LTE-based 5G terrestrial broadcasting, standardized in 3GPP Release 16, allows broadcasters to reach cellular devices. In this paper, toward the development of a future terrestrial broadcast system in Release 18 or later called 5G-Advanced, a specification for New Radio (NR) based 5G terrestrial broadcasting is presented for a 6 MHz-channel raster, which is used in current digital terrestrial television broadcasting. The transmission performance is evaluated in physical layer simulations. In particular, the spectral efficiency is evaluated and compared with a second-generation DTTB system at a required carrier-to-noise ratio (CNR) of 20 dB in a fixed-reception scenario with a rooftop receiving antenna. The evaluation in an additive white Gaussian noise channel indicates that the spectral efficiency of NR-based 5G terrestrial broadcasting can be improved by 0.83 (bps/Hz) by enhancing the code length of low density parity check code, the carrier modulation scheme, guard band ratio, and cyclic prefix ratio from what available so far in Release 16. Furthermore, when frequency interleaving is incorporated, the spectral efficiency is increased by 0.75 (bps/Hz) in a short echo channel with a desired-to-undesired signal power ratio of 0 dB. The introduction of time interleaving increases spectral efficiency by 0.97 (bps/Hz) in an impulsive interference channel with a carrier-to-interference signal power ratio of −20 dB. For each interleaving, the increase in spectral efficiency tends to be higher as the required CNR increases.

中文翻译：

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基于 NR 的固定接收 5G 地面广播系统的频谱效率评估


基于 LTE 的 5G 地面广播在 3GPP 第 16 版中标准化，允许广播公司覆盖蜂窝设备。在本文中，为了开发版本 18 或更高版本（称为 5G-Advanced）的未来地面广播系统，针对 6 MHz 信道光栅提出了基于新无线电 (NR) 的 5G 地面广播规范，该规范用于当前的数字地面电视广播。传输性能在物理层模拟中进行评估。特别是，在屋顶接收天线的固定接收场景中，在所需的载噪比（CNR）为20 dB的情况下，评估了频谱效率，并与第二代DTTB系统进行了比较。在加性高斯白噪声信道中的评估表明，通过增强低密度奇偶校验码的码长、载波调制方案、保护带，基于NR的5G地面广播的频谱效率可以提高0.83（bps/Hz）比率和循环前缀比率来自版本 16 中迄今为止可用的比率。此外，当合并频率交织时，短回波信道中的频谱效率提高了 0.75 (bps/Hz)，具有所需信号与不需要信号功率比0分贝。时间交织的引入将脉冲干扰信道中的频谱效率提高了 0.97 (bps/Hz)，载波与干扰信号功率比为 -20 dB。对于每次交织，随着所需 CNR 的增加，频谱效率的增加往往会更高。