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Structure‐function‐based approach to analyzing received signals for spaced antenna radars
Author(s) -
Praskovsky Alexander A.,
Praskovskaya Eleanor A.
Publication year - 2003
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 - 10.1029/2001rs002544
Subject(s) - antenna (radio) , radar , moment (physics) , scattering , computer science , function (biology) , computation , physics , algorithm , acoustics , mathematics , telecommunications , optics , classical mechanics , evolutionary biology , biology
This paper describes an alternative approach to analyzing multiple received signals for spaced antenna radars. The approach is based on computation and analysis of the different order auto and cross structure functions (SF) for the received signal's power. SF of order p ≥ 2 is the p ‐th order statistical moment of the difference between signals. Equations for cross and auto SF at p = 2 and 4 are derived for a spaced antenna radar with a vertically directed transmitted beam. SF parameters in these equations are related to the mean horizontal velocity components and turbulence characteristics of a scattering medium. Theoretical limitations on applying the derived equations to a specific radar are presented. Advantages and shortcomings of the proposed approach with respect to the correlation function and spectra‐based approaches are discussed as well. The major advantage of the proposed approach is that SF of any order p ≥ 2 can be derived and applied to practical measurements; the higher‐order SF provide additional information about the scattering medium.