RADIO FREQUENCY INTERFERENCE IN SATELLITE COMMUNICATIONS SYSTEMS

ABSTRACT

 

The quality of signals received by the satellite transponder and that retransmitted and received by the receiving earth station is important if successful information transfer via the satellite is to be achieved. On the other hand, Radio-frequency spectrum and the geosynchronous orbit are natural resources; therefore geosynchronous satellites must share limited space and frequency spectrum within a given arc of a geostationary orbit. To assure that future networks can grow and be upgraded, controlled and coordinated interference environments must be guaranteed continuously, even in the face of ever-increasing interference. This involves knowledge of

  • The various sources of interferences to satellite systems
  • The limitations on allowable interference for the types of traffic being transmitted
  • Many other factors that determine the acceptability of using any frequency for a given purpose.

This project gives a deep study and description of the potential sources, types and effects of different levels of RF interference in Fixed Service (FS) Satellite Systems on system performance. Two neighbouring satellite systems are considered. A Satellite Link Budget is prepared to analyse the effects of Adjacent satellite interference and co-channel interference on satellite system performance using Carrier-to-Noise plus Interference Ratio, (C/(N+I)). The vulnerability of the system to the interference is assessed. The objective is to ensure that baseband performance requirement is met.

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