NTT And Fuji TV To Demo Millimeter-Wave Wireless Communication System At BIRTV 2007

Tokyo -- Nippon Telegraph and Telephone Corporation (NTT) and Fuji Television Network, Inc. (Fuji TV) announced they will hold a public demonstration of wireless transmission of HD signals using 120-GHz-band millimeter-wave wireless technology during the BIRTV 2007 exhibition at Booth 8A17, August 22 - 25 in Beijing, China. BIRTV is China's premier exhibition for the content acquisition, creation, production, and distribution industries.

Existing wireless systems cause a time delay when uncompressed HD signals are transmitted. NTT and Fuji TV showed that a 120-GHz-band wireless communications system can transmit multi-channel uncompressed HD signals without a delay at a public trial at Odaiba, Tokyo (2005) and at several exhibitions, including InterBEE 2005 (Japan), NAB 2006 (USA), and IBC 2006 (Europe). For NTT and Fuji TV, the upcoming demonstration in Beijing, where the Olympic Games will be held next year, is the most suitable public display of their 120-GHz-band wireless technology.

At BIRTV 2007, NTT and Fuji TV will show the effectiveness of their 120-GHz-band wireless system, which is a combination of NTT's wireless communication and Fuji TV's program production technologies. There is a strong demand for a "zero-delay" HD-SDI wireless transmission system in the broadcasting field. However, conventional field pick-up units (FPUs) need HD-SDI signals to be compressed due to limitations in the transmission bandwidth, which causes time delays. The latest 60-GHz-band wireless links can transmit one-channel HD-SDI signal, however, it can not transmit multi-channel HD-SDI signals. The 120-GHz-band wireless system enables 6-channel uncompressed HD-SDI signals to be transmitted because its maximum data rate is 11.1 Gbps. Furthermore, the system uses high-speed HEMT-MMICs, which makes it compact, means it consumes less power, and enables it to be battery powered. The atmospheric attenuation of the 120-GHz-band millimeter-waves is much lower than that of 60-GHz-band millimeter-waves. Therefore, the 120-GHz-band wireless system can transmit HD-SDI signals over a distance of 2 km under fair atmospheric conditions.

This work has been supported as part of "The research and development project for the expansion of radio spectrum resources" of the Ministry of Internal Affairs and Communications, Japan.

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•Brochure: Demonstration Of Uncompressed HDTV Signal Transmission Over A Wireless Link

SOURCE: NTT Science and Core Technology Laboratory Group