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数字地面电视是一种现代广播技术,广播公司使用该技术提供带有高质量影像和声音的电视服务。本文主要讨论了,在现代数字广播系统中应用编码协作多输入、多输出MIMO传输方案,实现额外的发射分集和编码增益。主要思想是,基于低密度奇偶校验码实现一个编码协作MIMO方案。编码协作传输可以获得健壮的向前纠错能力。通过这种方式,可以实现更稳定的系统性能,提高下一代手持系统的移动性。为了展示潜在的实际应用,基于第二代地面数字电视广播(DVB-T2)系统对该方法的性能进行了评估。仿真结果表明,此方法可以用于支持高移动手持设备的DVB广播系统的发展,例如下一代手持数字电视广播(DVB–NGH)系统。
Digital terrestrial television is a modern broadcast technology that broadcasters use to deliver television services with high quality video and sound. This article focuses on the application of code-cooperative multi-input, multi-output MIMO transmission schemes in modern digital broadcasting systems to achieve additional transmit diversity and coding gain. The main idea is to implement a coding cooperative MIMO scheme based on low-density parity-check codes. Coded cooperative transmission can obtain robust forward error correction capability. In this way, more stable system performance can be achieved and the mobility of the next generation of handheld systems can be improved. To demonstrate potential practical applications, the performance of this method was evaluated based on the DVB-T2 system. The simulation results show that this method can be used to support the development of DVB broadcasting systems with high mobile handsets, such as the DVB-NGH system.