Re: [Discuss-gnuradio] Resampling audio using rational resampler doesn't work for multimon-ng

sox is the magic thing that makes netcat and multimon-ng works. Even if I don't do any resampling, ie sox -t raw -esigned-integer -b 16 -r 22050 - -esigned-integer -b 16 -r 22050 -t raw - and use the UDP channel from the resampled audio it works, while if I in I pipe netcat directly into

Re: [Discuss-gnuradio] Resampling audio using rational resampler doesn't work for multimon-ng

Its the UDP sink. If I use File Sink to a named pipe file multimon-ng can decode it by using cat pipe | multimon-ng -Aq - but if I use the UDP port and netcat -ulk localhost 8000 | multimon-ng -Aq - it doesn't decode, so the resampler does work but somewhere in the UDP channel something corrupts

[Discuss-gnuradio] Problems on writing QA code for source block

Hi all, I am having trouble writing QA code in python for C++ **source** blocks. Unlike the **sync** block demonstrated in the tutorial (https://wiki.gnuradio.org/index.php/Guided_Tutorial_GNU_Radio_in_C%2B%2B), which

Re: [Discuss-gnuradio] VOLK pre-built option

don't forget to uninstall uhd and uhd-devel after "yum-builddep" and before building UHD from source, though, because the build depencies of GNU Radio of course include UHD. Best regards, Marcus On Thu, 2019-05-23 at 21:55 +, Müller, Marcus (CEL) wrote: > Haven't used PyBOMBS in a while, but

Re: [Discuss-gnuradio] VOLK pre-built option

Haven't used PyBOMBS in a while, but I remember getting it to run under CentOS 7 was about as much effort as getting UHD and GNU Radio to compile from source (because CentOS has "yum-builddep uhd gnuradio", which takes care of all the build dependencies). Best regards, Marcus On Thu, 2019-05-23

Re: [Discuss-gnuradio] converting xml block files to new yaml yml block files

Check out < https://github.com/igorauad/gr-osmosdr/tree/gr3.8 > and < https://github.com/mvaenskae/gr-osmosdr/tree/gr3.8 >. Both of these folks have been trying to get gr-osmosdr working with GR3.8 fully; maybe one or both of them have converted yml scipts? - MLD On Thu, May 23, 2019, at 3:11

[Discuss-gnuradio] Need help with gr-eventstream

Folks, I am using the gr-eventstream package in GNUradio, and I need help with the EventStream Source block. This is a block that takes a PDU as a message input and produces a data stream as an output. My problem is this: I am trying to feed the data stream output to a USRP Sink as an input,

[Discuss-gnuradio] converting xml block files to new yaml yml block files

Hello. Am using gnuradio 3.8 git (python 3.7.3) and have compiled gr-osmosdr to work with that. Having some issue translating from osmosdr_source.xml to osmosdr_source_block.yml, the new yaml format Anyone tackled this? -- If something is requisite, how can it possibly be, prerequisite? vanitas

Re: [Discuss-gnuradio] VOLK pre-built option

Oh, I meant to add: does pybombs not work for you? There are a ton of modules available through pybombs that may not be prepackaged in the repos. It should take care of installing all the dependencies including, but not limited to, installing uhd and volk. https://github.com/gnuradio/pybombs for

[Discuss-gnuradio] Missing Length Tag - tagged_stream_to_pdu

Hello, I'm encountering an error in my flowgraph that involves tag propagation when stopping/starting. The flowgraph has a USRP connected to file meta sinks. The USRP can be switched by the user to stream to a null sink when recording of data is not required. When this happens, the file sinks

Re: [Discuss-gnuradio] VOLK pre-built option

Marcus, Chris, Thanks for the link, this might help. Following the guide to get the UHD drivers for USRP devices has led me to want to compile GR from source. Actually I was able to do it

Re: [Discuss-gnuradio] Issue with the Message API in Python

Hi Sebastian, classic one! You send the messages in the block's constructor in an endless loop. So, that constructor never finishes. Thus, the block never can get message-connected. Thus, your messages disappear. You can't publish message in a constructor. Spawn off a thread in the `start()`

[Discuss-gnuradio] Issue with the Message API in Python

Hi, For learning purposes I'm trying to replicate the functionality of the Message Strobe block in Python, however I'm stumped by what should be a very basic function. I'm simply attempting to publish a message every x seconds: def __init__(self, period): gr.basic_block.__init__(self,

Re: [Discuss-gnuradio] Problem with OFDM_tx OFDM_rx

So, you lose one packet; that might be due to synchronization having to lock, or due to simulated or real-world noise. Best regards, Marcus On Thu, 2019-05-23 at 15:50 +0100, farid mihoub wrote: > Hello, > > I am using OFDM_tx and OFDM_rx examples in gr-digital, at the reception > I am always

Re: [Discuss-gnuradio] Problem with OFDM_tx OFDM_rx

Hi farid mihoub - The GR-provided digital OFDM Tx -> Rx is prone to packet losses as any real wireless system will be, but especially in the first packet Tx'd for whatever reason. This OFDM is unsynchronized, so the Rx is continually searching for the OFDM preambles, which with more noise

[Discuss-gnuradio] Problem with OFDM_tx OFDM_rx

Hello, I am using OFDM_tx and OFDM_rx examples in gr-digital, at the receptionI am always loosing "1x packet_len" of bytes that I have transmitted. thank you. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org

Re: [Discuss-gnuradio] Clarification on the subject gnuradio‏

Dear Moon Light, Please stay on the mailing list. The guided tutorials *are* a course through GNU Radio. If you need an introduction to digital communications and DSP, typically I'd say "these are subjects in every electrical engineering program", but since you're asking:

Re: [Discuss-gnuradio] building 3.8

probably your log4cpp installation fine; at first I thought "waaaitaminute, the actual liblog4cpp.so is missing", but then I realized that the find search string wouldn't look for that. To check, do the following: 1. run pkg-config --libs --cflags log4cpp This should yield something like

Re: [Discuss-gnuradio] Clarification on the subject gnuradio‏

Dear Moon Light, the "Guided Tutorials" on https://tutorials.gnuradio.org Best regards, Marcus Müller On Thu, 2019-05-23 at 14:55 +0300, Moon Light wrote: > Dear Mr > I am a new student with software defined radio > I would like to learn sdr with gnuradio > Where I followed your projects on

[Discuss-gnuradio] Clarification on the subject gnuradio‏

Dear Mr I am a new student with software defined radio I would like to learn sdr with gnuradio Where I followed your projects on github But I want a course that explains the mechanics of dealing with the block in gnuradio or any material Explain this Sincerely

Re: [Discuss-gnuradio] problems installing BOOST

Hi Aaron, considering this is a problem while bulding UHD, I'd argue that this isn't really a question for the GNU Radio mailing list – more likely for the UHD mailing list. However, knowing CentOS 7, I know that just "yum install gnuradio" gives you GNU Radio 3.7.11 (which is a bit dusty,