China has made important breakthroughs in the research and development of 6G communication technology

China has made important breakthroughs in the research and development of 6G communication technology.

    According to the second Academy of Aerospace Science and Industry, 25 institutes of the Second Academy of Aerospace Science and Industry recently completed the first real-time wireless transmission experiment of terahertz orbital angular momentum in Beijing. The high precision helical phase plate antenna was used to realize four different beam modes in the 110GHz band, and 100Gbps wireless real-time transmission was completed on the 10GHz transmission bandwidth through the synthesis of four modes. The bandwidth utilization rate has been improved to a maximum extent, which provides important support and support for the development of the 6G communication technology.

    It is understood that the traditional back transmission technology as long as there are two: wireless back transmission, optical fiber back transmission. From the perspective of global statistics, wireless backtracking is used in most networks, but it is just the opposite in China. Because the reliability of optical backtracking is stronger than that of wireless backtracking, and although optical backtracking requires the laying of communication fiber in a large area, the human cost and land use cost themselves are not high in China, so wireless backtracking is only used in a few emergency scenarios. However, with the rapid explosion of 5G and the continuous improvement of communication rate demand, the mobile communication frequency band is extended to millimeter wave and higher terahertz frequency band, the signal transmission loss increases greatly, the deployment density of base station will increase exponentially, and the cost of all-fiber networking makes it difficult for operators to bear.

    In the 5G/6G communication era with "highly dense" base stations, traditional fiber-based bearer network transmission will face high cost, long deployment cycle, poor flexibility and other problems, and wireless backtransmission technology will gradually occupy a dominant position. According to the research report, by 2023, more than 62% of base stations worldwide will use wireless relay.

    As a new spectrum technology, terahertz communication is becoming one of the key technologies for 6G communication, which can provide larger transmission bandwidth and meet the demand for higher transmission rates, the Global Times reported. In the future, the peak rate of 6G communication will reach 1Tbps, so it is necessary to further improve the utilization rate under the existing spectrum resources to achieve higher wireless transmission capability.

    Since 2021, aiming at the hot demand of 6G communication and keeping up with the forefront of international communication technology, the 25 Institute has chosen terahertz orbital angular momentum communication as a new breakthrough direction to realize multiplex signal multiplexing transmission in the terahertz frequency band, complete ultra-large capacity data transmission, and increase the frequency spectrum utilization rate by more than two times. In the future, the technology can also serve the short-range broadband transmission field of 10m to 1km, provide support for the high-speed transmission between lander and cruiser for lunar exploration and fire exploration, the cable-free bus transmission inside spacecraft and other aerospace applications, and provide information support for China's deep space exploration and the research and development of new spacecraft.