摘要
综述了MIMO-OFDM系统中的信道估计算法,概述了基于训练序列、导频符号的信道估计,以及盲信道、半盲信道估计.非盲信道估计算法收敛速度快,简单且易实现;盲信道估计算法可有效节省系统带宽,但算法复杂度较大.将非盲信道估计方法与盲信道估计方法结合起来形成半盲信道估计算法比非盲算法具有更高的频谱利用率,比盲信道估计算法具有较低的复杂度,在实际应用中达到了算法的性能与复杂度的协调,因此半盲信道估计算法在未来将会受到人们的重视.
The existing channel estimation algorithms for MIMO-OFDM are reviewed, including the training-sequence, pilot-symbols-aided channel estimation, blind and semi-blind channel estimation. Non-blind channel estimation algorithm, with its fast convergence rate, is simple and easy to implement. Blind channel estimation algorithm can effectively save system bandwidth but has higher computational complexity. Semi- blind channel estimation algorithm, which is the combination of non-blind and blind channel estimation method, has higher spectrum utilization than the non-blind algorithm and lower complexity than the blind channel estimation algorithm, and it can compromise the algorithm performance and complexity in practical applications. Therefore ,semi-blind channel estimation algorithm will increasing arouse the public＇s attention.
出处
《郑州轻工业学院学报（自然科学版）》
CAS
2009年第2期87-90,共4页
Journal of Zhengzhou University of Light Industry:Natural Science
基金
重庆邮电大学4G移动通信专项资金项目(A2004-70)
重庆邮电大学青年教师基金项目(A2005-30)
