KW36
NXP Semiconductors
It implements a simple trilateral localization system using the Kinetis KW36 wireless MCU.
Application NoteNxp
KW36 Localization Based on RSSI Ranging Application
Implement trilateral localization using Bluetooth LE RSSI ranging with the Kinetis KW36 wireless MCU, covering signal modeling, filtering algorithms, and distance estimation.
Overview
This application note describes the implementation of a trilateral localization system using Bluetooth Low Energy (LE) Received Signal Strength Indication (RSSI) ranging on the NXP Kinetis KW36 wireless MCU. It details the wireless signal path-loss shadowing model used to estimate distance and provides the mathematical framework for trilateral localization using the least square method. The document outlines two localization schemes—advertising-based and connection-based—and discusses embedded software considerations for RSSI acquisition using the Wireless UART project. Additionally, it evaluates various filtering algorithms, including mean, median, and Gaussian filtering, to mitigate environmental interference and improve positional accuracy.
Use Cases
- Indoor asset tracking systems
- Proximity detection and distance estimation
- Real-time location services (RTLS)
- Bluetooth LE signal quality analysis
Topics
NXP
KW36
Bluetooth LE
RSSI
Localization
Trilateration
Path-loss model
Kinetis MCU
Gaussian filtering
FRDM-KW36
Referenced Parts
| KW36 | NXP Semiconductors | It implements a simple trilateral localization system using the Kinetis KW36 wireless MCU. |