The post-processing algorithm can improve the results from 9.05–10.94% for the conducted experiments, providing the highest success rate of 95.94% with a precision of 4 m for Wi-Fi fingerprint-based indoor positioning. Keywords: Wi-Fi fingerprint; indoor positioning; IoT; data pre- and post-...
charge-coupled device (CCD) camera; 3, drill rod; 4, light-emitting diode (LED) target; and 5, drill bit. 3. Design and Optimization of the LED Target The LED target contains a filter plate, a fixing plate, a printed circuit board (PCB), and LEDs, as shown in Figure 3. The ...