Key Parameter Mapping Method of Signal-To-Noise Ratio from Link Simulation to System Simulation

Research institutions around the world plan to build a simulation platform that links constellation configuration and protocols together to support the design and verification of key technologies in 6G satellite communication systems. An important issue to improve the reliability and efficiency of simulation verification is how to effectively transfer the parameters of link-level simulation and system-level simulation. In this paper, by optimizing the traditional ground-based EESM algorithm, 12 kinds of channels are fitted, and all L2S interface parameter $\beta$ values under MCS are obtained, and a MCS is proposed for $\beta$ fitting verification, and the fitting effect meets the specified error Required by 3GPP. The wideband CQI value is obtained through the simulation results of all links and based on the subband weighted CQI method. Then specify the MCS-CQI mapping table according to the CQI value, and simulate the link adaptive adjustment process through the mapping table. Finally, the feedback SNR and CQI are used to verify whether the corresponding BLER value meets the requirement of less than 10%.