基于二维导频的OFDM系统信道估计算法研究

提出了基于一种离散傅立叶变换与一维维纳滤波联合的信道估计算法,相比线性内插与一维维纳滤波联合的估计算法仅利用相邻导频获得导频间信道估计,该算法通过插入二维导频对数据分块,利用每个分块的接收数据进行信道估计,从而提高了信道估计的性能.与二维维纳滤波算法相比,该算法在估计性能接近的情况下,计算复杂度大大降低.

Research of Channel Estimation Based on Two-dimensional Pilot in OFDM System

A joint DFT and one-dimensional wiener filtering channel estimation algorithm was proposed. Compared with the joint linear interpolation and one-dimensional wiener filtering estimation algorithm which obtains channel estimation value only by neighboring pilot, the proposed algorithm gets piecemeal data by inserting two-dimensional pilot and estimate value by received data in every block. So performance of channel estimation is promoted. The performance of the proposed algorithm is close to two-dimensional wiener filtering algorithm＇s, with the problem of large computational complexity solved.