Title :
Field test results for low power bearing estimator sensor nodes
Author :
Julian, P. ; Andreou, A.G. ; Cauwenberghs, G. ; Stanacevic, M. ; Goldberg, H. ; Mandolesi, P.S. ; Riddle, L. ; Shamma, S.
Author_Institution :
Dep. de Ing. Electrica y Computadoras, Univ. Nacional del Sur, Bahia Blanca, Argentina
Abstract :
The paper describes experimental results of low power sensor nodes designed to perform bearing estimation. The nodes are intended to form a wireless sensor network able to locate an audio source. Two different nodes are tested: one is based on a cross-correlation derivative integrated circuit (IC), and the other on a gradient flow IC. Implementation details and experimental results of both systems working in a natural environment are presented.
Keywords :
audio signal processing; correlation methods; direction-of-arrival estimation; gradient methods; low-power electronics; microphone arrays; power consumption; wireless sensor networks; audio source location; bearing estimation; bearing estimator sensor nodes; cross-correlation derivative integrated circuit; gradient flow IC; low power sensor nodes; wireless sensor network; Algorithm design and analysis; Charge coupled devices; Circuit testing; Direction of arrival estimation; Educational institutions; Energy consumption; Integrated circuit testing; Microphones; Sensor phenomena and characterization; Wireless sensor networks;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1465558
