An Optimization Method Combining RSSI and PDR Data to Estimate Distance between Smart Devices for COVID-19 Contact Tracing

Figure 3

The experimental setup in the outdoor environment: (a) the picture of the park ground and (b) the schematic diagram of the experimental setup for the park ground. The side length of the grid is about 0.5 meters, and the 13 sampling points (A∼M) were located at the vertex of the grid.

(a)

(b)