基于二维DCT的TD-LTE系统信道估计方法

摘要

In TD-LTE system,the high-speed mobile Doppler shift leads to a serious loss in the DFT-based interpolation channel estimation algorithm performance.In order to solve these problems,a two-dimensional discrete cosine transform channel estimation algorithm for TD-LTE system pilot model is proposed in this paper,and a detailed derivation is given.Simulation results show that the performance of the method is superior to the 2D-DFT algorithm,and can approach the performance of 2D Wiener filter estimation algorithm.%在TD-LTE系统中,由于高速移动产生多普勒频偏,使传统的基于DFT插值信道估计算法性能损失严重.为了解决上述问题,提出一种利用TD-LTE系统导频模式的二维离散余弦变换(2D-DCT)信道估计算法,并给出了详细的推导.仿真结果表明,该方法的性能优于2D-DFT算法,可以很好地接近2D维纳滤波估计算法.