[Discuss-gnuradio] gr-fec Viterbi example

I am currently investigating LRPT (as used by METEOR-M2) and am stuck with the Viterbi decoder. While trying to use https://github.com/gnuradio/gnuradio/blob/master/gr-fec/lib/viterbi/decode.cc which implements /* The two generator polynomials for the NASA Standard K=7 code. * Since these polyno

Re: [Discuss-gnuradio] 2 USRP TX channel from 2 Message strobe does not work

Hi, Can anyone please help me on this? Ayaz From: Ayaz Mahmud Sent: Sunday, August 5, 2018 2:00 PM To: discuss-gnuradio@gnu.org Subject: 2 USRP TX channel from 2 Message strobe does not work Hi, Flow graph: Message strobe --> Ran

[Discuss-gnuradio] installing gnuradio using pybombs

I am trying to install gnu radio using pybombs. However, I got the following error: PyBOMBS - INFO - PyBOMBS Version 2.3.2 PyBOMBS.auto-config - INFO - Using config file: None Traceback (most recent call last): File "/usr/local/bin/pybombs", line 11, in load_entry_point('PyBOMBS==2.3.2', 'c

Re: [Discuss-gnuradio] QPSK Modulation and Demodulation Question

Hey, I only have my phone available right now so I can’t really check but from what I can see, you got a little problem with your decimation factors. Your initial sps (samples per symbol) is 4 and you reduce it to 2 sps in the clock recovery process (output sps = 2). However, in you equalizer y

Re: [Discuss-gnuradio] USRP Source Block error 255

On 08/07/2018 02:01 PM, Marcus D. Leech wrote: On 08/07/2018 04:47 PM, Chad Spooner wrote: On 08/07/2018 12:01 PM, Marcus D. Leech wrote: On 08/07/2018 02:54 PM, Chad Spooner wrote: All: I'm having trouble with some flowgraphs under Ubuntu 18.04.1. I recently set up a HP ZBook G3 with tha

[Discuss-gnuradio] latency to detect sync marker with "correlator block"

Hi everyone, I am builing a bpsk receiver, I can receive my signal, demodulate it, find the marker of my packet (0x1acffc1d) and read it. Everything looks fine excpet when I try to find the marker of the packet. I have a delay that I don’t anderstand. I send a message every second and because o

[Discuss-gnuradio] Packet Decoder not working

Hi, As my project groupe advance more through our FSK demodulator flow we want to try make the flow able to make most of the signal processing. This means that right now we want to be able to find our sync word and get the rest of the data. So ideally we would like to have: ---

Re: [Discuss-gnuradio] Generating hexadecimal data and printing directly on the terminal

Hi Marcus, This solved my problem, thank you! I also got another solution by using a TCP sink (server mode) and then using netcat to connect to it. After I run my `python -u myflow.py -options` I can see my output by doing a simple `nc my_ip my_port | hexdump`. I thank you again. Best regards,

Re: [Discuss-gnuradio] Generating hexadecimal data and printing directly on the terminal

Hi Guilherme, as I explained in that StackOverflow post I wanted to link to and then forgot: https://stackoverflow.com/questions/51743074/gnu-radio-companion-how-ca n-i-convert-float-stream-to-be-printed-to-console/51753814#51753814 add a file sink to your flow graph which writes to /tmp/randomn