摘要
给出了中国地面数字电视广播传输标准(DTMB)的典型工作模式在AWGN信道下实测信噪比门限与信道传输理论值之间的差距,并从时频带宽积、编码调制、系统实现3个方面依次分析信噪比损失的原因。信噪比损失的分析结果表明:DTMB的编码调制尚有3.43 dB的潜在增益可以挖掘,分析结果有助于指导系统的改进。
In this paper,the gaps between actual SNR threshold in DTMB typical mode over AWGN channel and theoretical transmission limit are provided and analyzed in details from the following three aspect： resources in terms of time-frequency product,coded modulation,system design and implementation.The numerical results show that coded modulation in DTMB has the potential of 3.43 dB in SNR to be improved,which is helpful to guide further improvements in system design.
出处
《电视技术》
北大核心
2010年第12期23-24,33,共3页
Video Engineering
基金
清华大学自主科研计划资助(20091081280)
