High-accuracy positioning using phase difference of electrode array for two-dimensional communication sensor network (2DCSN)

The two-dimensional communication sensor network (2DCSN) is a novel physical form of communication that utilizes the surface as a communication medium to provide both data and power transmission services to the devices placed atop it. To enable 2DCSN to detect the position of sensor devices on the 2D communication sheet, we develop a simple and highly accurate position identifying method that maps phase differences measured at electrode array corresponding to a pilot signal sent by sensor device. We evaluate our proposed method by performing actual position measurement on a 30 cm × 30 cm area, where the phase differences are measured by eight array electrodes corresponding to 2.44GHz pilot signal. The experiment results reveal that our method can detect position at resolution of 2.5 cm square grid perfectly.