MODELING OF SATELLITE COMMUNICATION LINKS WITH ORTHOGONAL FREQUENCY-DIVISION MULTIPLEXING

Abstract

Global technologies of data transmission in real time are developing constantly. Therefore modeling of messages transmission through satellite constellations is an actual problem. In this paper the original model of a communication channel "Vehicle-to-Satellite-to-Ground Station" based on principles of the IEEE 802.11a standard is designed using MATLABSіmulіnk software. The model allows simulating data transmission with data rate from 6 to 54 Mbit/s using adaptive modulation. For uplink/downlink two types of channels were analyzed - a free space path losses with phase/frequency offset and AWGN link. On the base of this model channel integrity was investigated and dependences of a signal-noiseratio (SNR) on free space path losses, antennas diameters, number of OFDM symbols and satellite transponder noise temperature were received.