基于五次hermite插值的OFDM信道估计

Channel estimation for OFDM based quintic hermite interpolation

导频辅助信道估计方法是OFDM系统中的主要信道估计方法,可以使用LS(最小均方估计)估计导频点处的信道响应,然后通过插值算法来估计数据点的信道响应。该文提出五次hermite插值信道估计算法,目的是利用该插值算法在不同信噪比的环境下,降低误码率(BER)。通过仿真实验说明,该算法相对于传统的信道估计算法具有较良好的性能。相对于线性插值和三次样条插值,在不同的信噪比环境下具有较低的BER的优点。

The channel estimation based on the pilot is the main way of the OFDM system＇ channel estmation,using the LS（Leastsquare estimate） estimate the pilot points＇ channel response,then,to estimate the channel response by the interpolation algorithm.This paper initiates quintic hermite interpolation based on pilot channel estimation interpolation method,The aim is to reduce the bit error rate.Through the simulation,The results shows that the algorithm has a relatively good performance compared with the traditional channel estimation algorithm.Relative to the linear and the cubic spline interpolation,with the advantages of lower bit error rate under the different signal to noise ratio.