Title :
Acoustic source localization in a network of Doppler shift sensors
Author :
Lindgren, David ; Guldogan, Mehmet Burak ; Gustafsson, Fredrik ; Habberstad, Hans ; Hendeby, Gustaf
Author_Institution :
Swedish Defence Res. Agency (FOI), Stockholm, Sweden
Abstract :
It is well-known that the motion of an acoustic source can be estimated from Doppler shift observations. It is however not obvious how to design a sensor network to efficiently deliver the localization service. In this work a rather simplistic motion model is proposed that is aimed at sensor networks with realistic numbers of sensor nodes. It is also described how to efficiently solve the associated least squares optimization problem by Gauss-Newton variable projection techniques, and how to initiate the numerical search from simple features extracted from the observed frequency series. The methods are demonstrated on real data by determining the distance to a passing propeller-driven aircraft and by localizing an all-terrain vehicle. It is concluded that the processing components included are fairly mature for practical implementations in sensor networks.
Keywords :
Doppler shift; aircraft; feature extraction; least squares approximations; optimisation; propellers; search problems; wireless sensor networks; Doppler shift observations; Doppler shift sensors network; Gauss-Newton variable projection techniques; acoustic sensor network; acoustic source; acoustic source localization; all-terrain vehicle; features extraction; least squares optimization problem; localization service; numerical search; propeller-driven aircraft; Acoustics; Atmospheric modeling; Estimation; Frequency estimation; Least squares approximations; Sensors;
Conference_Titel :
Information Fusion (FUSION), 2013 16th International Conference on
Conference_Location :
Istanbul
Print_ISBN :
978-605-86311-1-3