Design Considerations When Accelerating an FPGA-Based Digital Microphone Array for Sound-Source Localization
This publication appears in: Journal of Sensors
Authors: B. da Silva Gomes, A. Braeken, K. Steenhaut and A. Touhafi
Publication Date: Jun. 2017
The use of microphone arrays for sound-source localization is a well-researched topic. The response of such sensor arrays is dependent on the quantity of microphones operating on the array. A higher number of microphones, however, increase the computational demand, making real-time response challenging. In this paper, we present a Filter-and-Sum based architecture and several acceleration techniques to provide accurate sound-source localization in real-time. Experiments demonstrate how an accurate sound-source localization is obtained in a couple of milliseconds, independently of the number of microphones. Finally, we also propose different strategies to further accelerate the sound-source localization while offering increased angular resolution.