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Ka ‐Band pulsed propagation through rain‐filled atmosphere
Author(s) -
Maitra A.,
Chowdhury A. S.,
Das A.
Publication year - 2001
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.1233
Subject(s) - attenuation , dispersion (optics) , bandwidth (computing) , optics , microwave , physics , radio propagation , narrowband , phase distortion , signal (programming language) , distortion (music) , acoustics , materials science , computational physics , telecommunications , phase (matter) , engineering , computer science , amplifier , quantum mechanics , programming language , astronomy
An atmosphere of rain offers a dispersive medium for the propagation of radio signals above 10 GHz. The effect of dispersion, in terms of differential attenuation and phase dispersion, is insignificant for narrowband signals. Signals modulated with very short pulses can have a wide bandwidth over which dispersion will be appreciable, causing significant signal distortion. The propagation of pulsed signals under varying propagation conditions has been studied with the Fourier transform technique. The transfer function of the rain atmosphere is obtained using propagation models that include clear‐air effects and scattering effects due to raindrops. The carrier signal at 30 GHz is considered to be modulated by a raised‐cosine pulse with a base bandwidth of 1–3 GHz. A technique for the mitigation of pulse distortion using an FIR filter is presented to restore the distorted pulse to its original shape and position to a significant extent. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 30: 105–109, 2001.