STTC—OFDM系统中的导频辅助半盲信道估计

在快衰落信道情况下，基于判决指导信道估计（DDCE）法不能够很好的跟踪信道参数的变化，使得系统性能产生很大的恶化。在这篇论文中，为了防止在快衰落信道中由于信道估计误差带来STTC-OFDM系统性能恶化，我们在每帧除训练符号外的OFDM符号引入导频辅助半盲（APSB）信道估计技术。同时，为了简化系统，我们仅在每帧最后一个符号使用APSB信道估计技术。在本文的最后我们给出了一些结论。

STTC-OFDM with Added Pilot Semi-Blind Iterative Channel Estimation

The decision-directed channel estimation(DDCE) can't track the channel variations in fast fading channels,and thus the system performance degradation occurs.In this paper,to prevent the performance degradation for STTC-OFDM system in fast fading channels,it proposes the system that applies the APSB channel estimation to all OFDM data symbol except the preamble of a frame.It also proposes the simplified system that applies the APSB channel estimation to the last of a frame.At last,it gives some conclusion.