Overview#Wi-Fi Positioning System (WPS) is used to enhance or where other Geolocation methods are inadequate due to various causes including multipath and signal blockage indoors.
Such systems include indoor positioning systems.
Wi-Fi Positioning System uses databases which correlate the GPS coordinates with the MAC Address of each known Wireless Access Point. Wi-Fi Positioning System accuracy depends on the number of positions that have been entered into the database. To minimize fluctuations in the received signal, there are certain techniques that can be applied to filter the noise.
The most common and widespread localization technique used for positioning with Wireless Access Points is based on measuring the intensity of the received signal (received signal strength indication or RSSI) and the method of "fingerprinting".
Wi-Fi Positioning System is often used in addition to other Geolocation methods to increase accuracy.