基于OFDM的数字电视地面广播信道模型及信道状态信息提取

Channel Models for DTTB and Abstract Method for CSI Based on OFDM

基于OFDM的数字电视地面广播信道模型分为接收信号高斯信道和Ricean信道模型。在OFDM系统中,信道状态信息定义为载波位置的信噪比,采用归一法计算平均噪声功率以获取信道状态信息(CSI)。

Channel model of digital television terrestrial broadcasting (DTTB) based on orthogonal frequency sivision multiplexing (OFDM) is divided into gauss and Ricean channel models. In OFDM system, the information of channel state information (CSI) is defined as Signal-to-Noise for position of carrier wave. The power of average noise is calculated with iterative method to obtain CSI.