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2022-23-05
User Guide for XENSIV™ K
IT CSK BGT60TR13C
Table of contents
5
Presence detection solution
The Infineon radar presence detection solution detects both macro- and micro-motions in a configurable range
using the XENSIV™ BGT60TR13C
radar sensor. This user guide describes the required SW and HW, including how
to set up and get started with the Infineon radar presence detection solution using the CSK. Please refer to the
CSK user manual for more details on the CSK. Additional documents are available and these are listed at the end
of this document.
5.1
Radar for presence detection
Motion sensing is a standard feature in many devices. Today’s devices become smarter by knowing if the user is
around or not. Traditionally motion sensors have been designed using passive infrared (PIR) sensing. As simple
as PIR is, there are performance limitations. For example, PIR sensors cannot detect small motions when a person
is stationary. In addition, they require a lens, while radar sensors can be covered and disguised behind
enclosures.
What if there was a solution that could detect the tiniest movements without requiring an opening in the product
housing?
Infineon’s radar presence detection solution enables the detection of human presence within a
configured range.
Enabled by Infineon
XENSIV™
BGT60TR13C radar (60 GHz radar, antenna-in-package) with its sophisticated radar
presence detection algorithms, this solution provides extremely high accuracy in detecting both macro- and
micro-movements.
Figure 28
CSK motion detection using 60 GHz radar sensor
5.2
Presence detection application
Presence detection is an application of a radar system, where the radar can detect targets in a specified vicinity.
Specifically, the radar detects targets within an angle coverage up to a certain distance. Parameters such as
maximum distance can be configured through the radar settings. Presence detection can be further utilized for
applications such as keywordless authentication or automatic interaction of smart devices with the user. Figure
29 shows a high-level representation of presence detection.
Infineon
’
s presence detection algorithm consists of a state machine comprising the following two states:
•
Absence state
•
Presence state
A state machine is a mathematical model of computation and can be in exactly one of the finite number of states
at a given time.
