Abstract: A method of wideband signal’s direction of arrival(DOA) estimation is addressed,and an algorithm of direction-finding applicable for wideband signals is presented.The time-delay between two elements is estimated and the DOA is obtained afterwards.Firstly,the wideband signal is decomposed into multiple single-tone signals through fast Fourier transform(FFT).The spectrums of FFT within 6 dB bandwidth are used to estimate the phase delay respectively,and then the time-delays are attained.Finally,the accurate time-delay estimate is given by weighting these estimates.The optimum weighting coefficients are given.The algorithm has low computation load.The computer simulation results of time-delay estimate show that the performance is approximately to the Cramér-Rao lower bound.