摘要
为节省系统带宽,提出了宽带M IMO-OFDM(Mu ltip le-InputMu ltip le-Output and O rthogonal Frequency D i-vision Mu ltip lexing)系统中的一种信道估计方法。该方法只需对重要抽头进行估计,且两步算法在导频数小于信道响应时间和未知功率延迟分布的情况下,可获得与经典的LMMSE(L inearM in imum M ean Square Error)算法相近的性能,计算机仿真结果证实了其有效性。
In order to save the precious bandwidth, a new channel estimation method for MIMO-OFDM （ Multiple-Input Multiple-Output and Orthogonal Frequency Division Multiplexing） systems is proposed, by estimating only significant taps and Two-Pass algorithm, the method performs approximately the same as conventional LMMSE （ Linear Minimum Mean Square Error） algorithm when the number of pilots is less than the channel response and with no PDP （ Power Delay Profile） knowledge in advance, finally the validity of the proposed method is demonstrated in computer simulations.
出处
《吉林大学学报（信息科学版）》
CAS
2006年第3期283-288,共6页
Journal of Jilin University（Information Science Edition）
关键词
多输入多输出正交频分复用
导频
信道估计
功率延迟分布
均方误差
multiple-input multiple-output and orthogonal frequency division multiplexing （MIMO-OFDM）
pilot
channel estimation
power delay profile （PDP）
mean square error （MSE）
