摘要
针对填补零的OFDM(ZP-OFDM)系统,提出了一种新的基于子空间的自适应半盲信道估计算法。该算法利用ZP-OFDM系统导频信息,给出精确的信道参数初始值。然后通过一种新的子空间跟踪以及功率方法,进行自适应信道估计。该算法不仅降低了计算复杂度,而且改善了盲信道估计收敛速度慢的缺点,仿真结果也表明其具有较好的估计精度。
This paper proposes a new subspace-based adaptive semi-blind channel estimation for zero padding ofdm systems.Employing the pilot information of ZP-OFDM systems,this algorithm gives accurate initial channel parameters.Then channel estimation is computed adaptively using iterative recursion and power method.Not only does this algorithm reduce computation complexity,but improves the blind channel estimation in convergence rate.Simulation results also show that the algorithm has better perfornlance.
出处
《计算机工程与应用》
CSCD
北大核心
2008年第2期155-156,159,共3页
Computer Engineering and Applications
