本文提出一种8K超高清地面数字电视传输系统。该系统基于国际上现行的地面数字电视多媒体广播演进标准（DTMB-A），采用双天线极化、信道绑定等技术来提高数据传输率，可支持8K超高清视频传输灵活高效的业务需求。经过硬件实现和测试，本系统在实验室测试和外场试验中均取得了理想效果：双天线极化方案的正交极化隔离度可达到约 22 dB，系统最高可支持100bps的有效数据率；进一步，采用4路信道绑定方案的传输速率最高可达到200 Mbps，该方案在深圳进行的外场试验中实现了国内首次基于地面数字电视无线广播的8K超高清视频直播。上述分析和测试结果验证了本文所提方案的有效性。

This paper presents an 8K ultra-high definition terrestrial digital television transmission system. Based on the DTMB-A standard widely used in the worldwide, the system could adopt dual cross-polarization antennas or channel bonding schemes to support flexible and efficient services of 8K UHD video transmission. The system has achieved satisfactory results in indoor and field trials after hardware implementation and tests, where the cross-polarization isolation (XPI) in cross-polarization scheme can reach up to about 22 dB, and the maximum transmission rate of the channel bonding scheme can be up to 200 Mbps. Furthermore, the 8K live broadcast system was realized for the first time in China based on digital terrestrial television broadcasting in Shenzhen using 4 channel bonding. A series of analysis and test results could indicate the effectiveness of the proposed system.