Improved sound-based localization through a network of reconfigurable mixed-signal nodes

This paper presents a low cost implementation of the phase-based sound localization method proposed in Halupka et al [2]. The implementation uses PSoC programmable mixed-signal embedded System on Chip, which incorporates microcontroller, on-chip SRAM and flash memory, programmable digital blocks and programmable analog blocks, all integrated on the same chip. In order to improve the localization accuracy, filter corner frequency reconfiguration and gain reconfiguration is implemented. A wireless sensor network implementation is also presented. An extensive set of experiments are provided to explore the advantages of dynamic reconfigurability as well as the network implementation.