Iterative near-far resistant channel estimation by using a linear minimum mean squared error detector

Abstract

Channel estimation techniques for CDMA system need to combat multiple access interference (MAI) to improve the estimation performance. The linear MMSE detector has certain advantages with respect to the near-far problem and can be used to develop a channel estimation algorithm. In this paper, an efficient iterative method for near-far resistant single-user mobile radio channel estimation in slow fading multi-path direct sequence code division multiple access (DS-CDMA) channels is presented. Computer simulation results demonstrate that a significant performance improvement can be achieved with the proposed method especially under extreme near-far conditions.