Title :
Sonar localization using receiver beam profile features
Author :
Guarato, Francesco ; Windmill, J. ; Gachagan, Anthony
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. of Strathclyde, Glasgow, UK
Abstract :
A localization method for a sonar system equipped with an emitter and two receivers is presented in this paper. The signal reflected from the target is filtered through the receiver beam patterns whose knowledge is used to estimate the direction of the echo. Indeed, the known emitted signal and measurement of its travel time make it possible to compensate for distance and air absorption effects, and to calculate the ratio between the received echo and the original signal at all frequencies. Simulations with two beam patterns were conducted. A monotonic one over orientations was implemented, to show evidence that linearity reduces ambiguity: in this case, the method returns estimates with an error of less than 1.5° with SNR = 50 dB. If a bat´s beam pattern is adopted, most of orientations are estimated with an error less than 5°, even when SNR = 15 dB.
Keywords :
echo; receivers; sonar signal processing; air absorption effect; echo direction estimation; emitter; receiver beam pattern; receiver beam profile feature; signal reflection; sonar localization; Acoustic beams; Acoustics; Azimuth; Ear; Receivers; Signal to noise ratio; Sonar; Beam pattern; localization; sonar; ultrasound;
Conference_Titel :
Ultrasonics Symposium (IUS), 2012 IEEE International
Conference_Location :
Dresden
Print_ISBN :
978-1-4673-4561-3
DOI :
10.1109/ULTSYM.2012.0041