SUBSPACE-BASED TIME DELAY ESTIMATION FOR ASYNCHRONOUS BANDLIMITED DS-CDMA SYSTEMS
异步带限DS-CDMA系统中基于子空间的时延估计算法

An algorithm for time delay estimation in asynchronous band-limited DS-CDMA systems is presented. The algorithm is based on subspace concept. The noise subspace is estimated first, and then coarse estimation and fine search of time delay are implemented sequentially. The performance of the algorithm is analyzed, and simulations are carried out. The results show that the algorithm is near-far resistant and robust to the number of users partly, the estimation accuracy is improved greatly, and the required computation is reduced.