OFDM系统中一种基于重叠分块的OLR MMSE信道估计方法

An OLR MMSE Channel Estimation Method Based on Overlap Partition for OFDM Systems

最小均方误差MMSE是OFDM系统中一种常用的信道估计算法,针对MMSE算法复杂度太高的缺点,首先利用重叠分块方法将信道自相关矩阵分解为各个独立的低阶子矩阵,分别进行最优低秩OLR MMSE信道估计,最后对所有的信道频率响应进行合并.仿真结果表明,该方法补偿了边缘子载波效应,能够在大大降低算法复杂度的同时保证一定的估计精度.

MMSE is a common channel estimation method in （FDM systems. To reduce its algorithm complexity, this paper proposes an optimal low-rank MMSE estimation method based on overlap partition. This method can compensate for high mean square error at the edge subcarriers, reduce algorithm complexity effectively and guarantee low estimation error. The simulation result shows its superior performance.