On the Needlessness of Signal Bandwidth for Precise Holographic Wireless Localization

Microwave localization systems offer manifold advantages for applications in indoor environments where high freedom of movement hand-in-hand with robust tracking is mandatory. However, reliable live-tracking demands for high update rates and accurate positioning. But due to legal requirements the bandwidth is restricted and therefore the achievable range and multipath resolution is limited. In this paper, the performance of a holographic, Kalman filter based localization approach in microwave localization systems with reduced bandwidth is investigated. The accuracy is verified in an industrial scenario, holding severe multipath using a 24 GHz frequency-modulated-continuous-wave system. Based on experimental results it is shown that the holographic wireless localization technique enables 3D em-precision localization largely unaffected by the chosen signal bandwidth. This unique property is a great advantage compared to classic wireless locating approaches based on multilateration.