In order to make full use of the link resources for data transmission from near‐earth remote sensing satellites, variable coding modulation (VCM) system is used to fully utilize the system link margin to improve the satellite data transmission performance. By analyzing the dynamic link under the VCM data transmission system, the contribution of the VCM system to the satellite data link optimization is studied from the perspective of engineering application, which can provide reference for the data link design of remote sensing satellites. Applying the flow design, for the currently adopted transmission system of X band, compared with traditional constant coding modulation (CCM) system, the average link performance of VCM system can be increased by 42.1% in single‐station transmission mode and 53.3% in dual‐station relay mode through the exampled analysis.

中文翻译：

---

基于第二代数字视频广播卫星的可变编码调制系统在近地遥感卫星数据传输中的应用研究

为了充分利用链路资源进行近地遥感卫星的数据传输，采用可变编码调制（VCM）系统来充分利用系统链路余量来提高卫星数据传输性能。通过分析VCM数据传输系统下的动态链路，从工程应用的角度研究了VCM系统对卫星数据链路优化的贡献，可为遥感卫星数据链路的设计提供参考。应用流设计，对于当前采用的X波段传输系统，与传统的恒定编码调制（CCM）系统相比，VCM系统的平均链路性能在单站传输模式下可以提高42.1％，在53情况下可以提高。