Wireless Access System: Design and Performance of a Millimeter-Wave Video-Transmission System Using 60-GHz Band for Indoor BS Signals Transmission

Many systems using millimeter-wave (MMW) bands have recently been developed in the United States, Europe, and Japan. They include home-use wireless-link systems (home links), fixed wireless access systems (FWA), multi-point video distribution systems (MVDS), and wireless local area networks (W-LAN)[1]~[8]. In particular, the 60-GHz band is considered suitable for short-range wireless applications such as home-links under high atmospheric attenuation[9]. These systems use the 60-GHz band to achieve high bit-rate transmission across a wide frequency band. The Telecommunications Technology Council of the Ministry of Public Management, Home Affairs, Posts and Telecommunications (formerly, the Ministry of Posts and Telecommunications) was set up in Japan to introduce systems using the 60-GHz band, and regulations concerning this band were published in August 2000. A MMW video-transmission system[8] was earlier proposed by the Council as a potential system using the 60GHz band. The MMW video transmission system is an alternative to the feeder line that can connect outdoor broadcasting reception antennas with indoor television set (TV). The video signals (multiple broadcasting signals) are transmitted on the MMW band in the system. This system can effectively reduce the amount of electrical wiring that is used in portable and wall-mounted TVs. Such a reduction is an advantage since these devices are becoming more and more popular. The MMW band appears to be especially suitable for wideband systems because broadcasting signals require a wide frequency band[15]. When designing the MMW link for the system, it must be ensured that the local oscil-