RMS DELAY SPREAD ESTIMATION FOR TROPICAL AREA DURING RAIN EVENT

A radio wave propagation in many Tropical area undergoes signal attenuation due to depth of the foliage, losses due to rain, seasonal variations etc. The propagation of Radio signals in vegetational area during rain event is an important issue which impacts on the present and future scope of the ultra-wideband technology .Hence in this paper a mathematical model is developed to estimate the RMS Delay spread characteristics of the channel for single reflections of signals for various rain fall rates. Applications The results of this investigation are discussed, covering density of the trees, foliage type in the presence of line-of-sight (LOS) and non-line-of-sight (NLOS) paths. Simulation results shows that the RMS Delay spread of the transmitted signal increases during a rain event (wet season) and it is observed that it decreases during no rain event (dry season).