Re: GnuRadio Help

: 2020년 3월 10일 화요일 오전 2:18 > 받는 사람: discuss-gnuradio@gnu.org > 제목: GnuRadio Help > > Hi Folks, > This is my first post on this group. > Anybody can tell me the right procedure and where to get the Gnuradio v. 3.8 > or above > For Ubuntu? I have tried in Terminal to

Re: GnuRadio Help

(By the way, do not forget uninstalling GNU Radio 3.7 before trying this.) Regards, Kyeong Su Shin 보낸 사람: Kyeong Su Shin 보낸 날짜: 2020년 3월 10일 화요일 오전 2:43 받는 사람: Vincenzo Mone ; discuss-gnuradio@gnu.org 제목: Re: GnuRadio Help Hello Vincenzo: For an AMD64 system

Re: GnuRadio Help

PyBOMBs or try building it from manually (from source). These are described in other sections of the wiki page linked above. Regards, Kyeong Su Shin 보낸 사람: Vincenzo Mone 대신 Discuss-gnuradio 보낸 날짜: 2020년 3월 10일 화요일 오전 2:18 받는 사람: discuss-gnuradio@gnu.org 제목: GnuRadio

GnuRadio Help

Hi Folks, This is my first post on this group. Anybody can tell me the right procedure and where to get the Gnuradio v. 3.8 or above For Ubuntu? I have tried in Terminal to digit sudo apt gnuradio but I get installed The 3.7 version. Please any help? Thanks in advance 73 de Enzo IK8OZV E

Re: [Discuss-gnuradio] Help getting accurate AWGN SNR values

Shin > *Sent:* Mittwoch, 3. Juli 2019 03:43 > *To:* Vladislav Fomitchev ; > discuss-gnuradio@gnu.org > *Subject:* Re: [Discuss-gnuradio] Help getting accurate AWGN SNR values > > > > Hello Vladislav: > > > > In my eyes, those plots look correct. > > > &

Re: [Discuss-gnuradio] Help getting accurate AWGN SNR values

-gnuradio-bounces+jonas.manthey=u-blox@gnu.org] On Behalf Of Kyeong Su Shin Sent: Mittwoch, 3. Juli 2019 03:43 To: Vladislav Fomitchev ; discuss-gnuradio@gnu.org Subject: Re: [Discuss-gnuradio] Help getting accurate AWGN SNR values Hello Vladislav: In my eyes, those plots look correct. &quo

Re: [Discuss-gnuradio] Help getting accurate AWGN SNR values

4:06:11 받는 사람: discuss-gnuradio@gnu.org 제목: [Discuss-gnuradio] Help getting accurate AWGN SNR values Hello, I have been trying to create a simulation with some basic PSK signals at varying SNR values by separately generating a signal and gaussian noise and adding them together. I am howe

Re: [Discuss-gnuradio] Help with sound output

Hi Sara - Can you give us something more to work with, for example a link to the Youtube video and another to your code? I'm sure folks here can help, but without more info the best we can offer is high-level suggestions on how to fix sample rate differences. - MLD On Thu, Jun 6, 2019, at 12:39

[Discuss-gnuradio] Help with sound output

Hi, I'm using a USRP205mini-i. I followed the YouTube tutorial online on how to build a FM receiver. I execute the flow graph, and all I hear is very choppy and high pitched audio coming from my computer's speaker (i see aUaUaU and an occasional O. I know this has to to with the input/output freque

[Discuss-gnuradio] help with OOT module header_format_base child

hi all i created a "noblock" OOT module child class of header_format_base no XML installed (edited the Cmakelists file in grc folder) compilation OK installation OK nm -C -u lib-*** OK python import OK in top_block.py i have these lines : self.hdr_format = hdr_format = f4gsw.header_format_cc1101('

Re: [Discuss-gnuradio] HELP with "packet header parser"

I'm assuming the reason you're not looking at the rx_ofdm.py code is because you don't have the rx_ofdm.py code. You can use grcc -d . rx_ofdm.grc to generate the python code. -- Cinaed On 1/6/19 2:10 AM, Alban Meffre wrote: > hi > i does not work because the packet header parser expect an

Re: [Discuss-gnuradio] HELP with "packet header parser"

Okay, well you'll have to post your flowgraph and I'll try to help you. Or post your python code and maybe someone on the list may be able to help you. -- Cinaed On 1/6/19 2:10 AM, Alban Meffre wrote: > hi > i does not work because the packet header parser expect an > "packet_header_default" ob

Re: [Discuss-gnuradio] HELP with "packet header parser"

hi i does not work because the packet header parser expect an "packet_header_default" object instead of a "header_format_base" object bob Le dim. 6 janv. 2019 à 02:50, Cinaed Simson a écrit : > On 1/5/19 2:26 PM, Alban Meffre wrote: > > ok sorry my mistake i got "packet_header_default" and > > "

Re: [Discuss-gnuradio] HELP with "packet header parser"

On 1/5/19 2:26 PM, Alban Meffre wrote: > ok sorry my mistake i got "packet_header_default" and > "header_format_default" mixed up > bob The error message at the bottom indicates the wrong number arguments. digital.header_format_default('1101001110010001', 0) Try digital.header_format_defaul

Re: [Discuss-gnuradio] HELP with "packet header parser"

ok sorry my mistake i got "packet_header_default" and "header_format_default" mixed up bob Le sam. 5 janv. 2019 à 22:13, Alban Meffre a écrit : > hi all > > i try to figure out how to use the "packet header parser" block > as a formatter i use > "digital.header_format_default('1101001110010001',

[Discuss-gnuradio] HELP with "packet header parser"

hi all i try to figure out how to use the "packet header parser" block as a formatter i use "digital.header_format_default('1101001110010001', 0)" when i launch i get the error " Traceback (most recent call last): File "/Users/alban/gnuradio/top_block.py", line 146, in main() File "/User

Re: [Discuss-gnuradio] help: optimizing a fm broadcast flowchart. Getting multiple stations in a rtlsdr (Derek Kozel) (Michael Dickens)

sers] Segmentation fault commands to USRP with >>       gnuradio (Christoph Mayer) >>    6. Re: [USRP-users] Segmentation fault commands to USRP with >>       gnuradio (M?ller) >>    7. Receiving NOAA signals and passing to BB (Guilherme Theis) >> &g

Re: [Discuss-gnuradio] help: optimizing a fm broadcast flowchart. Getting multiple stations in a rtlsdr (Derek Kozel) (Michael Dickens)

Theis) > > > -- > > Message: 1 > Date: Thu, 6 Dec 2018 13:17:01 -0400 > From: Luis Roca mailto:lrocaigu...@gmail.com>> > To: discuss-gnuradio@gnu.org <mailto:discuss-gnuradio@

Re: [Discuss-gnuradio] help: optimizing a fm broadcast flowchart. Getting multiple stations in a rtlsdr (Derek Kozel)

I'm with Michael and Derek. However, since I did receive the image - and in general I avoid images like the plague - I did look at the image against my better judgement, and I have a couple of comments. You have 2 identical parallel branches - completely disable everything in the lower upper bran

Re: [Discuss-gnuradio] help: optimizing a fm broadcast flowchart. Getting multiple stations in a rtlsdr (Derek Kozel) (Michael Dickens)

> > Message: 1 > Date: Thu, 6 Dec 2018 13:17:01 -0400 > From: Luis Roca > To: discuss-gnuradio@gnu.org > Subject: Re: [Discuss-gnuradio] help: optimizing a fm broadcast > flowchart. Getting multiple stations in a rtlsdr (Derek Kozel) > Message-ID:

Re: [Discuss-gnuradio] help: optimizing a fm broadcast flowchart. Getting multiple stations in a rtlsdr (Derek Kozel)

Unless your host computer's CPU is way underpowered, I'm with Derek here: use polyphase filterbanks to channelize into 200 kHz bandwidth per channel, then have a bank of FM demodulators, one per channel. Output to files, or display, or whatever you need. - MLD On Thu, Dec 6, 2018, at 12:17 PM, Luis

Re: [Discuss-gnuradio] help: optimizing a fm broadcast flowchart. Getting multiple stations in a rtlsdr

Hi Luis, At least on my end I can't see an attachment. Since FM broadcast stations are regularly spaced the polyphase filterbank is a good choice for separating out each of the individual channels. You can then use the same demodulation set of blocks and file sink that you're (presumably) usi

[Discuss-gnuradio] help: optimizing a fm broadcast flowchart. Getting multiple stations in a rtlsdr

Thanks for this great software. We are tinkering with a setup for listening to radio and storing the streams as wavs. We have two challenges that we haven't been able to tackle satisfactorily. Any help would be appreciated. 1. What do we need in order to tune into as many stations as an rtlsdr c

Re: [Discuss-gnuradio] Help needed with message ports [success]

Hi Volker - You're welcome & so glad that we got the issue figured out! Which reminds me that I never put together a PR for the changes that would give programmers a clue that a hier2 block isn't meant to do actual "work". I'll add that to my queue & try to get it in before GRCon ... Cheers! - M

Re: [Discuss-gnuradio] Help needed with message ports [success]

Just to report the solution, as it me be usefull for others. My block was an hier2 block. Hier2 blocks can't handle messages directly, they only can serve as a proxy. So I added a gr::block with no inputs and outputs ( yes, this is possible, I did not know before ) that could handle the messa

Re: [Discuss-gnuradio] help

Hi Aruna, I’m not an expert, but I guess you haven’t set your DCMAKE_INSTALL_PREFIX to your GNURadio prefix. Here is what you may try: Use setup_env.sh to setup the environment Go to the gr-ieee802-11/build/ folder(I assume you have a build folder) Delete everything in the build folder In the bu

[Discuss-gnuradio] help

Dear Helpers! I am a student at TU Munich and I have started working on PlutoSDR project using GNU Radio. I have some doubts on the issue I am facing. Could you please help? I am trying to install the gnuradio on Kubuntu with gr-ieee802-11 and gr -foo as mentioned in the below link: htt

Re: [Discuss-gnuradio] Help needed with message ports

On Fri, Jul 27, 2018, at 6:23 AM, Müller, Marcus (CEL) wrote: > Awesome! Folks, this is the way I always hoped the community works. > Cheers to you! LOL thanks but maybe premature?! This issue is somewhat more complicated than I thought, mostly because I'm still learning how to actually use a c+

Re: [Discuss-gnuradio] Help needed with message ports

Awesome! Folks, this is the way I always hoped the community works. Cheers to you! On Thu, 2018-07-26 at 16:36 -0400, Michael Dickens wrote: > A quick followup on progress on this query: > > The issue is in lib/flowgraph.cc, where message connection edges are not > being used when counting conne

Re: [Discuss-gnuradio] Help needed with message ports

A quick followup on progress on this query: The issue is in lib/flowgraph.cc, where message connection edges are not being used when counting connections (just stream connection edges). So, the flattened flowgraph shows 1 connection (the stream one going out), but no connection is found (becaus

Re: [Discuss-gnuradio] Help needed with message ports

Hi Volker - OK thanks for the update. After rechecking my OOT example, I agree that this issue requires inheritance from a hier2_block class. Maybe that will help track down the issue... ? I know that the code for doing connections is pretty gnarly, so who knows? Anyway, worth poking at ... and

Re: [Discuss-gnuradio] Help needed with message ports

Hi Michael, thank you for your reply. Yes your clarification is correct. The block I'm trying is of type hier2_block. Meanwhile I found an older post https://lists.gnu.org/archive/html/discuss-gnuradio/2015-10/msg8.html describing the same problem. But the gnuradio code has been modified

Re: [Discuss-gnuradio] Help needed with message ports

Hi Volker - Just to clarify: You've added an -optional- input async message port to a block that currently does just streaming. If you -do not- try to connect to this new port, then everything works as desired & as before. If you -do- try to connect to the port then you get the runtime error "i

[Discuss-gnuradio] Help needed with message ports

Hi, I'm trying to add an message port to my  working oot module fcdproplus to be able to control the frequency by an message from a qtgui sink. I used the analog signal source as guide and implemented a message sink in the grc description, registered the in port, and defined  a handler funct

[Discuss-gnuradio] Help on event triggered OOT Block

Hello All, I am trying to develop an OOT block that will trigger a function when there is a change on any of the input of the block, i have been reading about input buffers and output buffers, and i tried something like, comparing the third position of the input buffer with the second one, and o

Re: [Discuss-gnuradio] Help on gnuradio

Hey, I had the same problem a few weeks back in a two channel scenario. I ended up writing a simple python 'gate' block that passes a configurable amount of samples for every pulse on the trigger input. It is super inflexible and hacky but should be fairly easy to modify. I quickly moved the

Re: [Discuss-gnuradio] Help on gnuradio

On 06/20/2018 01:05 PM, c...@origosat.com wrote: Hi, I am new to the gnuradio environment..so please forgive me... I have an USRP B200 and I am looking to save to a file I & Q samples of bursty, random (ALOHA) messages sampled at high rate, for furter processing (in a repeatable fashion). Of co

[Discuss-gnuradio] Help on gnuradio

Hi, I am new to the gnuradio environment..so please forgive me... I have an USRP B200 and I am looking to save to a file I & Q samples of bursty, random (ALOHA) messages sampled at high rate, for furter processing (in a repeatable fashion). Of course it is not possible to save 15--20 mminute

Re: [Discuss-gnuradio] GNURadio Help

N200 2018-06-14 8:58 GMT+03:00 Ivan Zahartchuk : > I'm still interested in the principle of the UHD_Source unit. > "Start continuous" tells the device to stream samples indefinitely. > "Stop continuous" tells the device to end continuous streaming. > "Num sams and done" tells the d

Re: [Discuss-gnuradio] GNURadio Help

I'm still interested in the principle of the UHD_Source unit. "Start continuous" tells the device to stream samples indefinitely. "Stop continuous" tells the device to end continuous streaming. "Num sams and done" tells the device to stream num sams and to not expect a future stream

Re: [Discuss-gnuradio] GNURadio Help

Hello, I see you are using an E310, now this seems to make a bit more sense as to what you are trying to do. Although you can use RFNOC to increase the processor ability to do FFT function, it is actually not needed for initial testing. In GNU radio, there are many ways to enhance your design, b

Re: [Discuss-gnuradio] GNURadio Help

Ivan, the E310 is a very special USRP as it not only requires you to understand radio, software, digital signal processing and development, but also embedded hardware development and efficiently also FPGA design. Are you *sure* you want to start with that? Without meaning to cause any offense, thi

Re: [Discuss-gnuradio] GNURadio Help

This is much more doable. May I ask why you want to buffer all the data in the radio? On Wed, Jun 13, 2018 at 9:06 AM, Ivan Zahartchuk wrote: > I want to process not 6GHz but 30 MHz at a time. Ie I read 30 MHz at a > frequency of 400 MHz (for example) then I do 30 MHz FFT and write them to > th

Re: [Discuss-gnuradio] GNURadio Help

I want to process not 6GHz but 30 MHz at a time. Ie I read 30 MHz at a frequency of 400 MHz (for example) then I do 30 MHz FFT and write them to the buffer. And so up to 6GHz. Then when the buffer is full, I transfer the data to the host machine (I use the USRP E310 board) to display the data. In f

Re: [Discuss-gnuradio] GNURadio Help

Hello. If I understand what you are saying correctly, you would like to process wide band data. And you mention 70 MHz to 6 GHz. Even with RFNOC there is a limitation on the amount of data you can process simultaneously, and that is about 200 MHz. There is no way possible to simultaneously proces

Re: [Discuss-gnuradio] GNURadio Help

I don't understand what you mean with "do the FFT and then transfer […] to the host machine": GNU Radio runs on the host machine, so whatever processing you do already happens on the host machine. Assuming this is just a small problem in expression, and you're doing all this on the same machine: W

Re: [Discuss-gnuradio] GNURadio Help

In the future, I would also like to use the RFNoC 2018-06-13 17:42 GMT+03:00 Ivan Zahartchuk : > I need to rebuild the frequency, do fft and then transfer the whole array > from 70 to 6GHz to the host machine. I do not quite imagine how you can > do this with standard blocks in gnuradio. > > > 20

Re: [Discuss-gnuradio] GNURadio Help

I need to rebuild the frequency, do fft and then transfer the whole array from 70 to 6GHz to the host machine. I do not quite imagine how you can do this with standard blocks in gnuradio. 2018-06-13 17:32 GMT+03:00 Müller, Marcus (CEL) : > Dear Ivan, > > you don't pass data to a block yourself.

Re: [Discuss-gnuradio] GNURadio Help

Dear Ivan, you don't pass data to a block yourself. You write a block that does a clearly-limited signal processing job, and use GNU Radio to connect that to other blocks: https://tutorials.gnuradio.org In your case, instantiating a USRP source in your block makes absolutely no sense, for exam

[Discuss-gnuradio] GNURadio Help

Hello. I'm trying to write a block in gnuradio for broadband reception. The main problem at the moment is to transfer data to the fft block. I'm new to python and so it's hard for me to figure this out.import numpy as np I need an array of data to pass to the gnuradio.fft.fft.vcc block from gnur

Re: [Discuss-gnuradio] Help with using gnuradio c++ api

Hi Snehasish, since this is defitnitely not your complete code, there's nothing we can do to help you :( Best regards, Marcus On Mon, 2018-04-02 at 19:13 +, Snehasish Kar wrote: > Hello > > I was trying to generate a flow graph using file source descriptor and a file > sink. But after gene

[Discuss-gnuradio] Help with using gnuradio c++ api

Hello I was trying to generate a flow graph using file source descriptor and a file sink. But after generating the output instead of writing to the file, it prints the output in the screen. Below is the code. Please let me know where I am going wrong. gr::blocks::file_descriptor_source::sp

Re: [Discuss-gnuradio] Help needed to install GR-GSM package

On 02/20/2018 08:34 AM, Shrishailayya M Hiremath wrote: > package libosmocore: > Unable to fetch recipe libosmocore > PyBOMBS.install_manager - ERROR - Error installing package libosmocore. > Aborting. This may be a firewall issue. -- M ___ Discuss-g

Re: [Discuss-gnuradio] Help with gr::io_signature::makev

Yes indeed, it was a C++11 issue! Thanks On 13 January 2018 at 11:16, Sakthivel Velumani wrote: > I think you are using an older standard of C compiler. The C11 does not > allow to initialise a vector using {}. But this doesn't matter as it > compiled successfully. Try initialising the vector wi

Re: [Discuss-gnuradio] Help with gr::io_signature::makev

I think you are using an older standard of C compiler. The C11 does not allow to initialise a vector using {}. But this doesn't matter as it compiled successfully. Try initialising the vector with its constructor and then assign the values. It doesn't make sense but still no harm in trying. Regard

Re: [Discuss-gnuradio] Help with gr::io_signature::makev

The input signature is not a problem here. For gr::io_signature::*make*(2, 2, sizeof(gr_complex)), i.e. when using make, size of all input items is same. Its is different when using make2, make3 and makev. On 13 January 2018 at 01:23, Sakthivel Velumani wrote: > Hi Sumit, > > You have given n

Re: [Discuss-gnuradio] Help with gr::io_signature::makev

Hi Sumit, You have given no of input streams as 2 but mentioned size of item for only one. This may be the source of the error. Try correcting it and let us know. Regards, Sakthivel On Fri, Jan 12, 2018 at 10:37 PM, sumit kumar wrote: > Hi, > > I am trying to use *gr::io_signature::makev* for

[Discuss-gnuradio] Help with gr::io_signature::makev

Hi, I am trying to use *gr::io_signature::makev* for my output signature in my bar_impl.cc bar_impl::bar_impl(int offset, int freq) : gr::block("bar", gr::io_signature::make(2, 2, sizeof(gr_complex)), * gr::io_signature::makev(4, 4, out_vect))* For that in th

Re: [Discuss-gnuradio] Help needed regarding implementing spring mass system in GRC

Hi Afaq - Actually one could replicate this simulation in some capacity using async messages -- for all blocks, or just for the feedback portion. Async messages have no restriction on feedback as does streaming data -- see, e.g., the OFDM header/payload demux block in gr- digital & the related OFDM

Re: [Discuss-gnuradio] Help needed regarding implementing spring mass system in GRC

Hey Afaq, Unfortunately, GNURadio doesn't allow for signal feedback the way Simulink does. You can do feedback *within* a block, but that probably defeats the flexibility you were seeking? - Dan On Mon, Dec 4, 2017 at 9:33 AM Afaq Ahmed wrote: > Hello, > I want to implement spring mass system

[Discuss-gnuradio] Help needed regarding implementing spring mass system in GRC

Hello, I want to implement spring mass system with PID controller of example mentioned in following link [ http://ctms.engin.umich.edu/CTMS/index.php?example=Introduction§ion=ControlPID ] I want to create a flow graph exactly as given in the figure "Spring_mass_simulink" . Can you please help me

Re: [Discuss-gnuradio] Help in adding new block to existing OOT module

Yes just 1 minute after posting this mail I realized that hyphen in include guard is the root. I always created my own OOT, never added block in existing OOT, good learning for me ! I understood, the "make install" should place the public header in /include. Yes the CMakelist.txt was updated by t

Re: [Discuss-gnuradio] Help in adding new block to existing OOT module

Hi Sumit, On Tue, 2017-11-14 at 17:13 +0100, Sumit Kumar wrote: > Added a new block test_block_cf to existing module gr-ieee-80211 > > >> gr_modtool add test_block_cf Correct way to do it! > It added test_block_cf_impl.cc and test_block_cf_impl.h in /lib and > test_block_cf.h in /include/ieee

[Discuss-gnuradio] Help in adding new block to existing OOT module

Hi, *I went inside the folder * >> cd gr-ieee-80211 *Added a new block test_block_cf to existing module gr-ieee-80211* >> gr_modtool add test_block_cf It added test_block_cf_impl.cc and test_block_cf_impl.h in /lib and test_block_cf.h in /include/ieee802_11 Now I did the usual stuff in my wor

Re: [Discuss-gnuradio] Help with Airspy Mini

Hi Andrew, yes you certainly can, but "GNU Radio is like a spectrum analyzer" isn't really true – think of GNU Radio itself rather as a big box of nice building blocks to put together one software spectrum analyzer, or a DVB-T transmitter, or a radar, or… What you can do, for example, is for

Re: [Discuss-gnuradio] Help with Airspy Mini

Can I ask a silly question Can you use gnu radio as a filter sweeper Perhaps hack rf sig gen in harmony with rtl sdr to sweep a filter or preamp for gain response Since gnu radio is like a spectrum analyser Andrew Sent from my iPhone > On 28 Oct 2017, at 1:15 am, Marcus Müller wrote: > >

Re: [Discuss-gnuradio] Help with Airspy Mini

Thank you sir Sent from my iPhone > On 28 Oct 2017, at 1:15 am, Marcus Müller wrote: > > If you want to first manually correct, add a Qt GUI Range block, give it the > ID "dopplercorrection", and allow a start and stop of +- what you > expect. Set the default value to zero. > > Then,

Re: [Discuss-gnuradio] Help with Airspy Mini

If you want to first manually correct, add a Qt GUI Range block, give it the ID "dopplercorrection", and allow a start and stop of +- what you expect. Set the default value to zero. Then, add a  "rotator" block, and put in the "Phase Increment" field the value you want to advance the phase of

Re: [Discuss-gnuradio] Help with Airspy Mini

I am up to the stage of adding fft and scope sinks and resamplers and sliders Need to explore the blocks Curious about doppler correction Andrew Sent from my iPhone > On 27 Oct 2017, at 11:35 pm, Marcus Müller wrote: > > Glad you're getting engaged with SDR, and especially GNU Radio! >

Re: [Discuss-gnuradio] Help with Airspy Mini

Glad you're getting engaged with SDR, and especially GNU Radio! So, if you're completely new to GNU Radio, I'd recommend the "official Guided Tutorials": http://tutorials.gnuradio.org They start out rather smooth, and you can "stop" at any point (e.g. if you don't actually want to learn how t

Re: [Discuss-gnuradio] Help with Airspy Mini

Thanks Marcus I can now start learning gnu radio Andrew Sent from my iPhone > On 27 Oct 2017, at 10:09 pm, Marcus Müller wrote: > > Hi Andrew, > > most SDR devices are most easily usable in GNU Radio with the "Osmocom > Source" block, contained in gr-osmosdr. > > BUT: to get an gr-osmosdr

Re: [Discuss-gnuradio] Help with Airspy Mini

Hi Andrew, most SDR devices are most easily usable in GNU Radio with the "Osmocom Source" block, contained in gr-osmosdr. BUT: to get an gr-osmosdr with the AirSpy driver, you need to, in this order 1. Install GNU Radio and libairspy 2. build gr-osmosdr from source (Do NOT install it as bina

[Discuss-gnuradio] Help with Airspy Mini

Hello Can some one tell me please what I need to do to use my AirSpy Mini as a source in GRC. What do I need to install ? The only other SDR I have is RTL-SDR and HackRF and Funcube Dongle Want to start learning packet radio Andrew Rich VK4TEC ___

Re: [Discuss-gnuradio] Help understanding AX.25 encoding and tagged streams

On 08/26/2017 05:36 PM, Robert McGwier wrote: > At one time rational resampling meant that the interpolation and > decimation were each integers so the rate change is the ratio of two > integers and thus rational. All integers are rational. But not all rationals are integers. 1,2,3, are integers

Re: [Discuss-gnuradio] Help understanding AX.25 encoding and tagged streams

At one time rational resampling meant that the interpolation and decimation were each integers so the rate change is the ratio of two integers and thus rational. If one or more of your inputs is fractional I believe you need the arbitrary rate resampler. Bob On Aug 15, 2017 10:16 PM, "Cinaed Si

Re: [Discuss-gnuradio] Help understanding AX.25 encoding and tagged streams

On 08/14/2017 07:14 AM, Jack White wrote: > Hello, knowledgeable ones, > > I need to put together testbed satellite uplink using AX.25 encoding and > GMSK modulation. The flowgraph source is an Ettus USRP X310 with a > WBX-120 daughterboard. > > The flowgraph is a modification of one used with a

Re: [Discuss-gnuradio] Help with building a VHF-UHF SDR application on Debian Jessie (using Gnuradio 3.7.10)

Hi Cinaed, Respectfully, I believe there is a misunderstanding. The application is called qradiolink and it transmits and receives digital voice/data using either Codec2 or Opus for audio. I run it on an Android phone for portable SDR experimentation in various UHF/SHF bands. This is amateur rad

Re: [Discuss-gnuradio] Help with building a VHF-UHF SDR application on Debian Jessie (using Gnuradio 3.7.10)

Hi Maitland, Thanks for the detailed reply! I will adjust my include paths accordingly. On my system, it seems that libqwt-dev cannot be installed in parallel with libqwt5-qt4-dev. Nevertheless, it is not an issue for my build, since the libs coexist and linking is correct. It is only a header

Re: [Discuss-gnuradio] Help with building a VHF-UHF SDR application on Debian Jessie (using Gnuradio 3.7.10)

On 06/19/2017 02:39 PM, Adrian Musceac wrote: > Hi Cinaed, > Thanks for your prompt response and the qt4 clarification. I will settle for > qt4 now as building gnuradio against qt5 would be too much effort. If you want to port gnuradio to qt5, you would need to checkout the entire source tree fro

Re: [Discuss-gnuradio] Help with building a VHF-UHF SDR application on Debian Jessie (using Gnuradio 3.7.10)

Hi Cinaed, Thanks for your prompt response and the qt4 clarification. I will settle for qt4 now as building gnuradio against qt5 would be too much effort. But the header issue still stands, it looks like the include path is wrong, at least on Debian. I don't know if this is just a Debian package

Re: [Discuss-gnuradio] Help with building a VHF-UHF SDR application on Debian Jessie (using Gnuradio 3.7.10)

On 06/19/2017 01:05 PM, Adrian Musceac wrote: > Hi fellow Debian hams and Gnuradio experts, > > I am currently trying to build a SDR experimental application based on > Gnuradio for digital voice and data communications in the amateur radio > VHF-UHF bands [1][2]. I am using Gnuradio 3.7.10 on Deb

[Discuss-gnuradio] Help with building a VHF-UHF SDR application on Debian Jessie (using Gnuradio 3.7.10)

Hi fellow Debian hams and Gnuradio experts, I am currently trying to build a SDR experimental application based on Gnuradio for digital voice and data communications in the amateur radio VHF-UHF bands [1][2]. I am using Gnuradio 3.7.10 on Debian GNU/Linux from jessie-backports. I ran into some pro

Re: [Discuss-gnuradio] Help needed to obtain AM Depth of Modulation

Dear Matt, > - If I set the generator at 50% modulation depth and I simply plot the > source input, I get this result , which > is different from the graph from Wikipedia Looks like clipping on either the TX or RX side. Reduce the output amplitude of the signal

Re: [Discuss-gnuradio] Help needed to obtain AM Depth of Modulation

I've been doing some tests, and something strange is happening: - If I set the generator at 50% modulation depth and I simply plot the source input, I get this result , which is different from the graph from Wikipedia

Re: [Discuss-gnuradio] Help needed to obtain AM Depth of Modulation

Wow! Thanks for taking the time to put this together. I'll try following those steps and let you know how it goes. Thanks again! -- View this message in context: http://gnuradio.4.n7.nabble.com/Help-needed-to-obtain-AM-Depth-of-Modulation-tp63826p63839.html Sent from the GnuRadio mailing list

Re: [Discuss-gnuradio] Help needed to obtain AM Depth of Modulation

You are totally right. I need it to be RF input independent, so I'll try following your advice. Thanks a lot! -- View this message in context: http://gnuradio.4.n7.nabble.com/Help-needed-to-obtain-AM-Depth-of-Modulation-tp63826p63838.html Sent from the GnuRadio mailing list archive at Nabble.co

Re: [Discuss-gnuradio] Help needed to obtain AM Depth of Modulation

I would start with source -> low pass filter(complex) - rational-resampler(complex) -> am demod -> number sink(float). I have never used the AM Demod block and I have never calculated the Modulation Index for AM. But it does appear you have a plumbing problem. I would start with changing the

Re: [Discuss-gnuradio] Help needed to obtain AM Depth of Modulation

On Wed, May 10, 2017 at 3:31 AM, Matt Cooper wrote: > Hi guys! > > I am trying to calculate the Depth of Modulation > of > an AM signal using GNU Radio, but I just can't make it work. > ... > - In GNU Radio, I'm using this

[Discuss-gnuradio] Help needed to obtain AM Depth of Modulation

Hi guys! I am trying to calculate the Depth of Modulation of an AM signal using GNU Radio, but I just can't make it work. To test, I am using a Rode & Schwarz SMB100M signal generator connected to a USB SDR receiver

[Discuss-gnuradio] Help wanted for very exotic project

Hi, we are a non profit group of enthusiasts following an alternative physical concept of a unified theory, called BSM-SG (Basic Structures of Matter - Supergravitation Unified Theory). If you are interested in a bit hardware tinkering and data analysis in exotic projects, we could need some peop

Re: [Discuss-gnuradio] help me to design a hierarchical block

Thank you Marcus. I was overlooking the input fields in the property settings for the hier block. As usual the answer seems simple once it is explained. -Ed On Mon, Jul 25, 2016 at 4:36 PM, Marcus Müller wrote: > For lazy people: This is about generating hier blocks with GRC. > > Ed, you're d

Re: [Discuss-gnuradio] help me to design a hierarchical block

For lazy people: This is about generating hier blocks with GRC. Ed, you're doing it right already, I think. When you use that hier block somewhere, you get an input field in the hier block properties that should set the avgLength variable as available in you flowgraph. That should be all! If it d

Re: [Discuss-gnuradio] help me to design a hierarchical block

I 'thought' that my reply would appear threaded within the discussion I was reading ( https://lists.gnu.org/archive/html/discuss-gnuradio/2013-02/msg00336.html) my apologies for any confusion On Mon, Jul 25, 2016 at 3:35 PM, Ed Coleman wrote: > This was a very helpful introduction to hierarchica

Re: [Discuss-gnuradio] help me to design a hierarchical block

This was a very helpful introduction to hierarchical blocks. One thing I am unclear on is how a parameter in a hier block is controlled via the top block. For example suppose I have a moving average block inside my hier block and I want the number of averages to be defined from the top block. Wit

Re: [Discuss-gnuradio] Help - Tutorial: PSK Symbol Recovery

Hi Marcus, Ahhh ok It makes sense! Thank so much! Best regards, José 2016-05-28 14:59 GMT-03:00 Marcus Müller-3 [via GnuRadio] < ml-node+s4n60229...@n7.nabble.com>: > Hi Jose, > > so, the flow graphs in the tutorial do timing and frequency > synchronization, but what they don't do is any ki

Re: [Discuss-gnuradio] Help - Tutorial: PSK Symbol Recovery

Hi Jose, so, the flow graphs in the tutorial do timing and frequency synchronization, but what they don't do is any kind of framing: you just won't know if the first bit you decoded is a the first bit of a byte, or from somewhere in the middle; that's what you're seeing here, probably! Best regar

[Discuss-gnuradio] Help - Tutorial: PSK Symbol Recovery

Hi all, I am studying the tutorial 7: PSK Symbol Recovery. For it, I am using the mpsk_stage6.grc example flowgraph. But I am trying to simulate a transmition of a txt file. I can see the decoded signal on the scope perfectly but I would like to save this received file. According the tutorial, aft

[Discuss-gnuradio] Help in FEC example + ofdm modulation

Hello colleagues, I need some help! I am studying the FEC examples and for it I am using the "fecapi_tagged_encoders.grc". I can understand this example but I have problems when I try to simulate some modulation and transmission. I don't receive any information and this is showed in reports panel.

Re: [Discuss-gnuradio] Help required for tunnel.py with two USRPs

Hello Henning, To make it easy to update UHD versions Ettus has a private package archive, PPA, for Ubuntu. You can update your UHD using the following commands. You will still need to recompile GNU Radio (most accurately gr-uhd) to make it compatible with the newer UHD's interface. # Remove exis

Re: [Discuss-gnuradio] Help required for tunnel.py with two USRPs

The UHD you're using is 3.5.5. That is much older than the B200, so this can't work. You will have to use a newer version of UHD, then re-compile GNU Radio to work with that, and then try again. I presume you installed UHD and GNU Radio through your Linux Distro's package manager? (Guessing from t

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