Research on Threshold Selection Algorithm for Adaptive Modulation and Coding Scheme

With the satellite communication as a key technology to achieve global seamless coverage, how to meet the different types of business needs and achieve reliable transmission of information under the conditions of limited resources have become an important issue that we need to face currently. Adaptive modulation and coding technology has good link adaptive effect in the satellite mobile communication fading channel. By assessing the merits of the channel state, the sender changes the various parameters of signal dynamically to achieve the purpose of improving system performance in different channel environments. Therefore, in order to make the system have the best adaptive transmission effect, it is necessary to select the most suitable MCS. In this paper, we first discuss the MCS selection algorithm, and simulate in the three different satellite channel environments to determine the thresholds of modulation and coding scheme.