DualBand: Supporting On-Body Touch Input Using Two Wristbands with RF Sensing

Rx Electrodes in the inner side Tx GND Rx Signal generator MCU Wristbands with RF transceivers On-body RF signal propagation from a left ( ) / right ( ) hand Pre-processing w/ a Goertzel filter, a moving median, Touch input detection by detecting sudden intensity variations Localization feature extraction by taking intensity differences Touch input localization w/ an SVM classifier Input Raw RF readings from both wristbands b c a Figure 1: Overview of DualBand.(a) DualBand supports on-body touch interaction using two wrist-worn devices.(b) RF signals propagates through the body.(c) DualBand analyzes how RF signals propagate through the body to detect touch inputs and estimate their locations.