Title :
A low-power CMOS integrated circuit for bearing estimation
Author :
Julian, Pedro ; Andreou, Andreas ; Mandolesi, Pablo ; Goldberg, David
Author_Institution :
Dept. of Electr. & Comput. Eng., Johns Hopkins Univ., Baltimore, MD, USA
Abstract :
We present the design and testing of a micropower integrated circuit for the estimation of the bearing angle of a sound source with respect to a pair of microphones. The algorithm is based on a modified binary cross-correlation approach suitable for low-power operation. The circuit has been tested and operates at 600 μW at performance levels matching theoretical simulations.
Keywords :
CMOS digital integrated circuits; acoustic signal processing; correlators; digital signal processing chips; direction-of-arrival estimation; low-power electronics; 600 muW; bearing angle estimation; low-power CMOS IC; microphones; micropower integrated circuit; modified binary cross-correlation approach; sound source; Acoustic noise; Acoustical engineering; CMOS integrated circuits; Circuit testing; Delay effects; Delay estimation; Direction of arrival estimation; Microphones; Noise figure; Shift registers;
Conference_Titel :
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on
Print_ISBN :
0-7803-7761-3
DOI :
10.1109/ISCAS.2003.1206263
