Design of Small MEMS Microphone Array Systems for Direction Finding of Outdoors Moving Vehicles

Design of Small MEMS Microphone Array Systems for Direction Finding of Outdoors Moving Vehicles

In this paper, a MEMS microphone array system scheme is proposed which implements real-time direction of arrival (DOA) estimation for moving vehicles. Wind noise is the primary source of unwanted noise on microphones outdoors. A multiple signal classification (MUSIC) algorithm is used in this paper...

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Bibliographic Details
Main Authors: Xin Zhang, Jingchang Huang, Enliang Song, Huawei Liu, Baoqing Li, Xiaobing Yuan
Format: Article
Language:English
Published: MDPI AG 2014-03-01
Series:Sensors
Subjects:
direction finding
MEMS microphone array
small aperture arrays
system design
UGS
Online Access:http://www.mdpi.com/1424-8220/14/3/4384
Description
Summary:In this paper, a MEMS microphone array system scheme is proposed which implements real-time direction of arrival (DOA) estimation for moving vehicles. Wind noise is the primary source of unwanted noise on microphones outdoors. A multiple signal classification (MUSIC) algorithm is used in this paper for direction finding associated with spatial coherence to discriminate between the wind noise and the acoustic signals of a vehicle. The method is implemented in a SHARC DSP processor and the real-time estimated DOA is uploaded through Bluetooth or a UART module. Experimental results in different places show the validity of the system and the deviation is no bigger than 6° in the presence of wind noise.
ISSN:1424-8220

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