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Abstract Although troposcatter communications have been knwon since world war II, they are receiving very much interest recently to realize long distance beyond the horizon military and civil communications. The recent interest in this field is due to the advances in methods of enhancing troposcatter channel performance acid overcoming its fading nature. However, models available Co predict ti,oposc;0Aer channel performance are based oil average meteorological conditions and assumed models for refractive index intiomogenei ties statistics in tile tropos¬phere. The main interest in this tli(,,,i.s is t.o review the models and theorem that describe the prediction of troposcatter channel parameters. A novel generalized model is also present¬ed , takin-1, into account flip. instantaneous variations in meteorological conditions and the threeimensional nature of the scattering proct—:~. This model is applied to predict. the delay power spectrum and frequency correlation function of troposcatter links at different assumed meteorological conditions and propagation distances. The methods of improv¬ing the perl’ol-milllco of the troposcatter channel are also reviewed. . |