发射分集OFDM系统中一种基于Turbo迭代的判决反馈信道估计

A Turbo iteration-based decision directed feedback channel estimation for OFDM systems with transmitter diversity

本文对频率选择性衰落信道条件下发射分集OFDM系统的信道估计进行了研究,提出了一种基于Turbo迭代的判决反馈信道估计方法。该方法充分利用Turbo迭代信息来改善信道估计性能,且因无需求逆运算,使得整个系统的复杂度增加不多。仿真结果表明,所提方法在较高信噪比条件下,明显提高了系统信道估计的性能,且适合于高速移动的信道环境。

This paper studies the channel estimation for OFDM systems with transmitter diversity in frequency selective fading channels. A decision feedback channel estimation method based on Turbo iteration is presented. The method makes full use of Turbo iterative information to improve the channel estimation performance and it needs no matrix inversion, which increases few complexity of the whole system. The simulation results show that the presented method improves the channel estimation performance of the system obviously in the condition of high signal-noise ratio and can also be applied to the high speed mobile channel environments.