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eapbg #59 Intro to GNU Radio Companion, reading a key fob with SDR
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- Опубликовано: 22 июн 2019
- Electronics and Programming Beginners Guide
www.eapbg.com
A look into software defined radios (SDR). An introduction to GNU Rdio companion. Reading the data from a cars key fob that uses frequency shift keying (FSK) and Manchester coding.
great content, thanks for sharing
The "Zero-String" is an O(verflow)-String and means Overflow. Input data couldn't be processed.
But nice viceo all in all
Osmocom Scource and RTL-SDR source seems to be specific to the Windows distro. I'm running GNU Radio Companion under MacOS. Does anybody know if i can these sources also under MacOS?
Anybody knows how to decode and analyze Manchester encoding with GNU Radio Companion?
Thanks for the videos. What's the difference between filtering before or after the demodulatiom?. Thanks again :)
You would not want to filter before demodulation because the signal would be in the complex domain. After demodulation the signal only has magnitude and is easy to filter.
Does anybody know if there is a specific GNU Radio Companion forum where i can discuss questions. I only found newsgroups, but they are a kind of confusing.
an hour and half video?
Hi eapbg, I am learning GNU Radio and I find this example very good. The website is not accessible, where can I download the flowgraph ? Thanks
I do not have the full projects available. I found that importing a full project in GNU Radio does not work well. I can give you the python code from my custom blocks.
eapbg.s3-us-west-2.amazonaws.com/Video+59+Python+Code.py
eapbg.s3-us-west-2.amazonaws.com/Video+60+Python+Code.py
Nice video, try to make the flow chart gnu radio, but i'am missing the block Custom data decoder? I' m using the latest version 3.18..
The customer data decoder is a python block with customer code inside.
With all due respect, if you're going to teach something like this. Please don't throw in parameters from memory. Please show how you came up with them. A project that is already complete, is only partially useful to us, that are just learning. Otherwise, good video. Just explain what you're doing, and why. For example, the FIR filter. where did you come up with the End of Pass Band and Start of Stop band. Without knowing where you came up with those number, puts the rest of us -- that know how to do it -- at a pause in our learning, because we can't go any further. Thanks brother.
I'm implementing a low pass filter. The FIR filter designer needs to know where the pass band ends. This is were we want no rejection. Where the stop band begins. From here we want to reject frequencies. The two frequencies define the transition zone where the rejection starts (at the end of pass band) and where the rejecection reaches maximum ( at the start of the stop band). The stop band attenuation is how much rejection you want.
@@eapbg Hi brother. Thanks a lot for the explanation. I really appreciate you taking time out to provide this. :-) Have a great one.
Anybody knows how to decode and analyze Manchester encoding with GNU Radio Companion?