Measured relative performance of antenna pattern diversity, antenna angle diversity and vertical space diversity in Mississippi

Presents the results of an experiment to test the relative performance of antenna pattern diversity, antenna angle diversity, and vertical space diversity for line-of-site microwave digital radio. The experimental results indicate that if the outage time is due to thermal noise it is not negligibly small compared to that caused by multipath dispersion, the diversity improvement factor of vertical space diversity is greater than those of antenna pattern diversity or antenna angle diversity by at least one order of magnitude. Thus, if thermal noise fade margin is not substantially greater than the dispersive fade margin, vertical space diversity is preferred