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [April 3, 2014, 5:00am UTC](https://www.ruby-forum.com/t/re-ntsc-modulation/240229 "2014-04-03T05:00:56Z")
My question pertains to modulation (transmission), not reception. :slight\_smile: I have yet to find much of anything in the way of examples or a foundation of doing this. Kind of surprised this seems to be an uncommon… --- ## [NTSC Modulation?](https://www.ruby-forum.com/t/ntsc-modulation/238791)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 2\ **Last updated:** [April 3, 2014, 2:17am UTC](https://www.ruby-forum.com/t/ntsc-modulation/238791 "2014-04-03T02:17:56Z")
Googling around and was wondering if anyone has managed to get NTSC (Analog TV) modulation working in GNURadio. I have ATSC up and going, but would like to do some analog stuff too as my old exciter is junk. If not, … --- ## [FFT filter bug in GR3.7.4](https://www.ruby-forum.com/t/fft-filter-bug-in-gr3-7-4/240198)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 3\ **Last updated:** [April 3, 2014, 12:18am UTC](https://www.ruby-forum.com/t/fft-filter-bug-in-gr3-7-4/240198 "2014-04-03T00:18:46Z")
Tag: v3.7.4git-50-ga8f73d85 This demonstrates a horrible bug I found in FFT filters–change the size from “little” to “quite large”, and the scheduler goes running home to momma: thread\[thread-per-block\[1\]: \ **Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [April 3, 2014, 12:00am UTC](https://www.ruby-forum.com/t/gr-meetup-in-tysons-corner-mclean-va-wednesday-night/240204 "2014-04-03T00:00:39Z") Meetup tomorrow: Wednesday, April 2, 7pm Cylde’s of Tysons Corner (8332 Leesburg Pike, Vienna, VA 22182) I’ve only heard from a few people, so if you haven’t already, let me know if you’d like to join us. I’ll try to… --- ## [Porting BBN 80211b Receiver to gnuradio 3.7.1](https://www.ruby-forum.com/t/porting-bbn-80211b-receiver-to-gnuradio-3-7-1/240216)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [April 2, 2014, 11:58pm UTC](https://www.ruby-forum.com/t/porting-bbn-80211b-receiver-to-gnuradio-3-7-1/240216 "2014-04-02T23:58:19Z")
Hello, Recently I had to use the Wifi implementation of the BBN 80211b. The project is based on Gnuradio-3.1.1, and does not compile with 3.7.1. I made some changes to compile with the new version, and now the bn\_802… --- ## [GR 3.7.2.1 on OSX 10.8 (Mountain Lion)](https://www.ruby-forum.com/t/gr-3-7-2-1-on-osx-10-8-mountain-lion/240219)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [April 2, 2014, 9:06pm UTC](https://www.ruby-forum.com/t/gr-3-7-2-1-on-osx-10-8-mountain-lion/240219 "2014-04-02T21:06:37Z")
Hi Michael, A short while ago, I installed 3.7.2.1 from your macports implementation. The install went without trouble, and I’ve been composing and running flowgraphs from GRC with no issues. I recently tried to po… --- ## [TDMA on Gnu Radio](https://www.ruby-forum.com/t/tdma-on-gnu-radio/240209)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 5\ **Last updated:** [April 2, 2014, 2:35pm UTC](https://www.ruby-forum.com/t/tdma-on-gnu-radio/240209 "2014-04-02T14:35:18Z")
Hi everyone, I have several USRP N210 and I want all of them to transmit using the same frequency. Since I cannot use FDMA (this is one of my requirements, not a GNU Radio/USRP limitation) then I thought I would giv… --- ## [Running multiple flow graphs simultaneously](https://www.ruby-forum.com/t/running-multiple-flow-graphs-simultaneously/240202)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [April 2, 2014, 2:03pm UTC](https://www.ruby-forum.com/t/running-multiple-flow-graphs-simultaneously/240202 "2014-04-02T14:03:10Z")
Hi - Is it possible to run more than one top\_block at a time in gnuradio 3.7.x? I have an application where I wish to run an additional flow graph periodically. I have set up a thread that grabs samples via a probe… --- ## [GNU radio on Android: status?](https://www.ruby-forum.com/t/gnu-radio-on-android-status/240195)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 2\ **Last updated:** [April 1, 2014, 6:25pm UTC](https://www.ruby-forum.com/t/gnu-radio-on-android-status/240195 "2014-04-01T18:25:35Z")
Hello, What is the best way to get gnuradio on android? Do I crosscompile, or compile on the device itself, do I use linux-on-android, etc. What is the best way, the most efficient w.r.t CPU of the device at runtime… --- ## [Fwd: gr-drm for GNU Radio 3.7 available](https://www.ruby-forum.com/t/fwd-gr-drm-for-gnu-radio-3-7-available/240160)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 6\ **Last updated:** [April 1, 2014, 2:03pm UTC](https://www.ruby-forum.com/t/fwd-gr-drm-for-gnu-radio-3-7-available/240160 "2014-04-01T14:03:20Z")
Forgot to include the mailing list… ---------- Forwarded message ---------- From: Felix W. removed\_email\_address@domain.invalid Date: 2014-03-31 10:20 GMT+02:00 Subject: Re: \[Discuss-gnuradio\] gr-drm for GNU Radio 3.… --- ## [Problem with packet decoder for gmsk](https://www.ruby-forum.com/t/problem-with-packet-decoder-for-gmsk/240073)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 6\ **Last updated:** [April 1, 2014, 12:16pm UTC](https://www.ruby-forum.com/t/problem-with-packet-decoder-for-gmsk/240073 "2014-04-01T12:16:26Z")
Hello all, I’m working on gmsk transmitter and receiver past 6 months , the problem that I’m facing is in the packet decoder. I tried with wav file and signal source it worked good. my block is of this type Random\_… --- ## [GR 3.7 build failure](https://www.ruby-forum.com/t/gr-3-7-build-failure/240154)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 5\ **Last updated:** [April 1, 2014, 9:48am UTC](https://www.ruby-forum.com/t/gr-3-7-build-failure/240154 "2014-04-01T09:48:40Z")
I haven’t tried building Gnu Radio in a while, and on my F14 system today: 15%\] Building CXX object gr-blocks/lib/CMakeFiles/gnuradio-blocks.dir/message\_strobe\_random\_impl.cc.o In file included from /home/mleech/gnu… --- ## [Publish in transactions/reputed journals](https://www.ruby-forum.com/t/publish-in-transactions-reputed-journals/240182)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [April 1, 2014, 7:25am UTC](https://www.ruby-forum.com/t/publish-in-transactions-reputed-journals/240182 "2014-04-01T07:25:08Z")
Is it required to create a new block to publish in a reputed journals/transactions regarding GNU Radio? In GNU Radio, almost 200 signal processing blocks are available. Till now, I have done my work by using those onl… --- ## [Playing with 3.7](https://www.ruby-forum.com/t/playing-with-3-7/240179)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [April 1, 2014, 3:16am UTC](https://www.ruby-forum.com/t/playing-with-3-7/240179 "2014-04-01T03:16:12Z")
So, I have this flow-graph that mostly works under 3.7 now, except for something that’s horrible. In my flow-graph, I have two layers of selectors, to select the input for a WX GUI FFT sink. The layers select either … --- ## [Trying to build on OS X Maverics 10.9.2 Xcode 5.1 - Undefined symbols for architecture x86\_64](https://www.ruby-forum.com/t/trying-to-build-on-os-x-maverics-10-9-2-xcode-5-1-undefined-symbols-for-architecture-x86-64/240178)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [April 1, 2014, 1:27am UTC](https://www.ruby-forum.com/t/trying-to-build-on-os-x-maverics-10-9-2-xcode-5-1-undefined-symbols-for-architecture-x86-64/240178 "2014-04-01T01:27:26Z")
Hi Im trying to build GnuRadio on OS X 10.9.2 Im assuming the "Undefined symbols for architecture x86\_64 is related to some mismatch in libraries. Could somebody please offer some suggestions on how to debug the issu… --- ## [How to calculate SNR?](https://www.ruby-forum.com/t/how-to-calculate-snr/240051)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 14\ **Last updated:** [March 31, 2014, 9:32pm UTC](https://www.ruby-forum.com/t/how-to-calculate-snr/240051 "2014-03-31T21:32:01Z")
Hi All, In order to calculate the SNR at the receiver, I have generated a QPSK signal, sent it with an USRP through a canal and then received it with another USRP. So, I have used The “MPSK SNR Estimator” block at th… --- ## [Soqpsk](https://www.ruby-forum.com/t/soqpsk/240174)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [March 31, 2014, 9:13pm UTC](https://www.ruby-forum.com/t/soqpsk/240174 "2014-03-31T21:13:19Z")
I’ve seen it stated here on the list that the MPSK receiver block will work for either QPSK or OQPSK (Offset QPSK). Anyone know if it will work with Shaped Offset QPSK (SOQPSK) or the ARTM defined SOQPSK-TG? @(^.^)@ … --- ## [GPS signal generator](https://www.ruby-forum.com/t/gps-signal-generator/240168)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [March 31, 2014, 5:09pm UTC](https://www.ruby-forum.com/t/gps-signal-generator/240168 "2014-03-31T17:09:33Z")
Hello, I am developing a GPS generator GRC. I use this block diagram: C / A code. 1023 Samples, Sample rate: 5.1151Msps, interpolation Repeat 5 → 977.5e-9 s each chip. (1,023 MHz… --- ## [How to build an HRPT receiver with USRPB100](https://www.ruby-forum.com/t/how-to-build-an-hrpt-receiver-with-usrpb100/240163)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 0\ **Last updated:** [March 31, 2014, 4:53pm UTC](https://www.ruby-forum.com/t/how-to-build-an-hrpt-receiver-with-usrpb100/240163 "2014-03-31T16:53:45Z")
Hello, I’ve searched some information about HRPT format. I know the modulation that is used and the frame format, but I have no idea how to built it using GNU radio. Furthermore, I checked the gr-noaa repository but … --- ## [GNU Radio meetup - Wednesday](https://www.ruby-forum.com/t/gnu-radio-meetup-wednesday/240164)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 0\ **Last updated:** [March 31, 2014, 4:14pm UTC](https://www.ruby-forum.com/t/gnu-radio-meetup-wednesday/240164 "2014-03-31T16:14:37Z")
Hey everyone, I’m in Northern Virginia this week for the IEEE DySPAN conference. Since I know quite a few of the GR users in this area, I thought it’d be a good time for a quick get-together. Nothing fancy or formal, … --- ## [Constellation Decoder problem in GRC](https://www.ruby-forum.com/t/constellation-decoder-problem-in-grc/240142)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 1\ **Last updated:** [March 31, 2014, 4:01pm UTC](https://www.ruby-forum.com/t/constellation-decoder-problem-in-grc/240142 "2014-03-31T16:01:46Z")
Hi, I am working in GRC and I am Designing My own 16 QAM Transceiver without using the QAM modulation and demodulation blocks of GRC. I have done modulation using the python function qam\_constellation from source cod… --- ## [CSI in gr-ieee80211](https://www.ruby-forum.com/t/csi-in-gr-ieee80211/240076)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 4\ **Last updated:** [March 31, 2014, 3:09pm UTC](https://www.ruby-forum.com/t/csi-in-gr-ieee80211/240076 "2014-03-31T15:09:46Z")
Dear Bloessl and gnuradio list, I am currently working on gr-ieee80211. Now I want to use the long preamble to estimate the CSI. However, after I apply fft to the long preamble, I found the power for each channel is n… --- ## [Tunnel.py Example Error](https://www.ruby-forum.com/t/tunnel-py-example-error/238272)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [March 31, 2014, 2:56pm UTC](https://www.ruby-forum.com/t/tunnel-py-example-error/238272 "2014-03-31T14:56:47Z")
Hello, I am trying out the GNU Radio 3.7.2.1 tunnel.py example in gr-digital. Older versions seem to work, but with 3.7.2.1, I get the following: File “/usr/local/lib/python2.7/dist-packages/gnuradio/uhd/uhd\_swig.py”, … --- ## [Repository of examples of gnuradio and GRC?](https://www.ruby-forum.com/t/repository-of-examples-of-gnuradio-and-grc/240143)
**Author:** [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\ **Replies:** 7\ **Last updated:** [March 31, 2014, 10:03am UTC](https://www.ruby-forum.com/t/repository-of-examples-of-gnuradio-and-grc/240143 "2014-03-31T10:03:03Z")
Everyone (or almost) who writes here is testing different systems, with different hardware and creating examples. There are some people who publish their work in their own web pages, git repositories, etc., and the re… --- ## [Gr-drm for GNU Radio 3.7 available](https://www.ruby-forum.com/t/gr-drm-for-gnu-radio-3-7-available/240155)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 1\ **Last updated:** [March 31, 2014, 9:33am UTC](https://www.ruby-forum.com/t/gr-drm-for-gnu-radio-3-7-available/240155 "2014-03-31T09:33:50Z")
Exciting! This should help one of my projects along nicely. Problem is, they blocks do not show up…at all. I am using as up-to-date version of GNURadio that is available to pacman. The make goes fine, make-test passe… --- ## [Questions about receiving signals of Inmarsat I-4 Satellites](https://www.ruby-forum.com/t/questions-about-receiving-signals-of-inmarsat-i-4-satellites/240116)
**Author:** [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Replies:** 7\ **Last updated:** [March 31, 2014, 8:41am UTC](https://www.ruby-forum.com/t/questions-about-receiving-signals-of-inmarsat-i-4-satellites/240116 "2014-03-31T08:41:52Z")
Hi, I am trying to receive signal from I-4 satellites of Inmarsat. I found that I-4 satellites have one global beam with 25 KHz bandwidth and several regional beams with 50 KHz bandwidth. However, I have scanned thr… [Previous page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=79) [Next page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=81)