数字电视广播系统中OFDM信道估计的几种算法及分析

Analysis and Several Algorithms of Estimating the OFDM Channel in Digital Television Broadcast System

正交频分复用技术以其频带利用率高、可有效抵抗多径干扰和窄带干扰等优点,被高清晰度数字电视广播系统采用为标准调制技术.为了保证传输信号的最优化,信道估计是OFDM系统必需的部分.介绍数字电视广播系统中OFDM信道估计几种算法的优缺点.

Because of the high frequency utilization ratio, effective resistance of muhipath interference and narrowband interference etc. , the Orthogonal Frequency Division Multiplexing technology is adopted as the standard modulating technology by the high-definition digital television system. In order to pursuit the optimal signal transmission, channel estimating must be conducted in OFDM system. This paper introduces the advantages and disadvantages of several algorithms of channel estimating in OFDM system.