Summary: TIME DELAY ESTIMATION AND SIGNAL RECONSTRUCTION USING
MULTI­RATE MEASUREMENTS
Omid Jahromi and Parham Aarabi
Artificial Perception Laboratory,
Department of Electrical and Computer Engineering, University of Toronto
Toronto, ON, Canada, M5S 3G4
Email: omidj@control.toronto.edu, parham@ecf.toronto.edu
ABSTRACT
This paper considers the problem of fusing two low­rate
sensors (e.g., microphones) for reconstructing one high­
resolution signal when time delay of arrival (TDOA) is
present as well. We show that under certain condi­
tions the phase of the cross­spectrum­density of low­
rate measurements becomes independent of the signal
in the high­rate front end of the system. We then uti­
lize this fact to demonstrate that it is possible to extend
a class of TDOA estimation techniques known as the
generalized cross correlation technique to linear­phase
multi­rate sensor systems. Finally, we illustrate how
the combination of the theory of linear­phase multi­

Source: Aarabi, Parham - Department of Electrical and Computer Engineering, University of Toronto

Collections: Computer Technologies and Information Sciences