Algorithms Used in ARROWS: Autodesign of Radio Relay Optimum Wideband Systems

摘要

The report describes the mathematical models used in the ARROWS programs. These programs, which run on a desktop computer, automate the calculations involved in the design of line-of-sight microwave radio relay links. The programs calculate, tabulate, and plot information about Earth geometry, terrain profiles, ray paths, repeater-reflector geometry, median basic transmission loss, variability of loss, equipment effects, and link performance. Each model is selected on the basis of its acceptance within the communications industry and the size and type of data base supporting the model. The computer hardware and software configurations are designed to be convenient to operate and to give the design engineer immediate access to calculated results corresponding to changes in design parameters. The programs corresponding to these algorithms are designed to be used interactively by persons having no experience in programming. The algorithms are applicable over a wide range of link parameters. The frequency range is from 1 GHz to 20 GHz. Path lengths should be less than 150 km.