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Characterization of multipath parameters for line-of-sight microwave propagation

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1 Author(s)
Parl, Steen A. ; Signatron, Inc., Lexington, MA, USA

Ray equations are derived for microwave multipath propagation in a two-layer atmosphere, and the connection between the different solutions is demonstrated by numerical examples. Analytical expressions are developed to characterize the condition for multiple rays, the variation in angle-of-arrival (AOA), and the delay spread. The results suggest that more than three rays will be rare in practice and that the three-ray model (obtained from the zero-order rays defined in the paper) may provide a good representation of selective fading on microwave links.

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Antennas and Propagation, IEEE Transactions on  (Volume:31 ,  Issue: 6 )