From 1f0939cab2be15e35201991dc6158e474a5e470a Mon Sep 17 00:00:00 2001 From: proto17 Date: Tue, 12 Apr 2022 21:40:23 -0400 Subject: [PATCH] Updated Home (markdown) --- Home.md | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Home.md b/Home.md index 837cacf..57e094c 100644 --- a/Home.md +++ b/Home.md @@ -172,6 +172,11 @@ plot(10 * log10(abs(samples).^2)); In my case the plot looks like this ![image](https://user-images.githubusercontent.com/4240543/163081765-bdb3debf-0363-465d-8b1e-92d645d0ddd0.png) +Plotting in log scale to make the small variations stick out, and to get a sense of the signal to noise ratio of the recording. +You should see nothing, and then a signal appearing, and then dissapearing before the end of the samples. If you have caught the signal too early, or don't see the end of it, then you need to go back to `baudline` and double check your measurements. If it's still not working, make sure that when you open the file in `baudline` that you specify the correct sampling rate. If that value is wrong, then the time information that `baudline` gives you will be incorrect as well. + +At this point you have successfully extracted a single burst. Now it's time to move on to figuring out exactly which sample is the first sample of the burst. [4] https://github.com/gnuradio/gnuradio/blob/main/gr-utils/octave/read_complex_binary.m + [5] https://github.com/proto17/dji_droneid/blob/main/matlab/read_complex_floats.m \ No newline at end of file