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Computer simulation of HF frequency‐selective fading and performance of the mode‐averaging diversity combiner
Author(s) -
Kawachika N. M.,
Villard O. G.
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/rs008i003p00203
Subject(s) - fading , computer science , mode (computer interface) , basis (linear algebra) , ray tracing (physics) , algorithm , antenna (radio) , acoustics , telecommunications , mathematics , optics , geometry , physics , decoding methods , operating system
A ray‐tracing technique for simulating the performance of the mode‐averaging diversity combiner (MADC) [ Villard et al. , 1972] is described, which extends the methods developed by Croft [1969] to the analysis of frequency‐selective fading. It is shown that the computer procedure satisfactorily predicts observations made during a test representative of conditions encountered in practice. Using the parameters of this test, the method is applied to the original MADC configuration to investigate the dependence of performance on antenna spacing and ionospheric profile. Two MADC schemes which incorporate alternative methods of forming the running average are described. Their performance is also evaluated for the above parameters and shown to be roughly equal to that of the original. It is concluded that for the given parameters at least, a choice between the three alternative configurations can be made on the basis of convenience.