Analysis of Time-Reversal Focusing for Human Computer Interface Applications by Using UWB Acoustics Waves

Hla Myo Tun ； May Phyo Maung ； Arum Kumar

《Bahria University Journal of Information & Communication Technologies》 6卷1期 (2013/01) Pp. 1-7

並列摘要

In this work finite difference time domain (FDTD) scheme based the time reversal focusing to localize source by using MATLAB GUI. There are three analyses of Cree space model, waveguide model and user define model for source location in a perfectly matched layer boundary. We have shown the energy spectrum for propagation of acoustics wave in a room to focus by using array of transducers and source. In these plots we, first transmit the signals from source to the array of transducers and then the signals can be retransmitted back from array of transducers to the source by using time reverse algorithm. The reverse signals can be focused the location of source based on the proposed method. The simulation results are evaluated to localize the source by using FDTD method in this work. In this research work, time-reversal focusing was designed for human computer interface applications by exploiting the ultra-wideband (UWB) acoustics waves. In contrast, conventional inverse scattering techniques are restricted by the diffraction limit on their ability to determine geometrical features. Additionally, frequency-domain inverse techniques are affected from the particular properties or the medium for each diverse realization. UWB signals that can be used to get better detection capabilities combat a number of scattering problems. They can pilot to statistically stable imaging techniques that depend only on the statistical properties or the random medium. The scheme is to focus array of transducers from any direction by using Time Reversal-Ultra Wideband (TR-UWB).

並列關鍵字

Time Reversal Mirrors ； Human Computer Interface ； Acoustics Waves ； Array Signal Processing ； FDTD