【摘要】 对采用基于OFDM技术的地面数字电视广播信号为非合作式照射源的发射信号恢复技术作了系统的分析、讨论,提出了可以利用事先获知的OFDM符号周期的长度、子载波的频率及个数、子载波的调制方式等信息来构建一个FIR自适应滤波系统,从而可以从受地面噪波干扰的传输信号中恢复出原始的发射信号。更多还原

【Abstract】 A comprehensive research on adaptive equalization of digital terrestrial TV signal based on OFDM as illumination is conducted, and a FIR adaptive detector which is built on some prior knowledge of the statistics of transmitted signal is introduced.. It is shown that detector has good performance for the reconstruction of the statistic information of transmitted signal from direct-path signal.更多还原