Combination of LMMSE equalization and multi-path interference cancellation in WCDMA receivers
Zhan Gao, Qihui Wu, Jinlong Wang · 2005
High-speed packet transmission is an important characteristic in the 3rd generation mobile communication system. In order to enhance the performance of the high-speed packet transmission in low spreading factor, a new WCDMA receiver of chip equalizer (LMMSE-MPIC) is presented in this paper, which combines the linear chip equalizer with nonlinear multi-path interference cancellation together. The algorithm (PC-LMMSE) is proposed based on pilot cancellation. Theoretic analysis and computer simulations show that LMMSE-MPIC is superior to conventional Rake and LMMSE equalizer and effectively improves the performance of the WCDMA system in low spreading factor.