7/11/2023 0 Comments Gnuradio morse decoderIn the doc, I see that this block output is float, Decimating FIR Filter is configured as Float => Float type, so I don't understand why gr complains. Now, considering that Morse has been invented in the 1830s, you can imagine it is not quite suitable for modern computers: While Morse code has been made to be easily translatable to. Net won’t run well if at all under Wine Interfacing your radio through USB ports to Wine does not work well either. Powerful and recommended by our members) Winlink QTEL (cross platform application) Other comments Running software written in C or for. Then I see that gr complains about an error with Quadrature Demod block : Block - analog_quadrature_demod_cf_0 - Quadrature Demod(analog_quadrature_demod_cf): Source - out(0): Port is not connected. Morse (command line) Morse Machine (GUI interface. There seemed to be no output from the DSD block, so I tried to reduce the flow to the strict minimum : To be compatible with 3.7, I'm on 559335d githash (I will eventually merge the changes of latest dsd, when I get my flow working).įirst problem I met, was that there is no demo grc provided with argilo fork of gr-dsd, so I searched some example elsewhere and found robotastic older fork ( robotastic/gr-dsd) But as telive seems to be only compatible with gnuradio 3.7, not above, I need other components compatible with this version too.įrom what I've found so far, the most up to date component to listen to DMR is argilo gr-dsd ( argilo/gr-dsd). I'm trying to build a gnuradio flow to listen both on some DMR channels and some Tetra, all the channels are in the range of my rtl-sdr v3 dongle.Īs the flow for telive is ready, I'm starting with a gr-dsd only flow. What do I need to do next after 2.First, I need to say that I'm a beginner with GNU Radio, so I'm perhaps doing many things wrong, sorry in advance ! How can I use carrier recovery blocks when my signal is real? Summarizing everything up, there are several questions:Īm I on the right way to decode RDS signal? software defined radio - Receiving and decoding RDS in GnuRadio - Amateur Radio Stack Exchange Receiving and decoding RDS in GnuRadio Ask Question Asked 3 years ago Modified 1 year, 10 months ago Viewed 1k times 2 I'm new in radio, so I started with seemingly easy task - receive and decode RDS data. ![]() I tried to use Hilbert filter, but seems that is wrong. but an automatic transponder might be relatively easy to decode just find the shortest reasonable 'dit', everything significantly longer is a. Is there any example that shows how to do it. The latch bit stops th e print ing decoder until the decoder is again started by the next release element. I want to design a GNU Radio project to extract the information of a VOR signal, then find the angle to the north and the Morse code of the station. Also these blocks have complex inputs but after WBFM receiver the signal is real. The 5 information bits are immediately followed by a stop or latch bit lasting a minimum of 1.42 element lengths. I tried to use costas loop, PLL carrier Tracking and PLL ref out blocks to recover this 57kHz carrier but I couldn't get any decent output after 2.4kHz low pass filter. I tried to apply a part of this scheme in GnuRadio, so I have this:Īs you can see I took 57kHz signal source to shift RDS spectrum to lower frequencies as in the standard, but what really confuses me is that in standard they use subcarrier recovery module.Īs I understand if I don't use subcarrier recovery there will be a phase error in 2.4kHz signal so further demodulating will be impossible. I really would love to see how people actually do this in digital systems. I have made a Gnuradio Flowgraph in order to demodulate Bluetooth signal and I am trying to decode visualy the packets by searching a Bluetooth frame on a binary file. So according to standard RDS receiver looks this way: I am currently working on a project which aim to detect Bluetooth and decode Bluetooth packets (I use a Hack RF One to make the detection). I use GnuRadio to understand the concept of working with RF signals. Then you must apply on the raw file the proper decoder: multimon-ng -a MORSECW -t raw file.raw How to AFSK First convert to raw sound file (sampling frequency 22050Hz) using sox sox -t ogg file -r 22050 -t raw file.raw soxopts Then use multimon-ng with AFSK1200 decoder multimon-ng -t raw -a AFSK1200 file. software defined radio - Receiving and decoding RDS in GnuRadio - Amateur Radio Stack Exchange Receiving and decoding RDS in GnuRadio Ask Question Asked 3 years ago Modified 1 year, 10 months ago Viewed 1k times 2 Im new in radio, so I started with seemingly easy task - receive and decode RDS data. ![]() I'm new in radio, so I started with seemingly easy task - receive and decode RDS data.
0 Comments
Leave a Reply. |