Interference-tolerant time-difference-of-arrival estimation for modulated signals
William A. Gardner, C.-K. Chen · IEEE Transactions on Acoustics Speech and Signal Processing · 1988
A method for estimation of the difference in the times of arrival of wavefronts of two separate sensors is introduced. The method, called SPECCORR, exploits the spectral correlation property, called spectral coherence, that essentially all modulated signals exhibit to obtain estimates that are highly tolerant to severely corruptive noise and interference. This tolerance is explained theoretically and demonstrated with simulations.>