The transmission performance of spatial multiplexing cross-polarized MIMO is studied to determine how to increase the capacity of digital terrestrial broadcasting and make it more robust. In this paper, the performance was evaluated in laboratory experiments and large-scale field experiments in central Tokyo under three deployment scenarios. The results showed that the required received power can be improved by 7.3 dB when MIMO is introduced to enhance transmission robustness, i.e., maintaining the same transmission capacity as SISO. Alternatively, the transmission capacity can be doubled by introducing MIMO for the same robustness as SISO, requiring a slight increase in received power of 0.9 dB compared with SISO. The field experiments were performed by using a prototype transmission system for advanced digital terrestrial TV broadcasting in Japan, but the results obtained are also valid for 5G broadcasting. Regarding the feasibility of the advanced terrestrial broadcasting system operating at a target bit rate of about 60 Mbps to distribute a VVC-based 8 K program within a 6-MHz channel bandwidth, an increased received power of 3.7 dB compared with SISO was required for MIMO to achieve a higher transmission capacity in the worst case for 28 reception points evaluated in urban areas.

研究了空间复用交叉极化MIMO的传输性能，以确定如何增加数字地面广播的容量并使其更健壮。本文在三种部署方案下，在东京市中心的实验室实验和大规模现场实验中对性能进行了评估。结果表明，当引入MIMO以增强传输鲁棒性（即保持与SISO相同的传输容量）时，所需的接收功率可以提高7.3 dB。或者，通过引入MIMO以达到与SISO相同的鲁棒性，可以使传输容量增加一倍，与SISO相比，接收功率需要略微增加0.9 dB。通过使用用于日本高级数字地面电视广播的原型传输系统进行了现场实验，但获得的结果也适用于5G广播。关于以大约60 Mbps的目标比特率运行以在6 MHz的信道带宽内分发基于VVC的8 K节目的高级地面广播系统的可行性，与SISO相比，MIMO需要增加3.7 dB的接收功率在最坏的情况下，为城市地区评估的28个接收点实现更高的传输容量。