The analysis of surface waveguide for propagating radio waves in uhf band (T-0431) (MFN 6208)

Abstract

In wireless communication, the next generation systems are focusing on supporting different applications, e.g. interactive media on interchanged packet systems. The factual investigations of these systems and the issues and challenges associated with them are of interest to the researchers all the time. Recently researchers are gathering data of radio waves signal in the regions of interest at the different points of the path to decide or construct a relationship between refractivity and the propagation of the signal. The aim of this work is to apply an accurate path loss prediction technique to demonstrate the need for a precise accounting of the refraction when planning future radio networks as sometimes it is expensive or not possible to use high power transmitters all the time. The quantitative assessment of refractivity for different cities of Pakistan to improve forecasts in signal strength and to reduce propagation losses which lead to fading, inter-symbol interference for different frequencies of operation is the objective of this research. The investigation will help in minimization the forecast issues which is identified in signal strength by the communication designers. In general, the relationship between refractivity and propagation of signal is found to be inverse in nature most of the time. However, more precisely the results as shown in this work are providing a clearer picture of the relationship that exists between refractivity and propagation, depending on the behaviour of temperature, pressure and humidity. The meteorological parameters are playing key role to tropospheric refractivity under standard atmospheric conditions during which radio waves propagates and degrade from transmitter to receiver. The meteorological information from the climate stations informs about radio refractivity of the selected zones which influences the quality of radio waveform transmitted as well as received with refractivity identified in its standard form. This research is attempting to identify the effects of radio refractivity on signal strength after regular intervals in a day, week and month by analysis of surface waveguide for propagating radio waves in UHF band. The main theory of signal propagation in different weather conditions and exact the meteorological information of a day, week and month which is used to identify the variation in refractivity. The analysis in this report provides information to explore and analyse the causes of the path losses, the degradation of the signal quality and the reduction in coverage area in wireless communication system.