---
title: "FMCW add-on: Catching Movements with a Simple Arrangement of Range-FFT, Threshold and PPI (Video)"
description: In this short video we visualize movements of a person in front of a training radar. We apply range FFT, source suppression, a threshold and a PPI. We also look at the movements in an A-Scope.
---

[SkyRadar Blog | Radar Training Systems Online Radars - SkyRadar ](https://www.skyradar.com/blog)

# [FMCW add-on: Catching Movements with a Simple Arrangement of Range-FFT, Threshold and PPI (Video)](https://www.skyradar.com/blog/fmcw-add-on-catching-movements-with-a-simple-arrangement-of-range-fft-threshold-and-ppi-video)

 Written by [Ulrich Scholten, PhD](https://www.skyradar.com/blog/author/ulrich-scholten-phd) | Feb 18, 2022

In this short video we visualize movements of a person in front of a training radar. We apply range FFT, source suppression, a threshold and a PPI. We also look at the movements in an A-Scope.

To do the digital signal processing we used our DSP and visualisation environment FreeScopes (the setting includes the modules [FreeScopes Basic I and](https://www.skyradar.com/en/8ghz-radar-training-system/freescopes-basic-i-description) [FreeScopes Basic II](https://www.skyradar.com/en/8ghz-radar-training-system/freescopes-basic-ii-description) ).

SkyRadar produces the training radar and FreeScopes for aviation academies and universities. The system can be used by many students concurrently and can be accessed remotely. Talk to us to learn more.

[View full post](https://www.skyradar.com/blog/fmcw-add-on-catching-movements-with-a-simple-arrangement-of-range-fft-threshold-and-ppi-video)

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