Changes

In the picture below we can see a measurement using a -T 600 modulation over a wall about 2m distance from radar. As we will see later, modulation parameters can be changed, in this case we have selected a modulation ramp with a duration of 600us. Considering that the time to get 2048 samples with the default modulation is 3,471ms and we can see about 20 periods of the sinusoidal signal this means that the dominant sinus shown below is about 5,760KHz frequency. The frequency of the IF radar signal is proportional to the distance from the radar to the target (in this case the wall).

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Why I am getting this weird signal? It has no sense, my Radar does not works!

No. Please, be patient, this is completely normal, your radar works well. If you are getting a signal like this or even still more strange this means that you are detecting different objects. This signal is the result of adding different sinus waves with different frequencies resulting on an apparently noisy signal but in fact is a typical IF radar signal on a multitarget environment. Our main objective now is try to get a clear signal from a single target to start learning with the radar, so please try to slightly change the radar orientation in order to get only a single reflection, or if you are on a small room, try to go to a better scenario, on a wider room with few objects or simply outside close to a wall.<br>