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Statistics for ionospherically diffracted VHF/UHF signals
Author(s) -
Rino C. L.,
Fremouw E. J.
Publication year - 1973
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs008i003p00223
Subject(s) - nakagami distribution , ultra high frequency , gaussian , diffraction , range (aeronautics) , monochromatic color , weibull distribution , statistics , mathematics , amplitude , fresnel zone , physics , statistical physics , optics , computer science , telecommunications , decoding methods , materials science , quantum mechanics , fading , composite material
In this paper a general characterization of the statistics for an ionospherically diffracted, monochromatic plane wave is presented. The main results are restricted to weak scatter, although two possible extensions that accommodate large phase perturbations and multiple scatter are discussed. A detailed discussion of the first‐order statistics of amplitude is given. The general Gaussian distribution is discussed together with its Nakagami‐distribution approximation and the log‐normal distribution. By using a segment of ATS‐3 satellite data recorded at Lima, Peru, we show equally good fits to Gaussian and log‐normal distributions at least for the limited dynamic range available. The Nakagami distribution provides only a poor approximation. A transverse scale size of 600 m is inferred, which we believe is representative of the nearly linear dependence of the measured field's correlation distance on the Fresnel‐zone radius.