文中提出了一种改进的时变频率选择性衰落MIMO信道追踪算法。讨论了影响算法性能的因素。该算法利用卡尔曼滤波器,在一帧内分组追踪信道的实时变化,不仅能减少一帧内的信道追踪次数,还可以降低系统的误码率,提高系统的性能。仿真结果表明了算法的可行性。
This paper presents a modified channel tracking algorithm for MIMO wireless communication systems in a frequency selective fading time-varying environment. The modified algorithm employs Kalman filter to track the time variation of MIMO channel for blocks of received and detected symbols in a data frame, which could not only reduce the tracking rate in a data frame, but also obtain a lower BER and improve the overall system performance. The simulation results reveal the feasibility of the proposed algorithm, and the factors which influence its performance are discussed.