# GNU Radio **URL:** https://www.ruby-forum.com/c/gnu-radio/15.md?page=46 [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:** 47 --- ## [Some efforts and tools on GPS simulation and RF signal replay](https://www.ruby-forum.com/t/some-efforts-and-tools-on-gps-simulation-and-rf-signal-replay/232883)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [November 2, 2014, 1:04pm UTC](https://www.ruby-forum.com/t/some-efforts-and-tools-on-gps-simulation-and-rf-signal-replay/232883 "2014-11-02T13:04:39Z")
Some efforts were put on replaying GPS signal http://sdr-x.github.io/Some%20efforts%20and%20tools%20on%20GPS%20signal%20replay%20(GPS重放模拟)/, but it is only partially successful, not fully successful. Some tools/script… --- ## [Request for feature in GRC](https://www.ruby-forum.com/t/request-for-feature-in-grc/232877)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [November 2, 2014, 11:52am UTC](https://www.ruby-forum.com/t/request-for-feature-in-grc/232877 "2014-11-02T11:52:26Z")
I recently had a problem with GRC where two threads were accessing a set\_variable callback creating some unwanted behaviour (actually crashing the xmlrpc server). I fixed it by editing the python file created by GRC a… --- ## [All ist klar, Herr Kommisar](https://www.ruby-forum.com/t/all-ist-klar-herr-kommisar/232853)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 9\ **Last updated:** [November 2, 2014, 11:46am UTC](https://www.ruby-forum.com/t/all-ist-klar-herr-kommisar/232853 "2014-11-02T11:46:28Z")
I’ve seen this comment for a while now in flowgraph.cc and most of the time chose to ignore it. Today I saw it and decided to do a quick google search to see what I could find. What??? Why??? Funny “ea… --- ## [\[UHD 3.8.0\] Release Announcement](https://www.ruby-forum.com/t/uhd-3-8-0-release-announcement/232788)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 3\ **Last updated:** [November 2, 2014, 4:19am UTC](https://www.ruby-forum.com/t/uhd-3-8-0-release-announcement/232788 "2014-11-02T04:19:28Z")
Hello lists, at this point, we are releasing our UHD version 3.8.0. There were some minor changes since the release candidate, but mainly regarding documentation, the Boost version and minor build fixes to make sure U… --- ## [Re: xmlrpc and threading](https://www.ruby-forum.com/t/re-xmlrpc-and-threading/232876)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [November 1, 2014, 6:45pm UTC](https://www.ruby-forum.com/t/re-xmlrpc-and-threading/232876 "2014-11-01T18:45:36Z")
Marcus, thanks for the suggestions. I fixed the problem by protecting the set\_ callback of the variable with a lock. Incidentally this can be a nice little feature of GRC (i will put a request for feature on a separ… --- ## [Re: FunCube Dongle pro +](https://www.ruby-forum.com/t/re-funcube-dongle-pro/232862)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 9\ **Last updated:** [November 1, 2014, 4:30pm UTC](https://www.ruby-forum.com/t/re-funcube-dongle-pro/232862 "2014-11-01T16:30:47Z")
This is because the version of the libusb library you have is too old to have that particular API call in it. I use ubuntu 12.04 and libusb-1.0-0-dev Do you what version of libusb is compatible? --- ## [Xmlrpc and threading](https://www.ruby-forum.com/t/xmlrpc-and-threading/232864)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [November 1, 2014, 12:36am UTC](https://www.ruby-forum.com/t/xmlrpc-and-threading/232864 "2014-11-01T00:36:22Z")
I have an application that uses two probes/function\_probe blocks and an xmlrpc client. Most of the times I see that the two threads are crushing, I guess making concurrent requests to the SimpleXMLRPCServer. I googl… --- ## [PSK Demod block](https://www.ruby-forum.com/t/psk-demod-block/232863)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [November 1, 2014, 12:16am UTC](https://www.ruby-forum.com/t/psk-demod-block/232863 "2014-11-01T00:16:05Z")
Hi, do you know if the default PSK Demodulation block does any frecuency correction or time recovery? After running some tests, I have noticed that when I use a Channel Model between PSK mod and PSK demod, I success… --- ## [FunCube Dongle pro +](https://www.ruby-forum.com/t/funcube-dongle-pro/232860)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [October 31, 2014, 10:58pm UTC](https://www.ruby-forum.com/t/funcube-dongle-pro/232860 "2014-10-31T22:58:32Z")
Hi, I have installed GNU Radio Companion 3.7.5 and the gr-fcdproplus from dl1ksv/gr-fcdproplus (GitHub). By simpy connecting the fcdproplus block with an fft sink I receive the following error: File “/home/duthsat/t… --- ## [Latest Gnuradio git won't compile on OS X](https://www.ruby-forum.com/t/latest-gnuradio-git-wont-compile-on-os-x/232726)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 9\ **Last updated:** [October 31, 2014, 10:04pm UTC](https://www.ruby-forum.com/t/latest-gnuradio-git-wont-compile-on-os-x/232726 "2014-10-31T22:04:17Z")
I just got the latest git version of gnuradio and tried to compile, but I get compilation errors resulting from avxintrin.h: These errors seems to be common and result from using non-standard GCC-extensions that cla… --- ## [ERRO RATE problem](https://www.ruby-forum.com/t/erro-rate-problem/234843)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [October 31, 2014, 10:00pm UTC](https://www.ruby-forum.com/t/erro-rate-problem/234843 "2014-10-31T22:00:06Z")
i was working in BPSK mod/demod and i’d like to see the BER performance. i used the BER ERROR RATE block, connecting in the input 1: random source and imput 2: output of the decodec. The problem is that the error alw… --- ## [Updating GNU Radio, UHD or PyBOMBS](https://www.ruby-forum.com/t/updating-gnu-radio-uhd-or-pybombs/232822)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 7\ **Last updated:** [October 31, 2014, 9:55pm UTC](https://www.ruby-forum.com/t/updating-gnu-radio-uhd-or-pybombs/232822 "2014-10-31T21:55:20Z")
Hi all, I am new to all of this, so I’m looking for some guidance. I recently setup UHD and GNURadio using PyBOMBS on Ubuntu 14.04. I now want to do a git pull and update my stuff. I’m not sure what commands to exec… --- ## [Software Compatibility among USRP2, N and X Series](https://www.ruby-forum.com/t/software-compatibility-among-usrp2-n-and-x-series/232852)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 4\ **Last updated:** [October 31, 2014, 9:45pm UTC](https://www.ruby-forum.com/t/software-compatibility-among-usrp2-n-and-x-series/232852 "2014-10-31T21:45:48Z")
Dear all, I found most existed projects were based on USRP2 and some current on-going project are using N200/210. It seems to me that both of these two models have similar hardware specification, but USRP2 is out of … --- ## [Re: \[USRP-users\] Switching and high spike in spectrum](https://www.ruby-forum.com/t/re-usrp-users-switching-and-high-spike-in-spectrum/232855)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [October 31, 2014, 6:33pm UTC](https://www.ruby-forum.com/t/re-usrp-users-switching-and-high-spike-in-spectrum/232855 "2014-10-31T18:33:07Z")
On 10/29/2014 01:54 PM, bob wole via USRP-users wrote: When I run top flowgrpah (without transmitting anything) and observe of the band. That spike in the middle is a consequence of using direct conversion in gener… --- ## [Installing UHD and GNU Radio](https://www.ruby-forum.com/t/installing-uhd-and-gnu-radio/232850)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [October 31, 2014, 5:04pm UTC](https://www.ruby-forum.com/t/installing-uhd-and-gnu-radio/232850 "2014-10-31T17:04:50Z")
Hello, Over the past few days, I’ve learned a lot about installing UHD and GNU Radio on Ubuntu. I’m a Windows user new to Linux, so there were a lot of growing pains. I made a guide for people like me out there gettin… --- ## [View satellite beacon in spectrum analyzer](https://www.ruby-forum.com/t/view-satellite-beacon-in-spectrum-analyzer/232838)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [October 30, 2014, 4:17pm UTC](https://www.ruby-forum.com/t/view-satellite-beacon-in-spectrum-analyzer/232838 "2014-10-30T16:17:59Z")
Dear Gnu Radioers, I am trying to follow the advices on Seeber’s presentations (http://www.trondeau.com/storage/grcon12/Seeber-BlindSignalAnalysis.pdf) to interpret a satellite signal. I do not have the LNB datasheet,… --- ## [Serial port source/sink](https://www.ruby-forum.com/t/serial-port-source-sink/232797)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 8\ **Last updated:** [October 30, 2014, 11:25am UTC](https://www.ruby-forum.com/t/serial-port-source-sink/232797 "2014-10-30T11:25:08Z")
Hey there! i’m working on a proyect of comunications and i need to get my serial data stream into gnuradio companion, so i’m looking for a block (2 actually) that can make this work, i tried to install pyserial and … --- ## [Channel Options in WX GUI Scope](https://www.ruby-forum.com/t/channel-options-in-wx-gui-scope/232818)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [October 30, 2014, 11:06am UTC](https://www.ruby-forum.com/t/channel-options-in-wx-gui-scope/232818 "2014-10-30T11:06:39Z")
Hi Guys, I want to set ‘Marker’ to ‘Dot Large’ by default, can I set this in the flow graph somehow? Thanks!! David David Halls Ph.D. Research Engineer Toshiba Research Europe Limited 32 Queen Square, Bristol, B… --- ## [Guest researcher position](https://www.ruby-forum.com/t/guest-researcher-position/232829)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [October 30, 2014, 9:51am UTC](https://www.ruby-forum.com/t/guest-researcher-position/232829 "2014-10-30T09:51:30Z")
Hi, this is an offer that Dr. Hamid Gharavi of NIST asked me to distribute among SDR folks. Hamid offers research scholarships for people with experience in software defined networking and radio to participate in the… --- ## [Gnuradio over Zynq](https://www.ruby-forum.com/t/gnuradio-over-zynq/232783)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [October 30, 2014, 8:14am UTC](https://www.ruby-forum.com/t/gnuradio-over-zynq/232783 "2014-10-30T08:14:16Z")
Hi, I would like to run the example from the GNURadio adaptation for Zynq ( http://gnuradio.org/redmine/projects/gnuradio/wiki/Zynq), but I am not able to run it, it gives me a coredump. I managed to create the boo… --- ## [Problems with redmine](https://www.ruby-forum.com/t/problems-with-redmine/232827)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [October 30, 2014, 5:05am UTC](https://www.ruby-forum.com/t/problems-with-redmine/232827 "2014-10-30T05:05:13Z")
I just did an install on Fedora 21 and there is a problem with the install directions on redmine. I can’t seem to make an account (it says my email is already registered and when I try to recover a lost password I ge… --- ## [Serial 493 error\_code 11 request\_code 153 minor\_code 3](https://www.ruby-forum.com/t/serial-493-error-code-11-request-code-153-minor-code-3/232826)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [October 30, 2014, 4:58am UTC](https://www.ruby-forum.com/t/serial-493-error-code-11-request-code-153-minor-code-3/232826 "2014-10-30T04:58:15Z")
Hi, My name is vivek. when I was working with gnuradio-companion, I could able to run any flow graph. I dont know what changes I have made. I have paste the error below… can you please kindly advise me what is the pr… --- ## [CFO in OFDM](https://www.ruby-forum.com/t/cfo-in-ofdm/232812)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [October 29, 2014, 10:20pm UTC](https://www.ruby-forum.com/t/cfo-in-ofdm/232812 "2014-10-29T22:20:35Z")
Dear all, I am suffering from issues related to residual CFO error manifesting itself as a slight rotation over time. This can be partially corrected in the FD using tracking pilots which I have implemented but there … --- ## [Switching and high spike in spectrum](https://www.ruby-forum.com/t/switching-and-high-spike-in-spectrum/232819)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [October 29, 2014, 6:55pm UTC](https://www.ruby-forum.com/t/switching-and-high-spike-in-spectrum/232819 "2014-10-29T18:55:54Z")
USRPN210r4 with SBX I am observing a strong spike at the center of the receive spectrum when I start burst transmission. My top flowgraph contains following two hierarchical blocks A transmitter flow graph with (tx… --- ## [Installing gnuradio and additional projects](https://www.ruby-forum.com/t/installing-gnuradio-and-additional-projects/232802)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [October 29, 2014, 6:34pm UTC](https://www.ruby-forum.com/t/installing-gnuradio-and-additional-projects/232802 "2014-10-29T18:34:25Z")
Hello all, I have installed gnuradio using build-gnuradio. How do I go about gr-drm or another project that is not there by detault? If i use pybombs, it brings in source code for all the dependencies. Is this the r… --- ## [Gqrx gr project](https://www.ruby-forum.com/t/gqrx-gr-project/232807)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [October 29, 2014, 10:13am UTC](https://www.ruby-forum.com/t/gqrx-gr-project/232807 "2014-10-29T10:13:44Z")
Hello, There is an issue for the installation of gqrx. When “qmake …” it says: Project MESSAGE: No prefix given. Using /usr/local why? Best, --- ## [Couldn't find gnuradio-core.pc](https://www.ruby-forum.com/t/couldnt-find-gnuradio-core-pc/232806)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [October 29, 2014, 10:00am UTC](https://www.ruby-forum.com/t/couldnt-find-gnuradio-core-pc/232806 "2014-10-29T10:00:37Z")
Hello, After installing gnuradio by running this command wget http://www.sbrac.org/files/build-gnuradio && chmod a+x ./build-gnuradio && ./build-gnuradio on ubuntu 14.04, I want to install ‘gr-chancoding’ but it coul… --- ## [Filter in rational resampler](https://www.ruby-forum.com/t/filter-in-rational-resampler/231257)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 7\ **Last updated:** [October 28, 2014, 9:31pm UTC](https://www.ruby-forum.com/t/filter-in-rational-resampler/231257 "2014-10-28T21:31:45Z")
Hello, I was studying the code of the rational resampler block in gnuradio/gr-filter/pythoin/rational\_resampler.py and I have a doubt about the low pass filter generated by the design\_filter() function. It seems that… --- ## [Fwd: QTGui Number Sink, Demodulation Problems](https://www.ruby-forum.com/t/fwd-qtgui-number-sink-demodulation-problems/232511)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [October 28, 2014, 9:13pm UTC](https://www.ruby-forum.com/t/fwd-qtgui-number-sink-demodulation-problems/232511 "2014-10-28T21:13:51Z")
The purpose of my current experiments is to create a 16QAM transmitter and receiver, with UDP sources/sinks, and using bladeRFx40’s to transmit/receive. I’m using Number sinks to check values at various points of my … --- ## [Skiphead block with reset](https://www.ruby-forum.com/t/skiphead-block-with-reset/232796)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 3\ **Last updated:** [October 28, 2014, 7:59pm UTC](https://www.ruby-forum.com/t/skiphead-block-with-reset/232796 "2014-10-28T19:59:49Z")
Hi all, I was looking into the possibility of adding a reset ability (ala the head block) to skiphead. In my search to find out if it had already been done, I came up with this commit message: commit 9aabbe0601919c9… [Previous page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=45) [Next page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=47)