NTT Research and Development 2009 Review of Activities

Overview

This system utilizes a millimeter band (120-GHz frequency band) not yet used industrially and provides high-speed wireless transmission (10 Gbit/s). These features make wireless transmission of uncompressed High Definition Television (HDTV) images on six-channel possible. In 2008, at live broadcast sites at the Beijing Olympic Games, video material transmission tests using the wireless system were carried out in collaboration with Fuji Television network Ltd., and the practicality of the system was thereby confirmed. From now onwards, this technology can be applied to, for example, large-capacity ad-hoc circuits and wireless communication between buildings equipped with 10G Ethernet.

Features

• As a world's first, uncompressed HDTV-image transmission on six channels is possible wirelessly
• Transmission over maximum distance of 3 km is possible (under clear skies with forward-error-correction device used)
• Utilizing MMIC^* developed at NTT Laboratories achieves compactness, weight-saving, and low power consumption with equipment of the same size and operability as existing wireless equipment for transmitting broadcasting contents
• Industrially untapped frequency band (120 GHz) is utilized, contributing to expanding radiowave resources

Application scenarios

• Video-content transmission (without delay or picture degradation) from live broadcast sites like golf tournaments
• Large-capacity link-up line for areas where optical fiber is difficult to lay
• Ad-hoc large capacity lines for handling natural disasters, events, etc.

• * MMIC: Monolithic Microwave Integrated Circuits

• Part of this research was performed as a research project called "Research and Development for Expanding Radiowave Resources" funded by the Ministry of Internal Affairs and Communications.