Bats' Auditory Pathway Modeling for Multiple Targets Localization

In this paper, the feasibility of multiple targets localization with a ultrasonic transmitter and only two ultrasonic sensors are tested and its results are given. For this purpose, an experimental hardware system and algorithm which models after bat's vocalization and auditory pathway are built. To mimic bat's behavior features, bat's chirp composed of single band/full band signal component and frequency response in bat's cochlear are modeled after. Time delay estimation is made by cross correlation and deconvolution between transmitting signal and its echoes. As a result, the combination of full band signal and filterbank shows the best performance and the reason is analyzed The physical and theoretical constraints of this approach for multiple targets localization are analyzed and some possible solutions for the improvement are proposed.