Dr. Muhammad Tahir

University of Engineering & Technology Lahore

“Wireless acoustic sensor network ”

We proposed an efficient self-calibration mechanism, achieving localization as well as orientation, for wireless acoustic sensor network. Time difference of arrival (TDOA) based on wireless and acoustic signals, while direction of arrival (DOA) based on acoustic only, are used jointly to achieve acoustic sensor node calibration. Each sensor node is equipped with three microphones and a wireless transceiver. Sensor nodes are calibrated by using two beacon positions with respect to a reference node whose position is assumed to be known. Our approach requires a single moving beacon (MB) equipped with RF and acoustic signal sources. Once a node has been calibrated (in terms of location and orientation) it can be considered as a valid reference for the remaining uncalibrated nodes. We have developed hardware platform to validate the proposed calibration mechanism. Performance results show the efectiveness and usefulness of the proposed mechanism.

Associate Professor in the Department of Electrical and Computer Engineering at the University of Engineering and Technology (UET) Lahore. Prior to joining UET I was a postdoctoral researcher at the Institute of Microelectronics and Wireless Systems, National University of Ireland Maynooth. I earned my Ph.D. in Electrical and Computer Engineering from the University of Illinois at Chicago in Fall, 2008. I received my B.Sc. in Electrical Engineering and M.Sc. in Computer Engineering from the University of Engineering and Technology Lahore, Pakistan.