摘要
本文分析了欧洲第二代数字地面电视广播标准(DVB-T2)的性能损失原因。从香农极限到最终系统实现,这些损失主要来源于三个方面:时频带宽积损失、非理想编码调制技术损失、以及系统实现造成的损失。上述分析指出了DVB-T2系统性能损失较大的部分,为将来系统的改进提供指导。
The performance degradation of each step from Shannon limit to implementation for the second generation digital video broadcastingterrestrial(DVB-T2) system is analyzed in this paper, from three aspects: the time-frequency bandwidth loss, imperfect coded modulation scheme, and other implementation issues. The analysis results intuitively show the weak parts that still exist in the DVB-T2 system, and also provide guidelines for system improvement in the future.
出处
《广播与电视技术》
2014年第3期128-132,共5页
Radio & TV Broadcast Engineering
关键词
DVB-T2
性能分析
时频带宽积
平均互信息
信噪比损失
DVB-T2
Performance evaluation
Time-frequency bandwidth
Average mutual information(AMI)
Signal-to-noise ratio(SNR) loss
