Abstract: The MIMO-OFDM channel estimation method is researched based on the system design, and a space-frequency domain optimal pilot-tones design algorithm is presented. The algorithm unique capability of estimating fast time-varying and frequency-selective fading channels, and the simplicity of its least square (LS) algorithm free of matrix inversion, so as to greatly decrease the complexity. The computer simulation proves that the algorithm achieves optimal channel estimation in the sense of obtaining the minimum mean square error (MSE) of channel estimation.

Key words: channel estimation, MIMO-OFDM, pilots, matrix inversion, space-frequency domain

摘要： 从系统设计角度研究了MIMO-OFDM系统的信道估计方法，提出一种基于空频域的最优导频设计算法。该算法适用于快速时变和频率选择性衰落信道，在基于LS准则的信道估计算法中无需矩阵求逆运算，大大降低了复杂性。通过计算机仿真证明该算法在空频编码的信道估计中具有最小MSE性能。

关键词: 信道估计, MIMO-OFDM技术, 导频, 矩阵求逆, 空频域

CLC Number: 

• TN929