Indoor Self Localization of a Single Microphone based on Asynchronous Scanning of Modulated Bessel Beams

Abstract

The paper introduces an indoor self-localization method that employs an ultrasound phased array for generating electronically steerable ultrasound Bessel beams. By scanning the beams with their direction information embedded in the received waveform, the microphone yields a 2D map of amplitude according to the beam direction. Because the maximum amplitude in the map corresponds to the beam direction, multiple beams with different root position offers three-dimensional microphone localization. By numerical examples, the validity of the method is assessed and the advantages and drawbacks of the method are accordingly discussed.