Re: VOR DEMODULATION
I should have acknowledged that the article I wrote is derived from the presentation of Antoine Blais from the French Civial Aviation University at https://www.youtube.com/watch?v=apf5fvGSYHc&t=201s who does not share GNU Radio flowgraphs but all the underlying principle of angle of arrival measurement in his excellent presentation. Best, JM > The article is in French but GNU Radio's flowcharts are international > (bottom of page 1 for AM, Fig 6 for AM and > FM): http://jmfriedt.free.fr/hackable_vor.pdf I can translate to English if > interested (or ask a chatbot to translate > since this seems to be the trend now). > > Best, JM > > > I am working on vor signal reception using USRP N210 in GNU Radio > > Companion, Could you please help me how to do its demodulation > > (suggest me some blocks) as it has both AM and FM modulated signal. > > I am doing this on Windows 10, it is possible to do phase comparison > > without using python block. > > > > I would greatly appreciate any guidance or suggestions you can > > provide to help me. > > > > Thank you for your assistance. > > > > Best regards, > > > > Muhammad Anas > > > -- JM Friedt, FEMTO-ST Time & Frequency, 26 rue de l'Epitaphe, 25000 Besancon, France
VOR DEMODULATION
Dear GNU Radio Community, I am working on vor signal reception using USRP N210 in GNU Radio Companion, Could you please help me how to do its demodulation (suggest me some blocks) as it has both AM and FM modulated signal. I am doing this on Windows 10, it is possible to do phase comparison without using python block. I would greatly appreciate any guidance or suggestions you can provide to help me. Thank you for your assistance. Best regards, Muhammad Anas
Re: VOR DEMODULATION
The article is in French but GNU Radio's flowcharts are international (bottom of page 1 for AM, Fig 6 for AM and FM): http://jmfriedt.free.fr/hackable_vor.pdf I can translate to English if interested (or ask a chatbot to translate since this seems to be the trend now). Best, JM > I am working on vor signal reception using USRP N210 in GNU Radio > Companion, Could you please help me how to do its demodulation > (suggest me some blocks) as it has both AM and FM modulated signal. I > am doing this on Windows 10, it is possible to do phase comparison > without using python block. > > I would greatly appreciate any guidance or suggestions you can > provide to help me. > > Thank you for your assistance. > > Best regards, > > Muhammad Anas -- JM Friedt, FEMTO-ST Time & Frequency, 26 rue de l'Epitaphe, 25000 Besancon, France
Re: VOR DEMODULATION
Thanks, I'll check it out! On Fri, Jul 19, 2024, 10:24 AM jmfriedt wrote: > I should have acknowledged that the article I wrote is derived from the > presentation of Antoine Blais from the French Civial Aviation University > at https://www.youtube.com/watch?v=apf5fvGSYHc&t=201s > who does not share GNU Radio flowgraphs but all the underlying > principle of angle of arrival measurement in his excellent presentation. > > Best, JM > > > The article is in French but GNU Radio's flowcharts are international > > (bottom of page 1 for AM, Fig 6 for AM and > > FM): http://jmfriedt.free.fr/hackable_vor.pdf I can translate to > English if interested (or ask a chatbot to translate > > since this seems to be the trend now). > > > > Best, JM > > > > > I am working on vor signal reception using USRP N210 in GNU Radio > > > Companion, Could you please help me how to do its demodulation > > > (suggest me some blocks) as it has both AM and FM modulated signal. > > > I am doing this on Windows 10, it is possible to do phase comparison > > > without using python block. > > > > > > I would greatly appreciate any guidance or suggestions you can > > > provide to help me. > > > > > > Thank you for your assistance. > > > > > > Best regards, > > > > > > Muhammad Anas > > > > > > > > > > -- > JM Friedt, FEMTO-ST Time & Frequency, 26 rue de l'Epitaphe, 25000 > Besancon, France >
Making a VLF SSB receiver
Hi everyone ! Long story short, in the context of a broader project I am attempting to recreate on GNUradio an SSB receiver for VLF, meant to function with an ultrasonic hydrophone. The goal here is to demodulate everything between 20 and 40khz (or higher, with a similar bandwidth) down to between 0 and 20. Basically the same as a bat detector or a surface-diver communication device. A few colleagues and I made a flowgraph by copying and adapting the SSB receiver from the GNUradio tutorial ( https://wiki.gnuradio.org/index.php/Simulation_example:_Single_Sideband_transceiver#The_Weaver_method_of_SSB_demodulation). It works, but it doesn't really do what we exactly want and we are struggling to get it to work that way, as we're unfamiliar with some of the GNUradio terminology and online tutorials tend to be unclear. How would you change the flowgraph to work the way we seek to ? I noticed in particular that this version has a fine tuning option which we believe to be superfluous (with a 17.5khz carrier), and a 16khz carrier. Thanks a lot ! ANDREWRandytestRXmodified_copy-1 (1).grc Description: Binary data
Making a VLF SSB receiver
Hello Julian - It is unclear as to what is not working for you, so it is kind of hard to suggest improvements. In situations like these it is important to have a test signal to 'play around with' so you can study and understand the issues more fully. I would either, 1) Record one or more sample signals for later playback into your processing flowgraph. or 2) Make a flowgraph that generates a test signal that you can then pass into your signal processing flowgraph. Then you can play the test signals and go block by block of your signal processing flowgraph to understand what is going on. Hope this helps Steve Hageman
[GSoC] FEC week 7 blog post
Hi all, Just posted my blog for this week: https://kaylacomer.github.io/blog/. I will not work on the project next week, as I had something come up, but I am planning to add another week on to the end of the coding period. Best, Kayla
