Measurement and Analysis of Urban Radio Channels for Communication System Design
AffiliationU.S. Department of Transportation
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AbstractThis paper outlines a program to measure VHF and UHF urban radio channels for playback and analysis in the laboratory. These measurements are required for the design of high data rate communication equipment which makes efficient use of the radio spectrum. We include in this category data communication and surveillance equipment necessary to meet the demands of the variety of command and control functions envisioned for transportation systems by federal, state, and local governments. Included in the paper is a qualitative description of the channel followed by a discussion of the measurement techniques and hardware that will be used. The goal of the measurement program is to develop both analytic and experimental tools for the design and evaluation of advanced communication techniques specialized for signalling over the urban radio channel. These techniques will include modulation waveform design, coding, and the design of receiver structures including those which adapt to measured channel behavior. Future technology will permit complex hardware designs to be used in the implementation of these techniques while maintaining low system cost. The same techniques and approach used here for the urban channel can be applied to other radio channels that occur in transportation systems. In particular, they are applicable to data links for air-ground and high speed ground transportation system uses.
SponsorsInternational Foundation for Telemetering