# GNU Radio **URL:** https://www.ruby-forum.com/c/gnu-radio/15.md?page=57 [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:** 58 --- ## [\[GSoC\] Co-Processors Update #9](https://www.ruby-forum.com/t/gsoc-co-processors-update-9/231461)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 6\ **Last updated:** [August 11, 2014, 9:03pm UTC](https://www.ruby-forum.com/t/gsoc-co-processors-update-9/231461 "2014-08-11T21:03:34Z")
Hello all, Logistical: coproc dev call is scheduled for August 12th at 2pm US central time Next week is the last week of the program. I’ll treat it like a usual week. After pencils down there is the last last week to… --- ## [Updating Gnuradio](https://www.ruby-forum.com/t/updating-gnuradio/231492)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [August 11, 2014, 8:08pm UTC](https://www.ruby-forum.com/t/updating-gnuradio/231492 "2014-08-11T20:08:37Z")
Hi All, I’m sorry to be asking questions like this, but I don’t know where else to go. I’ve really tried figuring it out on my own, but I’m not able to. I’ve downloaded and installed gnuradio3.7.3 by following the et… --- ## [Anyone seen this before?](https://www.ruby-forum.com/t/anyone-seen-this-before/231489)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [August 11, 2014, 2:46pm UTC](https://www.ruby-forum.com/t/anyone-seen-this-before/231489 "2014-08-11T14:46:17Z")
Executing: “/home/ken/RA/simple\_ra/trunk/reference\_receiver.py” linux; GNU C++ version 4.6.3; Boost\_104800; UHD\_003.007.001-84-gd99ce4ef gr-osmosdr v0.1.1-9-gc65d205d (0.1.2git) gnuradio 3.7.4 built-in source types: f… --- ## [Question about headr\_payload\_demux module](https://www.ruby-forum.com/t/question-about-headr-payload-demux-module/231475)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [August 10, 2014, 5:13pm UTC](https://www.ruby-forum.com/t/question-about-headr-payload-demux-module/231475 "2014-08-10T17:13:04Z")
Hi all, I am reading “header\_payload\_demux” module, I have some questions about it. 1, in “header\_payload\_demux\_impl.cc” line 235, seems need update nread’s value nread += trigger\_offset; I think without this upda… --- ## [USRP-1 and 4ch receiver?](https://www.ruby-forum.com/t/usrp-1-and-4ch-receiver/231468)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [August 10, 2014, 4:59pm UTC](https://www.ruby-forum.com/t/usrp-1-and-4ch-receiver/231468 "2014-08-10T16:59:58Z")
Mr. Marcus Mueller, Thank you very much for suggestions. I have some more questions. I searched for the GNU Radio mailing-list archive and found a discussion Subject: \[Discuss-gnuradio\] USRP1 4 Channel Subdev Issu… --- ## [Demodulating a MPT1327 signal](https://www.ruby-forum.com/t/demodulating-a-mpt1327-signal/231419)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [August 9, 2014, 11:48pm UTC](https://www.ruby-forum.com/t/demodulating-a-mpt1327-signal/231419 "2014-08-09T23:48:41Z")
MPT1327 uses MSK on its control channel. I am attempting to use NBFM Receive to demodulate the signal into a WAV file that I can play back and use sdrtrunk to decode it. So far my best attempt is set up as follows: … --- ## [PTAR in OFDM](https://www.ruby-forum.com/t/ptar-in-ofdm/231464)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [August 9, 2014, 4:52pm UTC](https://www.ruby-forum.com/t/ptar-in-ofdm/231464 "2014-08-09T16:52:31Z")
hi, if i want to measure the PATR(peak-to average radio)in OFDM system, is there any existed block about this? thanks, BZS --- ## [OFDM TRANSFER and RECEIVE IN GRC](https://www.ruby-forum.com/t/ofdm-transfer-and-receive-in-grc/231358)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 13\ **Last updated:** [August 9, 2014, 3:15pm UTC](https://www.ruby-forum.com/t/ofdm-transfer-and-receive-in-grc/231358 "2014-08-09T15:15:28Z")
Hi everybody, I am using USRP N200 and the antenna is VERT2450. One system sends the “input” file (in repeat mode)after ofdm modulation.The other system receives this and demodulates and saves to a “output” file. Th… --- ## [RF drive test app using GR](https://www.ruby-forum.com/t/rf-drive-test-app-using-gr/231460)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [August 9, 2014, 5:17am UTC](https://www.ruby-forum.com/t/rf-drive-test-app-using-gr/231460 "2014-08-09T05:17:46Z")
Thought I’d share an RF drive test app I wrote using GR. It decimates WBFM channel power down to 1 second then logs that along with GPS NMEA data from the B200 GPSDO. The post processing takes the power and generat… --- ## [Gnuradio Companion Blocks missing property tabs](https://www.ruby-forum.com/t/gnuradio-companion-blocks-missing-property-tabs/231438)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [August 8, 2014, 3:21pm UTC](https://www.ruby-forum.com/t/gnuradio-companion-blocks-missing-property-tabs/231438 "2014-08-08T15:21:41Z")
Hello all, I noticed today that, for example, my ‘QT GUI Time Sink’ blocks properties window is missing the config tab. This means I cannot change the label of my time sink plots. In general, all of my grc blocks ha… --- ## [\[GSoC\] FEC Update](https://www.ruby-forum.com/t/gsoc-fec-update/230991)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [August 8, 2014, 10:57am UTC](https://www.ruby-forum.com/t/gsoc-fec-update/230991 "2014-08-08T10:57:30Z")
\-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hey all, I have some updates for you too. After some evaluations with my mentors, I started from scratch and wrote my own OOT module gr-celec which now contains a workin… --- ## [Macports install where is gnuradio-core?](https://www.ruby-forum.com/t/macports-install-where-is-gnuradio-core/231440)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 3\ **Last updated:** [August 8, 2014, 1:42am UTC](https://www.ruby-forum.com/t/macports-install-where-is-gnuradio-core/231440 "2014-08-08T01:42:46Z")
Hello, I recently installed gnu radio using macports and so far things seem to be working, that is I can open and edit changes in GRC, make my own modules and see it compile etc. Early days.However I dont see where g… --- ## [Problem with Probe Signal Vector Block](https://www.ruby-forum.com/t/problem-with-probe-signal-vector-block/231430)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [August 7, 2014, 5:16pm UTC](https://www.ruby-forum.com/t/problem-with-probe-signal-vector-block/231430 "2014-08-07T17:16:33Z")
Hi, I made a Flowgraph in GNU Radio which shows me the FFT of the samples that are sent by a Raspberry Pi over TCP. It looks like this: Osmosdr Source -\> Stream to Vector -\> FFT -\> Complex to Mag -\> Log10 -\> Vector t… --- ## [Block struct change](https://www.ruby-forum.com/t/block-struct-change/231426)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 4\ **Last updated:** [August 7, 2014, 5:11pm UTC](https://www.ruby-forum.com/t/block-struct-change/231426 "2014-08-07T17:11:47Z")
Hi All, I want know to why the block has been split into two class: “block\_name.cc” and “block\_name\_impl.cc”, why do we need a virtual class, and use a “\_impl” to inherit it? As we know, the older gnuradio just use … --- ## [Continuous and Discrete data combine](https://www.ruby-forum.com/t/continuous-and-discrete-data-combine/234816)
**Author:** [@alcina](https://www.ruby-forum.com/u/alcina)\ **Replies:** 5\ **Last updated:** [August 7, 2014, 3:53pm UTC](https://www.ruby-forum.com/t/continuous-and-discrete-data-combine/234816 "2014-08-07T15:53:46Z")
Hello, Is there any way to combine continuous block (like audio source) and discrete block (like message source) ? Question 1 I using add block to add them together, but it failed. It work well when the discrete bloc… --- ## [Fwd: Install UCLA-gr-802.15.4 into E100 has error](https://www.ruby-forum.com/t/fwd-install-ucla-gr-802-15-4-into-e100-has-error/231412)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [August 7, 2014, 10:57am UTC](https://www.ruby-forum.com/t/fwd-install-ucla-gr-802-15-4-into-e100-has-error/231412 "2014-08-07T10:57:53Z")
\---------- Forwarded message ---------- From: Zongyi LIU removed\_email\_address@domain.invalid Date: 2014-08-06 17:30 GMT+02:00 Subject: Re: \[Discuss-gnuradio\] Install UCLA-gr-802.15.4 into E100 has error To: Bastian… --- ## [Regarding Filtering Aliasing in USRP B210](https://www.ruby-forum.com/t/regarding-filtering-aliasing-in-usrp-b210/231386)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [August 7, 2014, 10:39am UTC](https://www.ruby-forum.com/t/regarding-filtering-aliasing-in-usrp-b210/231386 "2014-08-07T10:39:27Z")
Hello, We are generating a single tone at 875MHz and we are able to see it using the USRP and Gnuradio while sampling at 16MHz. However, when tuning to 860MHz we see an alias tone near 859MHz; something similar occur… --- ## [Query on simulation of MIMO on Gnuradio](https://www.ruby-forum.com/t/query-on-simulation-of-mimo-on-gnuradio/231398)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [August 7, 2014, 10:35am UTC](https://www.ruby-forum.com/t/query-on-simulation-of-mimo-on-gnuradio/231398 "2014-08-07T10:35:53Z")
Hi, we are trying to implement alamouti encoding and decoding on an underlying ofdm communication system in Gnuradio. So we are using benchmark\_tx.py. In ofdm mapper block we have written our own block which does a… --- ## [Audio out put](https://www.ruby-forum.com/t/audio-out-put/231402)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 1\ **Last updated:** [August 7, 2014, 10:34am UTC](https://www.ruby-forum.com/t/audio-out-put/231402 "2014-08-07T10:34:06Z")
Hi I am modulating a .wav audio file and transmitting using ofdm example using gnuradio. What should I dou to receive it as an audio file using the receive example. If i write the receiver output to a wav file, it do… --- ## [Gnuradio on ubuntu touch](https://www.ruby-forum.com/t/gnuradio-on-ubuntu-touch/230953)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 23\ **Last updated:** [August 7, 2014, 10:34am UTC](https://www.ruby-forum.com/t/gnuradio-on-ubuntu-touch/230953 "2014-08-07T10:34:06Z")
Is gnuradio able to run on Ubuntu Touch? I want to use my tablet with gnuradio and rtl-sdr. Do you guys think its possible with Ubuntu Touch? Or there is another way to do it? Thanks Regis – View this message in co… --- ## [Questions about get\_tags\_in\_range](https://www.ruby-forum.com/t/questions-about-get-tags-in-range/231425)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 3\ **Last updated:** [August 7, 2014, 10:24am UTC](https://www.ruby-forum.com/t/questions-about-get-tags-in-range/231425 "2014-08-07T10:24:33Z")
Hi all: I’m reading the source code ofdm\_chanest\_vcvc\_impl.cc.And I don’t know this command: // Propagate tags std::vectorgr::tag\_t tags; get\_tags\_in\_range(tags, 0,nitems\_read(0), nitems\_read(0)+framesize); I w… --- ## [USRP-1 and 4ch receiver?](https://www.ruby-forum.com/t/usrp-1-and-4ch-receiver/231422)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [August 7, 2014, 2:48am UTC](https://www.ruby-forum.com/t/usrp-1-and-4ch-receiver/231422 "2014-08-07T02:48:44Z")
Dear experts, I am now using URSP-1 for 2-channel receiver (150/400MHz) successfully. Now there is a plan to expand this to 3-ch or 4-ch. As the frequencies are very far apart, i.e., 150MHz/400MHz/~1GHz/~2GHz, we… --- ## [Stable on Linux, many crashes on Windows and OS X](https://www.ruby-forum.com/t/stable-on-linux-many-crashes-on-windows-and-os-x/231319)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 15\ **Last updated:** [August 7, 2014, 1:10am UTC](https://www.ruby-forum.com/t/stable-on-linux-many-crashes-on-windows-and-os-x/231319 "2014-08-07T01:10:08Z")
Hello, I want my program to be platform independent (it should work on Linux, OS X and Windows). Although it runs stable on Linux (Xubuntu 14.04 amd64), on both Windows (Win 7 x64) and OS X (10.9) it´s crashing after… --- ## [TypeError for gr\_vector\_float arg](https://www.ruby-forum.com/t/typeerror-for-gr-vector-float-arg/231387)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [August 6, 2014, 9:38pm UTC](https://www.ruby-forum.com/t/typeerror-for-gr-vector-float-arg/231387 "2014-08-06T21:38:54Z")
Trying to get my OOT block to accept a vector of floats for filter taps. I used a couple in-tree blocks (mostly ofdm\_carier\_allocator and fir\_interpolator) for a quick reference. And I have fir interp/decim in my flow… --- ## [Fwd: Install UCLA-gr-802.15.4 into E100 has error](https://www.ruby-forum.com/t/fwd-install-ucla-gr-802-15-4-into-e100-has-error/231411)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [August 6, 2014, 5:46pm UTC](https://www.ruby-forum.com/t/fwd-install-ucla-gr-802-15-4-into-e100-has-error/231411 "2014-08-06T17:46:12Z")
\---------- Forwarded message ---------- From: Zongyi LIU removed\_email\_address@domain.invalid Date: 2014-08-06 16:52 GMT+02:00 Subject: Re: \[Discuss-gnuradio\] Install UCLA-gr-802.15.4 into E100 has error To: Tom R. r… --- ## [Fwd: Install UCLA-gr-802.15.4 into E100 has error](https://www.ruby-forum.com/t/fwd-install-ucla-gr-802-15-4-into-e100-has-error/231410)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [August 6, 2014, 5:43pm UTC](https://www.ruby-forum.com/t/fwd-install-ucla-gr-802-15-4-into-e100-has-error/231410 "2014-08-06T17:43:13Z")
\---------- Forwarded message ---------- From: Zongyi LIU removed\_email\_address@domain.invalid Date: 2014-08-06 17:30 GMT+02:00 Subject: Re: \[Discuss-gnuradio\] Install UCLA-gr-802.15.4 into E100 has error To: Bastian… --- ## [Changing Flowgraph at runtime](https://www.ruby-forum.com/t/changing-flowgraph-at-runtime/231405)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 7\ **Last updated:** [August 6, 2014, 4:31pm UTC](https://www.ruby-forum.com/t/changing-flowgraph-at-runtime/231405 "2014-08-06T16:31:43Z")
Hello everyone, Does anyone know if it’s possible create and destroy blocks at runtime? I know we can reconnect the blocks at runtime \[lock(), reconnect, unlock()\], but I don’t know if you can create or destroy… Tha… --- ## [Run gr\_specest](https://www.ruby-forum.com/t/run-gr-specest/231400)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 6\ **Last updated:** [August 6, 2014, 2:36pm UTC](https://www.ruby-forum.com/t/run-gr-specest/231400 "2014-08-06T14:36:45Z")
Hi all: I have installed the gr\_specest toolbox successfully.And I use the gnuradio 3.7.5.But when I run the specest\_from\_file.py,error exists: File "/usr/local/bin/specest\_from\_file.py", line 142 SyntaxError:… --- ## [Install UCLA-gr-802.15.4 into E100 has error](https://www.ruby-forum.com/t/install-ucla-gr-802-15-4-into-e100-has-error/231380)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 2\ **Last updated:** [August 6, 2014, 10:01am UTC](https://www.ruby-forum.com/t/install-ucla-gr-802-15-4-into-e100-has-error/231380 "2014-08-06T10:01:11Z")
Hello everyone: Recently, I want to install UCLA-gr-ieee802.15.4 module into my USRP E100. When I was configuring it, UCLA-gr-ieee802.15.4 had some error. I modify the PATH as follow: //“C\_INCLUDE\_PATH=/usr/include/… --- ## [Help on cmake command](https://www.ruby-forum.com/t/help-on-cmake-command/231390)
**Author:** [@addis\_a](https://www.ruby-forum.com/u/addis_a)\ **Replies:** 0\ **Last updated:** [August 6, 2014, 4:45am UTC](https://www.ruby-forum.com/t/help-on-cmake-command/231390 "2014-08-06T04:45:16Z")
Hello all I tried to build the following program in Windows 8 command line http://gnuradio.org/redmine/projects/gnuradio/wiki/OutOfTreeModules Using the commands mkdirbuild cd build cmake …/ However, the command c… [Previous page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=56) [Next page](https://www.ruby-forum.com/c/gnu-radio/15.md?page=58)