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This paper describes mobile propagation measurements made in support of the Federal Aviation Administration's (FAAs) program to develop a very high frequency (VHF) digital air/ground communication system architecture to be used for air traffic control (ATC). A significant challenge to the measurement program was the requirement to conduct tests in the VHF radio communication band currently utilized for safely critical aeronautical applications using commercial-off-the shelf products. The power constraints on the measurement tests required the development of a measurement system that uniquely improved the processing gain within a confined test emission spectrum. This paper details the measurement techniques that address these challenges and provides results of both fading and time dispersion characterization of the mobile channel.
Dyer et al. (Wed,) studied this question.