Link Analysis Model for Direct Broadcast Satellites Case of study: Benghazi and Sebha

Abstract

Electromagnetic waves during radio propagation between a satellite and the earth station suffer from several atmospheric effects such as noise, rain and atmospheric attenuations which results in power loss. The successful implementation of satellite wireless communications requires robust air links providing the uplink and downlink paths for the communications signals. However, transmission through the atmosphere will degrade signal characteristics. It is therefore crucial to design for all possible losses scenarios before the satellite is deployed. This paper presents the fundamentals of a satellite link analysis. A link analysis model for the satellite is designed in order to analyze satellite link and then calculate of the link budget for GEO satellite (Badr sat) in two sits in Libya (Sebha and Benghazi), using actual climatic parameters at Ku-band frequency. The model is implemented using Matlab software. This paper also presents evaluation of the satellite link performance.