WiFi-Based Indoor Positioning and Communication: Empirical Model and Theoretical Analysis

Table 1

Comparison of different positioning technology.

Name	Advantages	Limitations
Ultrasonic positioning	The equipment is simple, and the measurement results have high accuracy.	Affected by NLOS, the hardware requirements are high, and the cost is high.
Infrared positioning	Does not spread during transmission.	Affected by NLOS, the transmission distance is limited.
RFID positioning	The system structure and measurement principle are simple.	Accuracy is directly proportional to system complexity.
UWB positioning	Low power consumption, strong anti-interference, and low system complexity.	Requires strict clock synchronization at the sender and receiver, and the hardware cost is high.
WiFi positioning	Simple equipment, low cost, and common implementation difficulty	Low accuracy and lack of effective use of signals.