MIMO-OFDM系统时域信道估计新方法

Novel Time-Domain Channel Estimation Method for MIMO-OFDM Systems

提出一种多输入多输出-正交频分复用(MIMO-OFDM)系统的时域信道估计新方法。设计了一种具有最佳自相关性的实训练序列,并利用训练序列的自相关性获得信道的时域冲激响应。同时针对时域信道具有一定的稀疏性,通过信道有效路径估计,减少噪声对信道估计结果的影响,提高算法估计性能。理论分析和实验仿真结果表明,文章方法在更低的计算复杂度和更高的系统传输效率下,具有更高的估计性能。

A novel time-domain channel estimation method for Multi-Input Multi-Output Orthogonal Frequency Division Multiplexing（MIMO-OFDM） is proposed. A real training sequence with perfect auto-correlation is designed, then the channel impulse response in time domain is obtained on ac- count of the auto-correlation property of the training sequences. As the certain character of sparse- ness of the time-domain channel, the estimation of channel valid paths can reduce the impact of the noise and further improve the estimation performance. The results of both theoretical analysis and ex- periments show that the proposed method has more excellent estimation performance with lower com- putation complexity and higher system transfer efficiency.