REPUBLIC OF SERBIA

MINISTRY OF DEFENCE

www.mod.gov.rs

MINISTRY OF DEFENCE

Material Resources Sector

Defensive Technologies Department

Military Technical Institute

www.vti.mod.gov.rs

An FPGA Implementation of Beamforming Algorithm
with Digital MEMS Microphones

Iva Salom

Institute Mihailo Pupin, University of Belgrade, iva.salom@pupin.rs

Vladimir Čelebić

Institute Mihailo Pupin, University of Belgrade, vladimir.celebic@pupin.rs

Milan Milanović

Institute Mihailo Pupin, University of Belgrade, m.milanovic@pupin.rs

Dejan Todorović

Dirigent Acoustics, Belgrade, dejan.todorovic@dirigent-acoustics.co.rs,

Mirjana Radosavljević

Dirigent Acoustics, Belgrade, m.radosavljevic@dirigent-acoustics.co.rs

Jurij Prezelj

Faculty of Mechnical Engineering, University of Ljubljana, Slovenia, jurij.prezelj@fs.uni-lj.si

Abstract:The goal of the project described in this paper was to design an acoustic system for localization of the dominant noise source by implementation of the conventional delay-and-sum beamforming algorithm on FPGA platform with a sound receiver system based on digital MEMS microphones. Such configuration enables the execution of the beamforming algorithm in real time.Additionally, FPGAs are bringing many benefits in terms of safety, reliability, rapidity, and power consumption. The system was designed and ascertainedusing rapid prototyping methodology with Matlab Simulink tools.A performance evaluation of the FPGA design is presented in terms of hardware resources for the chosen Xilinx Spartan-6 family.

Keywords:beamforming, MEMS microphone, microphone array, Simulink, sum and delay, FPGA .