DEVELOPMENT OF A MODIFIED LINK BUDGET FORLOW EARTH ORBITING (LEO)-BASED LAND MOBILE SATELLITE COMMUNICATIONS SYSTEM

📄 Project Abstract

This research work presents the development of a Modified Link Budget for Low Earth Orbiting (LEO)-Based Land Mobile Satellite Communications System operating at Ku, K and Ka frequency bands by taking into cognizance the effect of additional loss due to Doppler frequency shift. Doppler frequency shift poses the problem of receiving higher or lower frequencies than the original transmitted frequency, this may be as a result of a relative movement between the source of the signal and the object (satellite or receiver) or both. In satellite communication system, this phenomenon constitutes the problem of signal loss.Effect of Doppler shift on satellite link budget is assumed negligible in conventional approach thereby resulting in the design of an unrealistic link budget, particularly in Low earth orbit (LEO) where it is more pronounced. In view of this, a more reliable approach to the estimation of satellite link budget at Ku, K, and Ka bands by the inclusion of Doppler frequency shift e...