【摘要】 正交频分复用系统具有简单的单抽头频域均衡,在均衡之前需要完成信道估计。本文提出一种基于隐藏导频序列的信道估计方法,只要利用接收信号一阶统计信息就可估计出信道信息。这种半盲的信道估计方法具有简单的信道估计和均衡,而且不占用频谱资源。仿真结果表明本方法能有效进行信道估计,并得到了隐藏序列的最佳能量值。更多还原

【Abstract】 One of the attractive features of OFDM(Orthogonal Frequency Division Multiplexing)is its simple one-tap equalizer.Nevertheless,the channel information has to be identified firstly.In this paper,an OFDM channel estimation method,based on implicit pilot only employing first order statistics of the received signal,is proposed.Simulation results show that good channel estimation performance can be obtained by using the proposed method and the optimal value of the implicit sequence’s energy is discussed.更多还原