Channel estimation method for rapidly time-vary channel based on high-order data fitting in OFDM systems
基于高次数据拟合OFDM系统快时变信道估计算法

In order to further reduce the calculation complexity and estimated parameter, proposed a novel channel estimation method for rapidly time-vary channel based on data fitting. Utilized the periodic characteristic of PN sequence, separated channel into some blocks in an OFDM symbol in time domain, the number of estimated parameter could be reduced; then used the high-order data fitting method, the more pilot tones could be used in data fitting, finally, calculated the residual error of fitting parameter, got the optimum fitting parameter, and improved the accuracy of channel estimation efficiently. Theory and experiments show that method of validate in rapidly time-vary channel circumstances.