Robert W. Hubbard

Abstract: This report describes an experiment designed to measure the performance of digital microwave radio systems in a line-of-sight (LOS) link that is subject to strong atmospheric multipath. It outlines the measurements made to characterize the propagation medium, the status of space-diversity receiver systems equipped with switched combiners, and the burst-error statistics caused by the multi path environment. The results presented in this report compare the performance of two radios, operating simultaneously in the same transmission channel. Detailed error distribution data have not yet been analyzed.

Keywords: impulse response; digital communications; atmospheric multipath; adaptive equalization

Disclaimer: Certain commercial equipment, components, and software may be identified in this report to specify adequately the technical aspects of the reported results. In no case does such identification imply recommendation or endorsement by the National Telecommunications and Information Administration, nor does it imply that the equipment or software identified is necessarily the best available for the particular application or uses.

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