Phase and amplitude diversity in over-water transmissions at two microwave frequencies

Abstract

Propagation measurements at 9.4 and 9.2 Gc/s were made over a 47 km, line-of-sight, over-water path at Eleuthera Island in the Bahamas. The purpose was to study the signal amplitude and phase variations at the two frequencies, and in particular, the variations in the phase difference and amplitude ratio ("differential amplitude") of the two frequencies. The results include power spectra of phase and phase difference variations (from about 10 to 4 c/s) and cumulative distributions of amplitude, differential amplitude, and phase difference. 1.

Sound propagation in the atmosphere: Analysis of signal amplitude and phase temporal and spatial variations

“…For example, during the period when substantial interest existed in the performance of microwave relay links Janes et al (1965Janes et al ( , 1970 compared the phase and amplitude variations of different radiowave frequencies. Fried's (1969) paper is an example of an nptical study in which amplitude scintillations of starlight were investigated.…”