OFDM地面数字电视广播系统的PAL同频干扰消除

An Analogue PAL Co-Channel Interference Cancellation Algorithm for OFDM-DTTB Systems

提出了一种应用于正交频分复用(OFDM)地面数字电视广播系统的逐行倒相正交平衡调幅(PAL)制模拟同频干扰消除算法.利用了PAL信号的行间相关性,在频域完成干扰估计.仿真结果表明,该算法能有效降低存在模拟PAL同频干扰时,OFDM地面数字电视广播(DTTB)系统的误比特率(BER).

An analogue phase-alternative line （PAL） co-channel interference cancellation algorithm is proposed to improve the robustness of orthogonal frequency division multiplexing （OFDM）based digital television terrestrial broadcasting（DTTB）systems： The proposed algorithm estimates interference in frequency domain using the similarity between two adjacent scanning lines. Simulation shows that the algorithm can effectively improve the bit error rate （BER） performance of the OFDM-DTTB receiver in presence of PAL co-channel interference.