一种基于子空间的OFDM系统半盲信道估计

Subspace-Based Semi-Blind Channel Estimation for OFDM

提出了一种可用于色噪声背景的基于子空间的改进半盲信道估计算法。根据正交频分复用(OFDM)系统模型,利用所获色噪声背景的噪声向量与信道冲激响应矩阵的正交性估计信道冲激响应,给出了算法的步骤。仿真结果表明:算法有较好的收敛性和稳定性。

An improved semi-blind channel estimation algorithm based on subspace which was fit to the background of color noise was put forward in this paper.According to the mode of orthogonal frequency division multiplexing system,the impulse response of the channel was estimated using the impulse response character of noise vector acquired with the matrix of the impulse response channel in the color noise environment.The steps of the algorithm were presented.The simulation results showed that the algorithm had good convergence rate and stability.