NTT, DOCOMO, NEC Demonstrate 140 Gbps in 80 GHz
NTT Corporation, NTT DOCOMO, INC. and NEC Corporation have announced that they demonstrated a real-time bidirectional wireless transmission in the millimeter wave band between 71 GHz and 86 GHz that achieved a bit rate of 140 Gbps-unprecedented for sub-100 GHz frequencies. The test demonstrated that OAM (Orbital Angular Momentum) mode multiplexing transmission technology can increase the capacity of wireless transmission, and that OAM-mode control technology can increase wireless transmission distances by using reflected paths. The achievement is expected to help realize high-capacity wireless transmissions to meet future demand anticipated in the 2030s.
OAM-mode multiplexing technology increases the capacity of wireless transmissions between fixed stations by transmitting multiple radio waves, each carrying signals multiplexed with different OAM modes, at the same frequency and time. Transmissions exceeding 100 Gbps enable both optical-fiber and wireless connections for communication lines between fixed stations, facilitating the construction of flexible backhaul networks,*1 wireless connections with mobile base stations during events, and temporary lines during disasters. The research results are expected to contribute to the development of high-capacity wireless backhaul for future services such as virtual reality (VR), augmented reality (AR) and high-definition video transmission in 6G and beyond.
The results will be presented at the Wireless Communications and Networking Conference (WCNC).
The three companies will explore applications such as relay transmission using real-time, high-capacity wireless communications and will apply OAM-mode multiplexing technology to wireless backhaul and fronthaul networks. They will also seek to increase wireless transmission capacity and extend transmission distances in millimeter-wave and higher frequency bands. Ultimately, they aim to establish flexible network infrastructure for future services such as VR, AR, ultra-high-definition video transmission, connected vehicles and remote medical applications in the 6G era and beyond.
