TY - GEN
T1 - Source localization on solids utilizing time-frequency analysis of parameterized warped signals
AU - Kattukandy, Arun R.
AU - Reju, Vaninirappuputhenpurayil Gopalan
AU - Khong, Andy W.H.
PY - 2014
Y1 - 2014
N2 - We propose a new approach for source localization on solids with applications to human-computer interface. We analyze the wave propagation of flexural modes of vibration, generated by an impact on a solid surface, to characterize the dispersive linear time-varying system having non-linear phase response. We show that a difference in dispersion between two signals propagating through solids can be mapped directly to the relative propagation distance if the signals are appropriately time-warped. We then exploit this important property for source localization by computing the similarity of the warped signals in the time-frequency domain. As the proposed source localization algorithm jointly estimates warping-based polynomial parameters and source location, the method does not require pre-calibration.
AB - We propose a new approach for source localization on solids with applications to human-computer interface. We analyze the wave propagation of flexural modes of vibration, generated by an impact on a solid surface, to characterize the dispersive linear time-varying system having non-linear phase response. We show that a difference in dispersion between two signals propagating through solids can be mapped directly to the relative propagation distance if the signals are appropriately time-warped. We then exploit this important property for source localization by computing the similarity of the warped signals in the time-frequency domain. As the proposed source localization algorithm jointly estimates warping-based polynomial parameters and source location, the method does not require pre-calibration.
KW - frequency dispersion
KW - Human-computer interaction
KW - source localization on solids
KW - unitary warping
UR - http://www.scopus.com/inward/record.url?scp=84905280951&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84905280951&partnerID=8YFLogxK
U2 - 10.1109/ICASSP.2014.6853684
DO - 10.1109/ICASSP.2014.6853684
M3 - Conference contribution
AN - SCOPUS:84905280951
SN - 9781479928927
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 689
EP - 693
BT - 2014 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2014
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2014 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2014
Y2 - 4 May 2014 through 9 May 2014
ER -