Abstract: The algorithm for direction-of-arrival of the wideband chirp signals based on ESPRIT using the modified spatial time-frequency matrix is presented. The modified STFD matrix which has the similar mathematical construction with the covariance matrix can be obtained with the cross Wigner-Ville distributions of the outputs of the array. Under the condition of uniform line array, the modified STFD matrix can be transformed into the matrix which has the property of rotational invariance. Then the ESPRIT can be applied to DOA estimation.

Key words: direction-of-arrival, modified spatial time-frequency matrices, ESPRIT algorithm