一种改进的MIMO OFDM系统信道估计算法

An efficient channel estimation for MIMO OFDM systems

本文对MIMOOFDM系统中基于训练序列的信道估计问题进行了研究,针对信道冲击响应的最大抽头数大于每个OFDM符号中导频数的情况,提出一种有效的结合前后若干训练序列进行信道估计的算法和结合方式。仿真结果表明,在基于无线局域网(WLAN)中打包传送的MIMOOFDM系统里,本文的方法比采用块状训练序列的估计算法有着更小的归一化均方误差。

The channel estimation methods for MIMO OFDM systems based on training sequences are investigated. To solve the problem that the maximum channel path is larger than the number of pilot tones in one OFDM symbol, an efficient comb type training structures and the corresponding channel estimation technique are proposed. The simulation results show that the proposed method has smaller normalized MSE than the method based on block type training sequences for packet-based MIMO OFDM systems in wireless local area networks.