Broadband analysis of a microphone array based road traffic speed estimator

Author

Lopez-Valcarce, Roberto

Author_Institution

Dept. de Teona de la Senal y las Comunicaciones, Univ. de Vigo, Spain

fYear

2004

fDate

18-21 July 2004

Firstpage

533

Lastpage

537

Abstract

Recently, a maximum likelihood estimate has been proposed for road vehicle speed based on two omnidirectional microphones. We undertake a broadband analysis in a stochastic setting in order to expose the effect of input SNR, target speed, bandwidth, and observation time in the SNR at the output of the modified crosscorrelator on which the estimate is based. The use of 1-bit quantized signals, which provides an important hardware simplification, is also considered and seen to result in mild performance degradation.

Keywords

acoustic signal processing; array signal processing; correlators; maximum likelihood estimation; microphone arrays; quantisation (signal); road vehicles; velocity measurement; SNR; broadband analysis; hardware simplification; maximum likelihood estimate; modified crosscorrelator; observation time; omnidirectional microphone array; quantized signal; road traffic speed estimator; road vehicle speed; stochastic setting; target speed; Bandwidth; Costs; Delay estimation; Hardware; Maximum likelihood estimation; Microphone arrays; Road vehicles; Signal processing; Signal sampling; Stochastic processes;

fLanguage

English

Publisher

ieee

Conference_Titel

Sensor Array and Multichannel Signal Processing Workshop Proceedings, 2004

Print_ISBN

0-7803-8545-4

Type

conf

DOI

10.1109/SAM.2004.1503005

Filename

1503005