Indoor and outdoor propagation measurements at 5 and 60 GHz for radio LAN application

A variety of measurements were taken at 5 and 60 GHz to give a better understanding of radio channels intended to be used for radio LAN (local area network) application. The measurements included swept frequency, delay spread, and angle of arrival measurements (at 60 GHz) as well as investigations of space diversity. The measured delay spread requires equalization or special modulation schemes like COFDM if high data rates are to be transmitted. At 60 GHz the utilization of directional antennas is an alternative for discriminating against delay spread. This measure may be used in elongated radio cells.<>