Design And Simulation Of Satellite Communication System Link

The rapid progress of wireless communication has affected the development of satellite communications.The inherent advantages of satellite communications have also promoted the vigorous development in many countries.With many advantages it is widely used in major fields such as emergency communications,national security and manned space flight.Before developing the satellite communication system the system link is generally designed first to ensure that the established system has better performance.Based on the design of communication links,the system model is established by using computer-aided technique and its simulation analysis is carried out,which provides an effective data basis for the correct design and modeling of the systemThe influence of the characteristics of Satellite communication link,such as far distance transmitting,openness and transparence,exerted on signal is the fundamental consideration counted into when it is designed.This study aims to analyze the loss of link transmission,calculate the atmospheric absorption loss and rainfall attenuation of radio waves.The calculated link attenuation is applied to the link design budget,thus we can get the key indexes of satellite communication link design.At the same time,the system modeling software System Vue is used to design,model and further analyze the ground station transmission,satellite transponder and ground station reception in accordance with the technical indicators of the link and to simulate the entire system and the link according to the BER to verify the function of the system.In order to analyze the anti-jamming performance of the system,this study sets up the uplink/downlink interference model and designs the interference simulation software platform.Finally comes the summary of this study.It explores the shortcomings of the system design and simulation work,makes a prospect for the Link simulation design of the satellite communication system and provides an effective reference to the link designers of satellite communication systems by studying the design of the system link in this study.