In this paper

based on the space-time two dimensional MUSIC algorithm

a new method utilizing the received information of user instead of pilot signal during the period of normal communication is proposed to estimate DOA and multipath time delay of the signal of interesting (SOI) user in CDMA system.The eigenvalues and eigenvectors of the covariance matrix formed by a new data model is computed first

then the DOA and time delay can be found by searching noise subspace with a new steering vector.It is not required that the number of the received signals be less than that of the array elements.The DOA closed in space (or the same DOA) and multipath time delay of the SOI of different time delay can be estimated.