A fast tracking method for time-variant DOA of signals

Efficiently tracking the time-variant parameters of the array signals is one of the keys in modern electronic warfare (EW) or supervising the aerial signals in the civilian radio field. Aimed at solving the difficulty that estimation methods for the time-invariant parameters cannot adapt themselves to tracking time-variant parameters, this paper probes into the methods tracking the time-variant DOA (direction of arrival) of the array signals based on the plane rotation (Givens rotation). The computer simulation results prove the efficiency of proposed method