This paper gives the ML and MMSE method of channel estimation in DVB-T system and gives an iterative detection of transmitted signals using EM algorithm.

• 摘要针对多径信道环境下的DVB-T系统，给出了数学期望最大(EM)算法迭代检测发送信号的方法，初始信道的频率响应采用最大似然(ML)和最小均方误差(MMSE)方法进行估计。