AOA estimation for coexisting UWB signals with multipath channels

The applications of location-based service (LBS) grow rapidly and draw significant research attention recently. As the advance of localization technology, not only the LBS can be applied outdoors but also in indoor environments with abundant multipath channels. Angle-of-Arrival (AOA) estimation is a vital technology for signal source localization; however, its accuracy is significantly affected by multipath signal propagation. Ultra-Wideband (UWB) signal as one of promising short-range communication technologies has been used in signal localization and shown excellent performance. Yet rare works investigate the scenario that several UWB signal sources coexisting in an environment. This work considers AOA estimation for coexisting UWB signal sources in an environment with multipath channels. An antenna array is designed for such an environment, which can classify signals and estimate the AOA of their corresponding shortest path based on received signals. Feasibility and performance of the proposed method are verified by computer simulation results.