RF-Pointer: A Novel Approach to Radio-Frequency Driven Pointer Technology for HCI

This paper introduces the "RF-Pointer," an innovative radio-frequency-based interaction framework designed for real-time tracking and projection of hand movements in virtual spaces. The system can provide a hands-free and distinctive interaction experience suitable for emerging domains like virtual reality and augmented reality. In this study, we delve into the architectural and operational dynamics of the RF-Pointer, utilizing a prototype equipped with a 77 GHz radar sensor. Initial tests reveal an average tracking error of 2.5 cm in estimating the pointer's location. To further illustrate the efficacy of the proposed architecture, we conduct a qualitative comparison, presenting the results in the form of tracked trajectories corresponding to both ground truth and the RF-Pointer estimated trajectories. The tracking results demonstrate that RF-Pointer trajectories closely align with ground truth trajectories.