A Subspace-based Blind Channel Estimation For Zero-padded MC-CDMA
M. Wahab, Abdelhak M. Zoubir · 2005
A subspace-based blind channel estimation for multicarrier CDMA system employing zero-padding (ZP) technique is proposed in this paper. This ZP technique is mainly used for mitigating the effect of channel zeros on the performance of the MC-CDMA in the wireless channels. An adaptive algorithm for this channel estimation is also proposed in order to reduce the computational complexity. Performance evaluation is presented for downlink and uplink transmission in the presence of channel zeros. Simulation results show that the channel estimator and the MC-CDMA system perform well in the presence of channel zeros.