Research on precoding techniques of multi-beam satellite communication

At present, inter-beam interference elimination has great development needs in multi-beam mobile satellite communication. In this paper, based on the precoding technology research and application, which is a reliable way, and through the analysis of the forward link mode of multi-beam satellite communication system, the principle of realization of the linear technology represented by forced zero ZF precoding and the nonlinear technology represented by dirty paper DPC precoding was introduced, and then the advantages and disadvantages of the two precoding techniques and their application scope were summarized. Finally, an improved DPC-RZF algorithm was proposed, and its performance was compared with that of ZF and RZF by MATLAB simulation. When the number of beams was large, the system throughput increased by nearly 30%, which proved the effectiveness.