Time-delay estimation using MLE approach for wide-band radar systems

The considerable practical importance in the area of communication. Consequently many procedures were developed for this estimation [1,2]. One such is the Maximum Likelihood Estimation (MLE) method where the time delay between the signals received at two spatially seperated sensors in the presence of uncorrelated noise can easily be estimated. A cross correlation of the resulting sequences is carried out to determine the Time Difference of Arrival (TDOA) of the signal at the two sensors. This can be realized in practice by a pair of receiver filters followed by a cross-correlator. Also the true parameters of interest and hence the target location can be obtained from a set of time delay measurements using a group of sensors [3,4].