Time Delay Estimation Using Windowed Differential Magnitude of Cross Correlation and Its Hilbert Transform

A method is proposed for estimating time delay between MFSK signals received at two spatially separated sensors. Considering the periodical characteristic of the peaks of cross correlation, the proposed method combines window technology and differential magnitude between cross correlation and its Hilbert transform. The time argument at which the differential magnitude achieves the peak in the range of window is the delay estimate. The method is compared with several other methods. Simulation results show that the proposed method can get better performance. Under certain conditions the performance of proposed method can be better than CRLB by using priori information about the transmitter and receivers. (C) 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of [name organizer]