MIMO-OFDM 系统角域LS 信道估计算法

当信道估计算法利用先验信息进行MIMO-OFDM 信道辨识时，计算复杂度将显著增加．针对这一问题，设计一种无需先验信息且计算复杂度低的相移正交角域LS 算法．该算法的基本思想是：在保证LS 算法均方误差（MSE）性能达到最小的前提下，根据角域内不同发送和接收天线间信道的空间独立特性，采用最有用抽头系数（MST）技术来提高信道估计性能．仿真结果表明，所提算法具有良好的估计性能．

Angle-domain LS Channel Estimation Algorithm for MIMO-OFDM Systems

The algorithm complexity will be significantly increased when the prior knowledge is used to obtain the identification of multiple-input multiple-output with oahogonal frequency division multiplexing(MIMO-OFDM)channels.In order to deal with this problem,a new scheme of phase shifted orthogonal angle-domain LS(least square)algorithm which has low complexity and doesn't need any prior information is designed.The idea of the proposed algorithm which is under the premise of the minimum mean square error(MSE)performance of LS algorithm depends on the spatial independence of channels between different transmit and receive antennas in angle domain.Then,the most significant taps(MST)technique is used to reduce the effect of noise on the estimates.Simulation results indicate that the proposed algorithm is of better performance.