Estimating directions and times of arrival of multipath signals using a calibrated space-time antenna array

We propose a new approach for joint estimation of directions and times of arrival of multipath channels parameterized by a finite number of path gains, directions and times of arrival. The proposed approach exploits a priori knowledge of the phase shaping filters and array manifold. The significance of this approach is that the directions of arrival (DOA) and times of arrival (TOA) of the multipath signals can be estimated directly from the oversampled channel outputs without assuming channel stationarity over the time-slot nor requiring a start-up sequence in each time-slot to obtain estimates of the channel