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中文摘要：
在TD-SCDMA下行链路中,某一特定下行用户会收到所有下行用户的训练序列,利用这一特殊性,提出了一种多用户辅助的下行信道估计方法.该方法首先对同一时隙所有下行用户信道估计窗内的信息进行预处理,抑制由干扰（噪声）贡献的信道响应;然后将预处理后的各信道估计窗内的信道响应加权合并,增强当前用户信道估计窗内信道响应的信噪比.仿真结果表明,提出方法能有效改善TD-SCDMA下行链路的信道估计性能.
英文摘要：
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.
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