A Multi-user Aided Channel Estimation Method for the Downlink of TD-SCDMA
Shihai Shao · Dianzi xuebao · 2010
In the downlink of TD-SCDMA,the training sequences for all the downlink users are received by the receiver of a specific user.Based on this characteristics,a multi-user aided downlink channel estimation method is proposed.In this method,the information in the channel estimation windows of all the downlink users at the same time slot is first preprocessed to suppress the channel responses contributed by interference(noise);and the preprocessed channel responses in all the channel estimation windows are then combined with appropriate weights to enhance the SNR of the channel response in the channel estimation window of the specific user.Computer simulation results show that the proposed method can significantly improve the performance of channel estimation for the downlink of TD-SCDMA.