A Radar-Based Hand-Held Guidance Aid for the Visually Impaired

In this paper, a wearable hand-held guidance aid for visually impaired people is presented. The system is based on radar technology to feature robustness and reliability as is needed by the use case. Measured distances get translated into an intuitively interpretable sound that gets rendered in a three-dimensional virtual audio space by use of two inertial measurement units and a custom head-related impulse response database. The functionality of the system is shown by the measurement in an everyday scenario.