【摘要】 正交频分复用(OFDM)作为一种可以有效对抗符号间干扰(ISI)的高速传输技术,得到了广泛的应用,而信道估计技术作为其重要技术之一得到了很大的发展。信道估计分为盲信道估计、半盲信道估计和基于导频的信道估计。主要研究基于导频的最小平方(LS)信道估计和线性最小均方误差(LMMSE,Linear Minimum Mean SquareError)信道估计,在不同的信道环境和不同的循环前缀(CP)和导频子载波数下的性能比较并得出结论。更多还原

【Abstract】 As a high-speed data transmission technology of resisting inter-symbol interference(ISI) the OFDM is applied to many areas.One of its important technology—the channel estimate is greatly developed.It consists of the blind channel estimate,the semi-blind channel estimate and the channel estimate based on the training/pilot-symbol method.The performance comparison in different conditions between the channel estimate by the Least Square(LS) algorithm and the Linear Minimum Mean Square Error(LMMSE) algorithm based on the training/pilot-symbol is investigated.更多还原