基于SIC技术的宽带卫星容量提升方法研究

Research on Broadband Satellite Capacity Improvement Method Based on SIC Technology

提升宽带卫星通信系统的用户接入容量是系统设计关注的重要的问题,在频谱资源紧缺的今天,非正交多址接入技术得到了行业内的高度重视,在地面5G/6G移动通信系统中提出了多类非正交多址接入方法。在宽带卫星通信系统中传统使用的MF-TDMA多址接入方式的基础上,引入了符号同步MF-TDMA接入技术,同时将SIC技术用于MF-TDMA多址方式的业务信道,在功率域增加多址接入的容量。基于此,开展了两重信号的SIC技术的性能分析,提出了一种译码辅助的SIC接收处理方法,在复杂度不高的情况下提升了系统接收性能。

Improving the user access capacity of broadband satellite communication system is an important issue concerned by the system design.Today,when spectrum resources are scarce,non-orthogonal multiple access technology has been highly valued by the industry.In the ground 5G/6G mobile communication system,a variety of non-orthogonal multiple access methods have been proposed.Based on the traditional MF-TDMA multiple access method used in broadband satellite communication system,this paper introduces symbol synchronous MF-TDMA access technology,and applies SIC technology to the service channel of MF-TDMA multiple access method to increase the capacity of multiple access in the power domain.Based on this,the performance analysis of dual signal SIC technology is carried out,and a decoding-assisted SIC reception processing method is proposed,which improves the system reception performance without high complexity.