摘要
分析了OFDM通信系统信道估计采用二维自适应维纳滤波的情形,信道估计根据对不同的信道环境(多径时延,多普勒频移)的实时检测,自适应地选择适宜的滤波参数,动态地跟踪信道的变化特征。仿真分析得到了最优的滤波参数并且证明了在非完全匹配条件下的插值亦有很好的效果。
In this paper we investigate adaptive two dimensional （2D） Wiener filtering for channel estimation in OFDM based communication systems. An estimation of the users current speed and multipath spread has been done currently for varied channel environment. According to the result, we will adaptively select one of the prestored Wiener filters in each time and frequency direction for channel estimation. Extensive simulations have been performed to determine the best choice of filterset and to investigate the effects of mismatch to channel state.
出处
《电视技术》
北大核心
2006年第2期34-37,共4页
Video Engineering
