As time-variant multipath channels, the time-variant property of MW and SW channels causes the interchannel interfere ( ICI) between different subchannels of OFDM-based digital amplitude modulation broadcasting ( DAMB) system. 作为时变的多径信道,中短波信道的时变性导致基于OFDM数字调幅广播系统各个子信道间产生干扰,简称ICI。