6 G 无线空口传输技术研究进展与展望t

Since the 1980s, mobile communication has thoroughly transformed the world, profoundly impacting the daily lives of humans. With the successful commercialization of 5G, people are now pondering what 6G will be. As the next generation of mobile communication systems, 6G not only imposes higher requirements on communication KPI such as spectrum efficiency, latency, and reliability but also involves new elements, such as artificial intelligence and sensing, far beyond the scope of traditional mobile communication. In order to realize the vision of 6G, there is an urgent need for the industry to research advanced wireless technology solutions that are compatible with these new technologies. This paper focuses on the technical trends and progress of several research directions in the 6G wireless air interface, including channel coding technology, multiple access and waveform technology, intelligent metasurface technology, intelligent MIMO technology, etc. Moreover, we propose and preliminarily verify a series of innovative technical points, such as free-ride codes and multiple access based on lattice code. The proposal of these innovative technologies provides strong support for the realization of the vision and KPI of 6G.