The start of terrestrial digital broadcasting has led to increasing needs relating to the multiplex wireless transmission of uncompressed hi-vision (HDTV) signals by broadcasting stations. At the Microsystem Integration Laboratories, we are researching a 120-GHz-band millimeter-wave wireless system that should implement transmission speeds at the 10 Gbps level. This wireless system will enable the transmission of 10 Gigabit Ethernet (10 GbE) signals and also enable the wireless transmission of up to six HDTV signals simultaneously without delays, in combination with the IP multiplexing and distribution system “i-Visto” that NTT has developed. We are currently conducting collaborative experiments with TV stations using this multiplex wireless transmission system, aimed at commercial viability.
Features
This wireless system implements data transmission at 10 Gbps, by using ultra-high-frequency carrier signals in the 120-GHz band. It also uses field-effect transistors (HEMT) that are chemical compound semiconductor devices which generate, modulate, and amplify millimeter-wave signals in the 120-GHz band at ultra-high speeds.
Application
In the production of programs at TV stations, this technology makes it possible to produce hi-vision footage with no delays or image degradation, from multipoint relays such as hi-vision relays or from golf courses, in locations where it has been difficult to lay optical cables in the past.
