An efficient multipath channel estimator for DS-CDMA systems

In this paper, we consider maximum likelihood estimation of multipath channel parameters in asynchronous direct-sequence code-division multiple access communication systems. The proposed algorithm is based on the training sequence which is transmitted by the desired user. By modeling the interfering signals as unknown colored Gaussian noise, the multiuser estimation problem is decomposed into a series of single user problems. Simulation results show that the proposed estimator is efficient and robust against the near-far problem and channel fading