To apply the blind signal separation method to DOA estimation, the blind signal separation (BSS) algorithm based on fast fixed-point independent component analysis is introduced in this paper. By using this algorithm, the estimation of manifold matrix is deduced from the gained separated matrix. We obtain the DOA (direction-of-arrival) of signals from angle scaling based on the projection of the column vector on the real array configuration. The results of the experiment show that this algorithm has good resolution in a low SNR (Signal Noise Ratio) environment compared with the MUSIC (Multiple Signal Classification) algorithm.