An Inter-Group Swapping Based Resource Scheduling Scheme for Quasi-Single Frequency Multi-beam Mobile Satellite System

A resource scheduling scheme is proposed in this paper for multi-beam satellite system to eliminate downlink interference as well as to overcome the noise amplification problem caused by Tomlinson-Hiroshima preceding. Firstly, to analyze the noise amplification problem, Tomlinson-Hiroshima preceding (THP) is discussed. Secondly, an inter-group swapping based resource scheduling scheme is proposed to according to the principle of minimizing the maximum noise amplification factor of the same frequency users. Finally, simulations are executed to validate the proposed scheme, which suggest that compared to no-swapping scheme, the proposed scheme can successfully reduce the ratio of low SINR users and improve the minimum signal to interference and noise ratio(SINR).