移动环境中IEEE 802.16d系统的信道估计研究

Research channel estimation for IEEE 802.16d in mobile environment

对在移动环境中的IEEE 802.16d系统中的信道估计进行了分析。为了增强系统对移动性的支持,提出了一种利用线性模型预测的方法来跟踪每帧中时变信道的频域信息。仿真结果表明,采用该方法可以在有较大多普勒频移以及恶劣的信道环境下仍能精确地得到信道信息,能很好地支持系统中移动终端的接入。

This paper analyzed the channel estimation algorithms in the IEEE802.16d mobile system. In order to enhance the mobility of the system , porposed an linear model to approximate the time-varying characteristic of channel impulse response in the frequency domain during each frame. The simulation results show that the proposed methods can still provide accurate channel information even in large Doppler frequency shift as well as poor channel environment,it can be good support the access of mobile terminal in the system.