Author(s): FENG Yu-long
Pages: 753-758
Year: 2014 Issue:  6
Journal: Telecommunication Engineering
Keyword:  multi-beam satellite; data distribution; downlink error control; packet-level FEC; rain attenua-tion; heterogeneity;
Abstract: To eliminate the influence of rain attenuation on satellite downlink heterogeneity in satellite data distribution system,a satellite data distribution system model which adopts satellite regenerator and multi-beam technology is built,and the downlink error control method based on the technology of adaptive packet-level FEC is presented,which changes the correcting code rate according to the rain grade,and realizes the dynamic adjustment of downlink error control with the uplink not being occupied,the arithmetic expres-sions of the satellite adaptive forward error control( FEC) which adopts RSE code are deduced. Finally,the method is compared with the end to end FEC technology by simulating in MATLAB software and the result shows that the scheme can improve the network throughput efficiency by 12% ~15% when the downlink rain rate is below 50%. Therefore,the method can be consulted for design of multi-beam satellite data dis-tribution system.